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Technical￿training.
Product￿information.
G14￿Complete￿Vehicle
BMW￿Service

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  • Page 1 Technical￿training. Product￿information. G14￿Complete￿Vehicle BMW￿Service...
  • Page 2 General￿information Symbols￿used The￿following￿symbol￿is￿used￿in￿this￿document￿to￿facilitate￿better￿comprehension￿or￿to￿draw￿attention to￿very￿important￿information: Contains￿important￿safety￿information￿and￿information￿that￿needs￿to￿be￿observed￿strictly￿in￿order￿to guarantee￿the￿smooth￿operation￿of￿the￿system. Information￿status:￿November￿2018 BMW￿Group￿vehicles￿meet￿the￿requirements￿of￿the￿highest￿safety￿and￿quality￿standards.￿Changes in￿requirements￿for￿environmental￿protection,￿customer￿benefits￿and￿design￿render￿necessary continuous￿development￿of￿systems￿and￿components.￿Consequently,￿there￿may￿be￿discrepancies between￿the￿contents￿of￿this￿document￿and￿the￿vehicles￿available￿in￿the￿training￿course. The￿information￿contained￿in￿the￿training￿course￿materials￿is￿solely￿intended￿for￿participants￿in￿this training￿course￿conducted￿by￿BMW￿Group￿Technical￿Training￿Centers,￿or￿BMW￿Group￿Contract Training￿Facilities. This￿training￿manual￿or￿any￿attached￿publication￿is￿not￿intended￿to￿be￿a￿complete￿and￿all￿inclusive source￿for￿repair￿and￿maintenance￿data.￿It￿is￿only￿part￿of￿a￿training￿information￿system￿designed￿to assure￿that￿uniform￿procedures￿and￿information￿are￿presented￿to￿all￿participants. For￿changes/additions￿to￿the￿technical￿data,￿repair￿procedures,￿please￿refer￿to￿the￿current￿information issued￿by￿BMW￿of￿North￿America,￿LLC,￿Technical￿Service￿Department. This￿information￿is￿available￿by￿accessing￿TIS￿at￿www.bmwcenternet.com. Additional￿sources￿of￿information Further￿information￿on￿the￿individual￿topics￿can￿be￿found￿in￿the￿following: • Owner's￿Handbook • Integrated￿Service￿Technical￿Application • Aftersales￿Information￿Research￿(AIR) The￿information￿contained￿in￿this￿manual￿is￿not￿to￿be￿resold,￿bartered,￿copied,￿or￿transferred without￿the￿express￿written￿consent￿of￿BMW￿of￿North￿America,￿LLC￿(“BMW￿NA”). ©2019￿BMW￿of￿North￿America,￿LLC The￿BMW￿name￿and￿logo￿are￿registered￿trademarks.￿All￿rights￿reserved.

  • Page 3: Table Of Contents

    G14￿Complete￿Vehicle Contents. Introduction ................................................1.1. Overview ............................................... 1.2. Outer￿dimensions ........................................1.3. Dimensions,￿data￿and￿comparison￿of￿outlines ......................1.4. Weights￿and￿payload ......................................1.5. Models ..............................................Body￿Structure ..............................................2.1. Materials ............................................... 2.2. Stiffening￿measures ......................................2.2.1. Braces ........................................2.2.2. Rollover￿protection￿system ........................... Outer￿Body￿Skin ............................................3.1. Materials ............................................Doors,￿Lids￿and￿Hatches ......................................

  • Page 5: Introduction

    G14￿Complete￿Vehicle 1.￿Introduction 1.1.￿Overview The￿BMW￿8￿series￿convertible￿with￿the￿development￿name￿G14￿is￿the￿first￿open-air￿model￿in￿the BMW￿8￿series￿family.￿With￿its￿exceptional￿driving￿dynamics,￿effortless￿long-distance￿comfort,￿exquisite equipment￿and￿cutting-edge￿technology,￿it￿provides￿a￿new￿top￿class￿in￿the￿luxury￿segment. The￿new￿2+2-seater￿from￿BMW￿is￿a￿convertible￿sports￿car￿with￿a￿high-quality,￿fully-automatic￿fabric soft￿top.￿Luxury￿and￿sportiness￿come￿together￿in￿perfect￿harmony￿in￿the￿G14.￿It￿offers￿extensive standard￿equipment,￿such￿as￿integral￿active￿steering,￿sport￿exhaust,￿adaptive￿M-suspension,￿leather- covered￿instrument￿panel,￿ambient￿light￿and￿adaptive￿LED￿headlights. From￿a￿technical￿viewpoint,￿the￿G14￿is￿in￿a￿number￿of￿aspects￿based￿on￿the￿G15.￿Therefore￿many components'￿operating￿principles￿are￿already￿described￿for￿the￿G15. Compared￿to￿the￿G15,￿the￿following￿changes￿are￿particularly￿noteworthy: • Fully-automatic,￿electro-hydraulic￿fabric￿soft￿top • With￿high-quality￿wind￿deflector￿as￿standard • Active,￿fully-recessed￿rollover￿protection￿system • Additional￿cross-struts￿in￿the￿body￿structure • Automatic￿operation￿of￿the￿tailgate￿with￿hydraulic￿drive • Use￿of￿SRT￿leather￿(Sun￿Reflective￿Technology)￿on￿seats￿with￿dark￿leather￿colors • Neck￿warmer￿built￿into￿the￿front￿headrests • Rear￿headrest￿shell • Driver’s￿door￿switch￿cluster￿with￿4￿power￿window￿regulator￿buttons￿and￿an￿all-window￿button • Electrically￿operated￿rear￿side￿windows.
  • Page 6 G14￿Complete￿Vehicle 1.￿Introduction 1.2.￿Outer￿dimensions The￿exterior￿dimensions￿of￿the￿G14￿are￿shown￿below: G14￿outer￿dimensions Index Explanation Unit BMW M850i xDrive Vehicle￿height [mm] 1345 Front￿track￿width,￿basic￿wheels [mm] 1619 Front￿overhang [mm] Wheelbase [mm] 2822 Rear￿overhang [mm] 1076 Rear￿track￿width,￿basic￿wheels [mm] 1642 Vehicle￿length [mm] 4856 Vehicle￿width￿excluding/ [mm] 1902/2137 including￿exterior￿mirrors...
  • Page 7 G14￿Complete￿Vehicle 1.￿Introduction 1.3.￿Dimensions,￿data￿and￿comparison￿of￿outlines The￿following￿graphic￿compares￿the￿silhouette￿of￿the￿G14￿to￿that￿of￿an￿G15: Silhouette￿comparison￿of￿G14/G15 The￿following￿table￿shows￿the￿most￿important￿data￿of￿the￿G14￿and￿compares￿this￿directly￿with￿the G15: Unit G14￿M850i G15￿M850i Difference xDrive xDrive Vehicle￿height [mm] 1345 1346 Vehicle￿length [mm] 4856 4856 Wheelbase [mm] 2822 2822 Width￿excluding￿exterior [mm] 1902 1902 mirrors Vehicle￿width￿with￿exterior [mm] 2137 2137 mirrors Vehicle￿curb￿weight￿(US) [lbs] 4736 4478 +258...

  • Page 8: Models

    G14￿Complete￿Vehicle 1.￿Introduction 1.5.￿Models The￿G14￿will￿be￿available￿at￿market￿introduction￿with￿the￿following￿models: Model Engine Displacement Power Torque [cc] output [kW￿(HP)] (lb-ft)] BMW￿M850i￿xDrive N63T3 4395 390￿(523) 750￿(553)

  • Page 9: Materials

    G14￿Complete￿Vehicle 2.￿Body￿Structure 2.1.￿Materials G14￿material￿overview,￿body￿structure Index Explanation Ultra-high￿strength￿hot-formed￿steel￿(>￿900￿N/mm²) Multiphase￿steel￿(> 300￿N/mm²) Aluminum Carbon Other￿steel As￿with￿the￿G15,￿the￿lightweight￿body￿concept￿of￿the￿G14￿is￿made￿of￿high-strength￿hot-formed￿steel, aluminum￿and￿carbon.￿Thanks￿to￿the￿material￿mix,￿the￿materials￿are￿able￿to￿contribute￿their￿specific strengths￿to￿the￿vehicle￿in￿the￿best￿possible￿way. The￿number￿of￿aluminum￿components￿(die-cast￿and￿extruded￿profiles)￿has￿increased￿considerably. For￿example,￿the￿rear￿longitudinal￿carrier￿and￿strut￿dome￿are￿made￿from￿aluminum￿as￿in￿the￿G15.

  • Page 10: Braces

    G14￿Complete￿Vehicle 2.￿Body￿Structure 2.2.￿Stiffening￿measures 2.2.1.￿Braces Like￿on￿all￿BMW￿convertibles,￿additional￿cross-struts￿are￿installed￿on￿the￿G14￿in￿comparison￿with￿the Coupé￿version.￿Together￿with￿the￿rollover￿protection￿module,￿these￿increase￿the￿rigidity￿of￿the￿body and￿are￿particularly￿effective￿in￿preventing￿body￿distortion. G14￿strut￿concept 2.2.2.￿Rollover￿protection￿system In￿the￿G14,￿the￿active￿rollover￿protection￿system￿installed￿as￿standard￿is￿located￿behind￿the￿head￿rests and￿is￿fully￿recessed.￿It￿is￿a￿passive￿safety￿system￿which￿is￿automatically￿activated￿in￿the￿event￿of rollover￿or￿a￿critical￿driving￿(for￿example￿extreme￿lengthwise￿or￿crosswise￿tilting)￿and￿which,￿together with￿the￿windshield￿frame,￿ensures￿a￿survival￿space￿for￿the￿occupants. Rollover￿is￿detected￿by￿the￿roll￿rate￿sensor￿and￿vertical￿acceleration￿sensor￿in￿the￿Advanced￿Crash Safety￿Module￿(ACSM).￿This￿emits￿a￿signal￿(all-fire￿signal)￿for￿activating￿the￿two￿pyrotechnic￿actuators in￿the￿rollover￿protection￿system. A￿triggering￿unit￿with￿a￿pyrotechnic￿element￿is￿located￿at￿both￿the￿left-￿and￿right-hand￿lower￿end of￿the￿rollover￿protection￿system.￿Each￿of￿the￿two￿triggering￿units￿indirectly￿releases￿a￿preloaded compression￿spring￿via￿the￿pyrotechnic￿element￿in￿order￿to￿extend￿a￿rollover￿bar￿to￿the￿left￿and￿right.
  • Page 11 G14￿Complete￿Vehicle 2.￿Body￿Structure When￿the￿all-fire￿signal￿is￿received￿by￿the￿pyrotechnic￿element,￿this￿triggers￿and￿generates￿gas pressure￿in￿the￿floor￿of￿the￿triggering￿unit.￿This￿extends￿a￿piston￿which￿opens￿a￿predetermined breaking￿point￿and￿thus￿the￿retaining￿part￿of￿the￿compression￿spring￿and￿pre-accelerates￿the￿rollover bar￿over￿a￿short￿stroke.￿The￿preloaded￿compression￿spring￿is￿now￿released￿and￿the￿rollover￿bar￿is extended.￿In￿its￿end￿position,￿it￿form-locks￿by￿means￿of￿pawls￿and￿a￿toothed￿bar. After￿the￿rollover￿protection￿system￿is￿triggered,￿the￿ignition￿elements￿and￿the￿triggering￿systems￿are inactive.￿In￿this￿case,￿the￿rollover￿protection￿system￿must￿be￿completely￿replaced. The￿rollover￿protection￿system￿may￿only￿be￿removed￿and￿installed￿or￿replaced￿as￿a￿whole￿ Removing￿and￿installing￿or￿replacing￿individual￿components￿is￿not￿permitted. Risk￿of￿life-threatening￿injuries￿ Work￿on￿pyrotechnic￿parts￿may￿only￿be￿carried￿out￿by￿expert￿and￿appropriately￿trained￿people. The￿rollover￿protection￿system￿is￿under￿considerable￿spring￿tension￿￿Incorrect￿handling￿can￿trigger￿the rollover￿protection￿system￿unexpectedly￿and￿cause￿injuries. When￿carrying￿out￿repair￿work￿on￿the￿rollover￿protection￿system,￿ensure￿that￿no￿foreign￿bodies￿find their￿way￿into￿the￿system,￿otherwise￿it￿will￿be￿damaged￿￿Depending￿on￿the￿type￿of￿repair,￿it￿may￿be reasonable￿to￿remove￿the￿rollover￿protection￿system￿for￿the￿duration￿of￿the￿repair￿work.
  • Page 12 G14￿Complete￿Vehicle 2.￿Body￿Structure G14￿rollover￿protection￿system Index Explanation Locking￿clip Rollover￿bar Locking￿pawl Hole￿(access￿for￿the￿allen￿key￿to￿open￿the￿pawl) Rollover￿bar￿toothed￿bar Triggering￿unit￿with￿pyrotechnic￿element Checking￿the￿rollover￿protection￿system After￿accident￿repairs,￿and￿in￿particular￿read￿end￿and￿side￿collisions,￿a￿visual￿inspection￿of￿the￿rollover protection￿system￿shall￿be￿carried￿out.￿Deformations￿to￿nearby￿components￿can￿lead￿to￿locked-up stress,￿affecting￿the￿operation￿of￿the￿rollover￿protection￿system￿(for￿example￿increased￿implementation time).￿Furthermore,￿foreign￿bodies￿that￿have￿entered￿the￿rollover￿protection￿system￿can￿block￿the system.
  • Page 13 G14￿Complete￿Vehicle 2.￿Body￿Structure To￿the￿check￿the￿freedom￿of￿motion￿of￿the￿rollover￿bar￿and￿the￿operation￿of￿the￿pawl￿and￿toothed￿bar, the￿rollover￿bar￿can￿be￿pulled￿out￿and￿pushed￿in￿manually.￿To￿do￿this,￿the￿rear￿seat￿backs￿must￿be folded￿down￿and￿all￿negative￿battery￿terminals￿must￿be￿disconnected.￿The￿next￿steps￿are￿to: Extend Unclip￿the￿cover￿from￿the￿rollover￿bar￿at￿the￿top￿and￿the￿cover￿behind￿the￿rear￿seat￿back. Remove￿the￿locking￿clip￿at￿the￿top￿of￿the￿rollover￿bar￿using￿a￿suitable￿tool. Pull￿the￿rollover￿bar￿upwards￿to￿the￿limit￿stop.￿Metallic￿noises￿should￿be￿clearly￿heard￿(pawl￿sliding over￿the￿toothed￿bar). It￿must￿be￿possible￿to￿pull￿the￿rollover￿bar￿out￿slightly￿and￿snap￿it￿into￿the￿end￿position. Retract Pull￿the￿inner￿profile￿upwards￿to￿the￿end￿stop￿and￿hold. Insert￿a￿6mm￿allen￿key￿through￿the￿hole￿(see￿diagram￿"G14￿rollover￿protection￿system",￿index￿4) into￿the￿pawl,￿turn￿90￿degrees￿and￿hold.￿This￿unlocks￿the￿pawl￿and￿releases￿the￿rollover￿bar￿on the￿toothed￿bar. Slowly￿lower￿the￿rollover￿bar￿downwards￿as￿far￿as￿possible￿and￿remove￿the￿allen￿key. Attention￿￿In￿no￿event￿should￿you￿drop￿the￿rollbar￿as￿this￿will￿damage￿the￿lower￿support￿ Press￿the￿rollover￿bar￿downwards￿and￿secure￿the￿locking￿clip. Clip￿the￿covers￿into￿place. Result • If￿the￿rollover￿bar￿does￿not￿clip￿into￿the￿end￿position￿or￿if￿it￿cannot￿be￿pulled￿out￿slightly,￿the rollover￿protection￿system￿must￿be￿replaced. • If￿the￿rollover￿bar￿does￿not￿slide￿downwards￿without￿any￿resistance,￿the￿rollover￿protection system￿must￿be￿replaced. These￿checks￿must￿always￿be￿carried￿out￿on￿both￿sides. Unlike￿with￿previous￿active￿rollover￿protection￿systems￿on￿BMW￿convertibles,￿the￿preloaded compression￿springs￿in￿this￿system￿cannot￿be￿released￿by￿means￿of￿a￿test￿triggering.

  • Page 14: Materials

    G14￿Complete￿Vehicle 3.￿Outer￿Body￿Skin 3.1.￿Materials G14￿overview￿of￿materials,￿outer￿body￿skin Index Explanation Other￿steel￿grades Aluminum Plastic￿(SMC,￿PP ,￿EPDM) Deep￿drawing￿steel...

  • Page 15: Doors

    G14￿Complete￿Vehicle 4.￿Doors,￿Lids￿and￿Hatches 4.1.￿Doors The￿doors￿of￿the￿G14￿have￿an￿aluminum￿shell￿design.￿A￿plastic￿module￿carrier￿divides￿the￿interior￿of the￿door￿into￿a￿dry￿and￿wet￿side.￿It￿is￿mounted￿on￿the￿door￿structure￿by￿means￿of￿screws￿and￿bayonet fittings.￿Sensitive￿components,￿such￿as￿speakers￿and￿airbag￿sensors,￿are￿located￿on￿the￿dry￿side.￿The power￿window￿motor￿and￿the￿power￿window￿mechanism￿are￿located￿on￿the￿wet￿side. G14￿door￿module￿carrier Index Explanation Power￿window￿motor Door￿module￿carrier Multi-tooth￿screw￿(range￿of￿adjustment￿of￿side￿window￿in￿z￿and￿x￿direction) Bolts￿with￿fastening￿nuts￿(range￿of￿adjustment￿of￿side￿window￿in￿y-direction) Cover￿(access￿to￿the￿range￿of￿adjustment￿position￿4) 4.1.1.￿Side￿windows On￿the￿G14￿too,￿the￿correct￿adjustment￿of￿the￿front￿and￿rear￿frameless￿side￿window￿is￿very￿important. The￿following￿characteristics￿are￿thus￿achieved￿in￿the￿side￿window￿area: • Leak-tightness￿(avoids￿wind￿noise￿and￿water￿ingress) • Avoidance￿of￿rattling￿and￿creaking • No￿undesired￿reversing￿of￿the￿side￿windows￿during￿the￿closing￿action￿(anti-trap￿function). The￿special￿tool￿required￿to￿adjust￿the￿side￿window￿adjustment￿elements￿match￿those￿of￿the￿current BMW￿convertibles￿and￿coupés.

  • Page 16: Tailgate

    G14￿Complete￿Vehicle 4.￿Doors,￿Lids￿and￿Hatches The￿current￿repair￿instructions￿must￿always￿be￿observed￿for￿the￿procedure￿and￿exact￿dimensions￿for correct￿adjustments. 4.2.￿Tailgate G14￿tailgate￿components Index Explanation Outer￿skin￿(plastic) LH￿hinge￿reinforcement￿(steel) RH￿hinge￿reinforcement￿(steel) Inner￿shell￿(plastic) RH￿tail￿light￿housing￿(plastic) Lock￿reinforcement￿(steel) LH￿tail￿light￿housing￿(plastic)
  • Page 17 G14￿Complete￿Vehicle 4.￿Doors,￿Lids￿and￿Hatches The￿tailgate￿is￿primarily￿made￿from￿a￿"sheet￿moulding￿compound"￿(SMC)￿fiber-reinforced￿plastic material￿with￿a￿surface￿that￿can￿be￿coated￿by￿means￿of￿an￿In-Mould￿Coating￿(IMC)￿procedure.￿In-Mould Coating￿is￿a￿procedure￿during￿which￿the￿surface￿of￿the￿shaped￿part￿is￿coated￿while￿still￿in￿the￿mould. Additional￿facing￿components￿are￿this￿not￿required,￿thereby￿increasing￿the￿freedom￿in￿the￿geometric design￿and￿reducing￿the￿weight. G14￿tailgate...
  • Page 18 G14￿Complete￿Vehicle 4.￿Doors,￿Lids￿and￿Hatches Index Explanation Spring￿support Hydraulic￿unit Tailgate￿lock Hydraulic￿cylinder￿with￿integrated￿sensor Automatic￿Soft￿Close￿system The￿G14￿features￿an￿automatic￿tailgate￿operation￿as￿standard.￿On￿the￿G14,￿a￿single-sided￿hydraulic drive￿on￿the￿right-hand￿side￿of￿the￿tailgate￿is￿used￿for￿the￿very￿first￿time,￿with￿its￿hydraulic￿circuit integrated￿into￿the￿convertible￿top￿hydraulics.￿This￿facilitates￿use￿of￿a￿compact￿drive￿requiring￿little space. A￿closing￿assistance￿mechanism￿(Automatic￿Soft￿Close￿system)￿is￿used￿to￿lock￿the￿tailgate￿into￿the tailgate￿latch.

  • Page 19: Overview

    G14￿Complete￿Vehicle 5.￿Passenger￿Compartment 5.1.￿Overview G14￿interior￿equipment Index Explanation Power￿window￿switch,￿front￿left Power￿window￿switch,￿front￿right Power￿window￿switch,￿rear￿right Power￿window￿switch,￿rear￿left Central￿power￿window￿regulator￿switch Convertible￿top￿button Frameless￿interior￿mirror Display￿(integrated￿automatic￿heating/air￿conditioning￿system) Heating￿and￿air￿conditioning￿controls Radio￿operating￿unit Cover￿(wireless￿charging￿station￿and￿cup￿holder) Selector￿lever Controller Light￿operating￿unit...
  • Page 20 G14￿Complete￿Vehicle 5.￿Passenger￿Compartment 5.2.￿Front￿seats As￿on￿the￿G15￿electrically-adjustable￿multi-function￿seats￿with￿memory￿function￿are￿installed￿in the￿basic￿version￿of￿the￿G14￿for￿the￿driver￿and￿front￿passenger.￿The￿switches￿for￿fore-and-aft￿seat adjustment￿are￿on￿the￿seat. The￿backrest￿folding￿with￿comfort￿access￿function￿(automatic￿operation￿of￿the￿seat￿when￿folding)￿is activated￿by￿means￿of￿a￿leather￿strap￿on￿the￿rear￿of￿the￿seat￿in￿the￿headrest￿area.￿The￿headrests￿are retracted￿automatically￿to￿prevent￿them￿for￿contacting￿the￿roof￿liner. Visually￿integrated￿head￿restraints￿are￿equipped￿with￿all￿the￿functionality￿and￿comfort￿of￿a￿height￿and depth-adjustable￿head￿restraint.￿An￿optional￿neck￿warmer￿integrated￿into￿the￿headrest￿can￿be￿ordered for￿the￿driver￿and￿front￿passenger￿seat.￿This￿ensures￿particularly￿comfortable￿driving￿as￿it￿keeps￿the head￿and￿shoulders￿pleasantly￿warm.￿If￿the￿roof￿is￿open,￿the￿warm￿air￿system￿of￿the￿neck￿warmer￿is adjusted￿automatically￿according￿to￿the￿speed￿and￿outside￿temperature.￿One￿of￿three￿temperature levels￿can￿also￿be￿selected. G14￿seats Index Explanation Cold￿air Warm￿air Front￿headrests￿with￿integrated￿neck￿warmer Rear￿headrests￿built￿into￿the￿body Headrest￿depth￿adjustment...
  • Page 21 G14￿Complete￿Vehicle 5.￿Passenger￿Compartment Index Explanation Electric￿fan Air￿inlet Air￿outlet PTC￿auxiliary￿heating 5.3.￿Rear￿seats Unlike￿on￿the￿G15￿the￿rear￿headrests￿are￿built￿in￿on￿the￿G14. Both￿rear￿seat￿backrests￿can￿be￿folded￿forwards￿separately￿(50/50￿split).￿The￿through-loading￿design offers￿considerable￿variability￿when￿using￿the￿luggage￿space.￿The￿rear￿seat￿backrests￿are￿unlocked￿via two￿mechanical￿remote￿backrest￿unlocking￿mechanisms￿in￿the￿luggage￿space.
  • Page 22 G14￿Complete￿Vehicle 6.￿Soft￿Top The￿G14￿fully-automatic,￿electrohydraulic￿fabric￿soft￿top.￿This￿is￿a￿new￿feature￿that￿has￿been￿strongly weight-optimized.￿The￿multiple￿roof-bow￿piping￿design￿and￿a￿multilayer￿non-woven￿material￿and acoustic￿insulation￿have￿helped￿reduce￿wind￿noise￿even￿further.￿In￿both￿variants,￿the￿soft￿top￿fabric￿is available￿in￿black￿and￿as￿an￿option￿in￿anthracite￿with￿a￿silver￿effect. Comparing￿the￿fabric￿soft￿top￿of￿the￿G14￿with￿that￿on￿the￿F12,￿the￿following￿points￿stick￿out: • Tensioning￿bow￿roof￿on￿the￿G14￿instead￿of￿a￿fin￿roof￿on￿the￿F12. • Much￿lighter:￿58 kg￿(127￿lbs)￿on￿the￿G14￿compared￿to￿75 kg￿(165￿lbs)￿on￿the￿F12. • Much￿quieter￿in￿terms￿of￿both￿the￿driving￿noise￿with￿the￿fabric￿soft￿top￿closed￿and￿the functional￿noise￿when￿opening￿and￿closing. • Much￿quicker￿positioning￿speed,￿taking￿15 seconds￿to￿open￿and￿to￿close￿the￿fabric￿soft￿top￿on the￿G14￿compared￿to￿19 seconds￿to￿open￿and￿24 seconds￿to￿close￿it￿on￿the￿F12. • Possible￿to￿open￿and￿close￿the￿top￿up￿to￿a￿speed￿of￿50 km/h￿(31￿mph)￿on￿the￿G14￿compared￿to 40 km/h￿(25￿mph)￿on￿the￿F12. • More￿innovative￿convertible￿top￿lid￿(quieter,￿improved￿visual￿appearance,￿modified￿folding mechanism).

  • Page 23: Overview

    G14￿Complete￿Vehicle 6.￿Soft￿Top 6.1.￿System￿components 6.1.1.￿Overview G14￿overview￿of￿soft￿top￿components Index Explanation Soft￿top￿cover Convertible￿top￿frame Convertible￿top￿lid￿trim￿panel Convertible￿top￿compartment￿lid Seals Hydraulic￿system Headlining...
  • Page 24 G14￿Complete￿Vehicle 6.￿Soft￿Top The￿main￿soft￿top￿components,￿divided￿into￿mechanical,￿hydraulic￿and￿electrical￿components, are￿described￿in￿the￿following￿text: 6.1.2.￿Mechanical￿components Convertible￿top￿frame The￿convertible￿top￿frame￿is￿the￿framework￿to￿which￿the￿soft￿top￿cover,￿the￿headlining￿and￿the￿seals￿are mounted.￿On￿the￿G14,￿it￿is￿built￿with￿tensioning￿bow￿in￿order￿to￿improve￿the￿acoustics￿in￿the￿multiple roof￿bow￿piping￿design.￿The￿essential￿components￿of￿the￿convertible￿top￿frame￿are￿shown￿in￿the following￿diagram: G14￿convertible￿top￿frame Index Explanation Soft￿top￿bow,￿front Soft￿top￿bow,￿center Front￿roof￿frame￿suspension￿link Front￿roof￿frame￿coupler￿arm Main￿pillar...
  • Page 25 G14￿Complete￿Vehicle 6.￿Soft￿Top Index Explanation Landau￿bar￿1 Main￿controller Soft￿top￿bow,￿rear Landau￿bar￿2 Convertible￿top￿main￿bearing Soft￿top￿bow Convertible￿top￿lid￿main￿bearing￿and￿kinematics Bowden￿cable￿for￿manual￿release￿of￿convertible￿top￿lid The￿convertible￿top￿frame￿is￿connected￿at￿the￿two￿convertible￿top￿main￿bearings￿to￿the￿bodyshell.￿The main￿pillars,￿via￿the￿intermediate￿gearbox￿connecting￿bar,￿and￿the￿tensioning￿bow,￿via￿the￿toggle￿joint, are￿driven￿by￿the￿hydraulic￿cylinders￿to￿open￿and￿close￿the￿soft￿top.￿The￿soft￿top￿is￿locked￿at￿the￿cowl panel￿by￿the￿front￿soft￿top￿bow. Cowl￿panel￿lock￿drive The￿soft￿top￿is￿locked￿at￿the￿cowl￿panel￿in￿closed￿state.￿To￿lock￿the￿front￿bow￿to￿the￿windshield￿frame, the￿retaining￿hooks￿are￿moved￿by￿an￿electric￿motor￿via￿pushrods￿and￿a￿transmission.￿The￿electric￿drive of￿the￿windshield￿panel￿lock￿is￿located￿at￿the￿front￿bow.
  • Page 26 G14￿Complete￿Vehicle 6.￿Soft￿Top G14￿cowl￿panel￿lock Index Explanation Convertible￿top￿latch Pushrod Electric￿cowl￿panel￿lock￿drive RH￿connecting￿rod Hall￿effect￿sensor,￿cowl￿panel￿lock￿drive￿opened Pushrod,￿left Connection￿for￿manual￿operation...
  • Page 27 G14￿Complete￿Vehicle 6.￿Soft￿Top Index Explanation Hall￿effect￿sensor,￿cowl￿panel￿lock￿drive￿opened Electric￿drive￿bracket Retaining￿hook Hall￿effect￿sensor,￿cowl￿panel￿locked,￿left Linkage￿aperture￿flaps The￿linkage￿aperture￿flaps￿are￿controlled￿mechanically￿via￿a￿Bowden￿cable.￿The￿Bowden￿cable￿is secured￿to￿a￿suspension￿link￿on￿the￿convertible￿top￿lid￿kinematics.￿When￿opening￿the￿convertible top￿lid,￿the￿linkage￿aperture￿flaps￿are￿opened￿at￿the￿same￿time￿by￿means￿of￿the￿coupling￿with￿the convertible￿top￿lid￿kinematics. G14￿linkage￿aperture￿flap Index Explanation Linkage￿aperture￿flap Bowden￿cable Coupler￿arm...
  • Page 28 G14￿Complete￿Vehicle 6.￿Soft￿Top Convertible￿top￿compartment￿lid G14￿convertible￿top￿compartment￿lid Index Explanation Convertible￿top￿compartment￿lid The￿convertible￿top￿lid￿also￿contributes￿to￿the￿harmonious￿and￿high-quality￿total￿appearance.￿On￿the G14,￿the￿convertible￿top￿lid￿trim￿panel￿in￿leather￿grain￿with￿stitching￿is￿coordinated￿with￿the￿cockpit￿and door￿trim.￿An￿optical￿leap￿(as￿with￿other￿convertibles)￿between￿the￿inner￿waistbelt￿rail￿on￿the￿rear￿side windows￿and￿the￿trim￿strip￿of￿the￿convertible￿top￿lid￿is￿prevent￿by￿the￿fact￿that￿we￿have￿not￿sealed￿the trim￿strip￿on￿the￿G14￿but￿the￿trim￿panel￿on￿the￿convertible￿top￿lid.￿This￿allows￿a￿constant￿cross-section to￿be￿obtained￿in￿the￿transition￿area￿of￿the￿two￿trim￿strips￿(with￿no￿gap).
  • Page 29 G14￿Complete￿Vehicle 6.￿Soft￿Top G14￿individual￿convertible￿top￿lid￿components Index Explanation Convertible￿top￿lid￿trim￿panel Trim￿strip Convertible￿top￿lid￿body Gasket LH￿convertible￿top￿lid￿kinematics RH￿convertible￿top￿lid￿kinematics The￿convertible￿top￿lid￿shell￿consists￿of￿a￿"Sheet￿Moulding￿Compound"￿(SMC)￿fiber-reinforced￿plastic material.￿The￿convertible￿top￿lid￿trim￿panel￿completely￿closes￿the￿front￿area￿of￿the￿convertible￿top lid￿and￿is￿a￿15 mm￿sandwich￿element￿made￿from￿polyurethane￿and￿glass-fiber￿matting.￿A￿weight optimization￿of￿the￿convertible￿top￿lid￿is￿achieved￿such￿that￿the￿areas￿of￿the￿convertible￿top￿lid￿shell￿are cleared￿under￿the￿trim￿panel.￿The￿strength￿of￿the￿convertible￿top￿lid￿nevertheless￿remains￿unaffected as￿the￿convertible￿top￿lid￿shell￿is￿not￿the￿only￿carrying￿element,￿with￿the￿trim￿panel￿also￿playing￿a supportive￿role.￿Through￿this￿combination￿of￿convertible￿top￿lid￿shell￿and￿trim￿panel,￿approx.￿5 kg...
  • Page 30 G14￿Complete￿Vehicle 6.￿Soft￿Top (11￿lbs)￿(compared￿to￿F12)￿could￿be￿saved￿in￿the￿convertible￿top￿lid￿without￿affecting￿either￿the￿stability or￿strength. A￿trim￿strip￿is￿fitted￿between￿the￿convertible￿top￿lid￿shell￿and￿the￿trim￿panel.￿When￿fastening￿the￿trim strip,￿the￿correct￿screw￿sequence￿and￿torque￿must￿be￿observed.￿Furthermore,￿it￿must￿be￿correctly position￿on￿the￿convertible￿top￿lid￿and￿the￿correct￿gap￿dimension￿must￿be￿observed.￿To￿this￿end,￿the individual￿operations￿in￿the￿repair￿instructions￿must￿be￿carried￿out￿in￿the￿specified￿sequence. Convertible￿top￿lid￿kinematics G14￿convertible￿top￿lid￿kinematics Index Explanation Convertible￿top￿lid￿front￿locking￿(including￿z-direction￿adjustment￿element) Convertible￿top￿lid￿holding￿strip￿with￿spacer￿plate￿(adjustment￿possibilities x,￿y￿and￿z￿direction) Linkage￿outlet￿flap￿Bowden￿cable Hydraulic￿cylinder Coupler￿arm Rear￿convertible￿top￿lid￿locking￿hooks Bowden￿cable￿for￿manual￿release￿of￿convertible￿top￿lid...
  • Page 31 G14￿Complete￿Vehicle 6.￿Soft￿Top Variable￿convertible￿top￿compartment￿floor G14￿variable￿convertible￿top￿compartment￿floor Index Explanation Variable￿convertible￿top￿compartment￿floor,￿lower￿position Variable￿convertible￿top￿compartment￿floor,￿upper￿position Variable￿convertible￿top￿compartment￿floor By￿folding￿the￿variable￿convertible￿top￿compartment￿floor￿to￿the￿upper￿position,￿the￿volume￿of￿the￿trunk can￿be￿increased￿from￿280￿to￿350 liters￿when￿the￿fabric￿soft￿top￿is￿closed. Before￿the￿soft￿top￿is￿opened,￿the￿variable￿convertible￿top￿compartment￿floor￿must￿be￿returned￿to￿the lower￿position.￿This￿is￿detected￿by￿a￿microswitch￿and￿reported￿to￿the￿Convertible￿Top￿Module.
  • Page 32 G14￿Complete￿Vehicle 6.￿Soft￿Top 6.1.3.￿Hydraulic￿components Overview G14￿overview￿of￿the￿hydraulic￿components Index Explanation Hydraulic￿cylinder,￿soft￿top￿bow Hydraulic￿cylinder,￿main￿pillar Hydraulic￿cylinder,￿convertible￿top￿compartment￿lid Hydraulic￿unit Tailgate￿hydraulic￿cylinder Drive￿unit￿(pump￿motor￿with￿hydraulic￿pump) Switching￿block...
  • Page 33 G14￿Complete￿Vehicle 6.￿Soft￿Top Index Explanation Solenoid￿valve￿(for￿activating￿the￿changeover￿valve￿V1￿–￿soft￿top) Solenoid￿valve￿(for￿activating￿the￿changeover￿valve￿V2￿–￿soft￿top) Solenoid￿valve￿(for￿activating￿the￿changeover￿valve￿V3 –￿soft￿top) Oil￿reservoir Fluid￿filler￿plug Solenoid￿valve￿(for￿activating￿the￿changeover￿valve￿V4 –￿tailgate) Solenoid￿valve￿(for￿activating￿the￿changeover￿valve￿V5 –￿tailgate) Function The￿convertible￿top￿is￿driven￿hydraulically.￿The￿hydraulic￿system￿for￿the￿fabric￿soft￿top￿comprises six￿hydraulic￿cylinders￿which￿are￿activated￿by￿the￿hydraulic￿unit￿via￿pairs￿of￿hydraulic￿lines.￿Each￿pair of￿hydraulic￿cylinders￿operates￿via￿suspension￿links￿to￿the￿main￿pillars,￿the￿tensioning￿bow￿and￿the convertible￿top￿lid.￿The￿hydraulic￿cylinders￿can￿be￿pressurized￿at￿the￿piston￿and￿rod￿ends.￿Another hydraulic￿cylinder￿operates￿on￿the￿tailgate￿via￿its￿own￿circuit￿integrated￿into￿the￿convertible￿top hydraulics. The￿direction￿in￿which￿the￿hydraulic￿cylinders￿are￿actuated￿is￿dependent￿on￿the￿direction￿in￿which￿the hydraulic￿pump￿rotates￿and￿on￿the￿position￿of￿the￿corresponding￿changeover￿valve.￿When￿a￿hydraulic cylinder￿is￿pressurized￿at￿both￿ends,￿the￿pressure￿at￿the￿piston￿rod￿end￿is￿dominant￿(due￿to￿the￿larger reference￿surface)￿and￿the￿piston￿rod￿extends. The￿hydraulic￿unit￿is￿located￿at￿the￿rear￿right￿in￿the￿luggage￿compartment.￿The￿hydraulic￿fluid￿does￿not have￿to￿be￿changed￿(life-time￿oil￿filling).￿The￿hydraulic￿system￿is￿automatically￿bled￿into￿the￿oil￿reservoir, for￿example￿after￿repair￿work. The￿temperature￿of￿the￿hydraulic￿system￿is￿determined￿by￿the￿Convertible￿Top￿Module￿(CVM)￿by means￿of￿a￿computing￿model.￿If￿a￿certain￿temperature￿threshold￿is￿exceeded,￿the￿fabric￿soft￿top￿will￿be prevented￿from￿opening￿or￿closing￿(thermal￿protection).￿In￿the￿intermediate￿position,￿the￿fabric￿soft￿top can￿still￿be￿moved￿due￿to￿a￿danger￿of￿pinching,￿even￿if￿the￿thermal￿protection￿is￿activated.￿In￿this￿case, only￿the￿"closed"￿end￿position￿is￿blocked. The￿system￿pressure￿is￿restricted￿by￿a￿pressure￿limiting￿valve￿to￿180 bar￿(+ 10 bar).￿The￿operating pressure￿of￿the￿hydraulic￿pump￿is￿between￿190 and￿200 bar. If￿the￿convertible￿top￿movement￿is￿interrupted,￿the￿hydraulic￿system￿is￿automatically￿depressurized after￿a￿certain￿time.￿If￿the￿LIVE￿or￿DRIVE￿vehicle￿condition￿is￿activated,￿this￿happens￿after￿approx. 10 minutes,￿otherwise￿after￿a￿few￿seconds. If￿the￿hydraulic￿system￿has￿been￿depressurized￿beyond￿the￿end￿positions￿of￿the￿fabric￿soft￿top,￿the fabric￿soft￿top￿and￿the￿convertible￿top￿lid￿can￿move￿unintentionally￿and￿cause￿injury.￿The￿convertible top￿compartment￿lid￿is￿closed￿in￿sections,￿whereby￿the￿changeover￿valve 1￿is￿supplied￿with￿current￿on a￿rotating￿basis.￿Particular￿attention￿must￿be￿paid￿to￿this￿during￿repair￿or￿diagnostic￿work. If￿the￿fabric￿soft￿top￿is￿completely￿closed￿or￿open￿and￿the￿tailgate￿has￿not￿been￿actuated,￿the￿entire...
  • Page 34 G14￿Complete￿Vehicle 6.￿Soft￿Top System￿schematic,￿convertible￿top￿hydraulics G14￿convertible￿top￿system￿layout￿and￿specification￿diagram￿(fabric￿soft￿top￿closed) Index Explanation Convertible￿top￿lid￿hydraulic￿cylinder￿(convertible￿top￿lid￿closed) Main￿pillars￿hydraulic￿cylinder￿(main￿pillars￿deployed) Tensioning￿bow￿hydraulic￿cylinder￿(tensioning￿bow￿down) Pressure-limiting￿valve Hydraulic￿pump￿(PM1/PM2￿direction￿of￿rotation) Twin￿pressure￿valve Pressure-limiting￿valve Oil￿reservoir Changeover￿valve￿V1 Changeover￿valve￿V2  Changeover￿valve￿V3 ...
  • Page 35 G14￿Complete￿Vehicle 6.￿Soft￿Top Valve￿switchings Open￿soft￿top Direction￿of￿rotation Changeover￿valve Lifting￿the￿tensioning￿bow Unlocking￿and￿opening￿the convertible￿top￿lid Opening￿and￿deactivating￿the fabric￿soft￿top Closing￿and￿locking￿the convertible￿top￿lid Close￿soft￿top Direction￿of￿rotation Changeover￿valve Unlocking￿and￿opening￿the convertible￿top￿lid Positioning￿and￿closing￿the￿fabric soft￿top Closing￿and￿locking￿the convertible￿top￿lid Deactivating￿the￿tensioning￿bow 6.1.4.￿Electrical￿components Overview The￿following￿electrical￿components￿are￿primarily￿involved￿in￿the￿function￿of￿the￿soft￿top: • Convertible￿Top￿Module￿(CVM) • Convertible￿top￿button￿in￿the￿center￿console • Electric￿cowl￿panel￿lock￿drive • Hydraulic￿pump￿electrical￿drive￿in￿the￿convertible￿top￿hydraulic￿circuit • 2￿relays￿for￿activating￿hydraulic￿pump￿motor • 3￿solenoid￿valves￿for￿activating￿the￿changeover￿valves￿in￿the￿convertible￿top￿hydraulic￿circuit • 12￿Hall￿effect￿sensors￿detecting￿the￿position￿of￿the￿fabric￿soft￿top￿and￿the￿convertible￿top￿lid •...
  • Page 36 G14￿Complete￿Vehicle 6.￿Soft￿Top Buttons,￿control￿unit￿and￿drives G14￿convertible￿top￿button,￿Convertible￿Top￿Module￿and￿drive Index Explanation Electric￿cowl￿panel￿lock￿drive Convertible￿top￿button Convertible￿Top￿Module￿(CVM) Sensors All￿positions￿of￿the￿fabric￿soft￿top￿which￿are￿relevant￿for￿the￿movement￿process￿are￿monitored￿by 12￿hall￿effect￿sensors￿and￿one￿microswitch￿and￿signalled￿to￿the￿Convertible￿Top￿Module￿(CVM). All￿sensors￿of￿the￿soft￿top￿are￿supplied￿with￿voltage￿by￿the￿Convertible￿Top￿Module￿(CVM)￿and have￿diagnostic￿capability.
  • Page 37 G14￿Complete￿Vehicle 6.￿Soft￿Top G14￿overview￿of￿front￿convertible￿top￿sensors Index Explanation Hall￿effect￿sensor,￿cowl￿panel￿lock￿drive￿closed Hall￿effect￿sensor,￿cowl￿panel￿lock￿drive￿opened Hall￿effect￿sensor,￿cowl￿panel￿locked,￿left Hall￿effect￿sensor,￿cowl￿panel￿locked,￿right...
  • Page 38 G14￿Complete￿Vehicle 6.￿Soft￿Top Hall￿effect￿sensor,￿cowl￿panel￿lock￿drive￿closed:￿The￿hall￿effect￿sensor￿is￿located￿on • the￿front￿soft￿top￿bow￿in￿the￿area￿of￿the￿drive￿on￿the￿windshield￿panel￿locking￿carrier￿plate. When￿the￿drive￿has￿reached￿the￿"closed"￿end￿position,￿the￿hall￿effect￿sensor￿records￿the corresponding￿position￿of￿the￿rotary￿disc￿on￿the￿windshield￿panel￿locking￿drive. Hall￿effect￿sensor,￿cowl￿panel￿lock￿drive￿opened:￿The￿hall￿effect￿sensor￿is￿located￿on • the￿front￿soft￿top￿bow￿in￿the￿area￿of￿the￿drive￿on￿the￿windshield￿panel￿locking￿carrier￿plate. When￿the￿drive￿has￿reached￿the￿"open"￿end￿position,￿the￿hall￿effect￿sensor￿records￿the corresponding￿position￿of￿the￿rotary￿disc￿on￿the￿windshield￿panel￿locking￿drive. Hall￿effect￿sensor,￿cowl￿panel￿locked,￿left:￿The￿hall￿effect￿sensor￿is￿located￿at￿the￿front • left￿of￿the￿soft￿top￿bow￿and￿is￿secured￿at￿the￿convertible￿top￿latch.￿A￿magnet￿installed￿on￿the left￿of￿the￿windshield￿panel￿serves￿as￿a￿counterpart.￿The￿hall￿effect￿sensor￿only￿detects￿the magnet￿when￿the￿LH￿safety￿catches￿are￿closed￿and￿the￿fabric￿soft￿top￿is￿actually￿locked￿to￿the windshield￿on￿the￿left￿and￿not￿only￿appears￿to￿be￿locked￿to￿the￿windshield￿outside￿the￿support. Hall￿effect￿sensor,￿cowl￿panel￿locked,￿right:￿The￿hall￿effect￿sensor￿is￿located￿at￿the￿front • right￿of￿the￿soft￿top￿bow￿and￿is￿secured￿at￿the￿convertible￿top￿latch.￿A￿magnet￿installed￿on￿the right￿of￿the￿windshield￿panel￿serves￿as￿a￿counterpart.￿The￿hall￿effect￿sensor￿only￿detects￿the magnet￿when￿the￿RH￿safety￿catches￿are￿closed￿and￿the￿fabric￿soft￿top￿is￿actually￿locked￿to the￿windshield￿on￿the￿right￿and￿not￿only￿appears￿to￿be￿locked￿to￿the￿windshield￿outside￿the support. G14￿overview￿of￿rear￿convertible￿top￿sensors...
  • Page 39 G14￿Complete￿Vehicle 6.￿Soft￿Top Index Explanation Hall￿effect￿sensor,￿fabric￿soft￿top￿deployed Hall￿effect￿sensor,￿tensioning￿bow￿down￿and￿locked￿on￿right Hall￿effect￿sensor,￿fabric￿soft￿top￿down Hall￿effect￿sensor,￿soft￿top￿bow￿positioned Hall￿effect￿sensor,￿tensioning￿bow￿down￿and￿locked￿on￿left Hall￿effect￿sensor,￿convertible￿top￿lid￿closed￿and￿locked￿on￿right Hall-effect￿sensor,￿convertible￿top￿lid￿open Hall￿effect￿sensor,￿convertible￿top￿lid￿closed￿and￿locked￿on￿left Microswitch￿for￿variable￿convertible￿top￿compartment￿floor￿down Hall￿effect￿sensor,￿fabric￿soft￿top￿deployed:￿The￿hall￿effect￿sensor￿is￿located￿inside￿on￿the • RH￿suspension￿link￿to￿the￿central￿roof￿frame.￿A￿magnet￿is￿located￿on￿the￿outside￿of￿the￿front right￿roof￿frame￿coupler￿arm,￿in￿the￿central￿area.￿If￿the￿fabric￿soft￿top￿is￿deployed,￿the￿hall￿effect sensor￿detects￿the￿magnet. Hall￿effect￿sensor,￿tensioning￿bow￿down￿and￿locked￿on:￿The￿hall￿effect￿sensor￿is￿located • outside￿on￿the￿RH￿toggle￿joint￿for￿the￿tensioning￿bow￿drive.￿A￿magnet￿is￿located￿at￿the￿rear￿of the￿inside￿of￿the￿RH￿balance￿link.￿If￿the￿tensioning￿bow￿is￿completely￿down￿and￿locked￿in￿the upper￿dead￿point￿position,￿the￿hall￿effect￿sensor￿detects￿the￿magnet. Hall￿effect￿sensor,￿fabric￿soft￿top￿down:￿The￿hall￿effect￿sensor￿is￿located￿to￿the￿rear￿on • the￿inside￿of￿the￿RH￿soft￿top￿bearing.￿A￿magnet￿is￿located￿in￿the￿middle￿of￿the￿inside￿of￿the RH￿balance￿link.￿If￿the￿fabric￿soft￿top￿is￿completely￿down,￿the￿hall￿effect￿sensor￿detects￿the magnet. Hall￿effect￿sensor,￿soft￿top￿bow￿positioned:￿The￿hall￿effect￿sensor￿is￿located￿to￿the￿front • on￿the￿inside￿of￿the￿RH￿soft￿top￿bearing.￿A￿magnet￿is￿located￿on￿the￿RH￿toggle￿joint￿for￿the tensioning￿bow￿drive,￿on￿a￿protruding￿arm.￿If￿the￿tensioning￿bow￿is￿completely￿deployed,￿the hall￿effect￿sensor￿detects￿the￿magnet. Hall￿effect￿sensor,￿tensioning￿bow￿down￿and￿locked￿on￿left:￿The￿hall￿effect￿sensor￿is • located￿outside￿on￿the￿LH￿toggle￿joint￿for￿the￿tensioning￿bow￿drive.￿A￿magnet￿is￿located￿at￿the rear￿of￿the￿inside￿of￿the￿LH￿balance￿link.￿If￿the￿tensioning￿bow￿is￿completely￿down￿and￿locked in￿the￿upper￿dead￿point￿position,￿the￿hall￿effect￿sensor￿detects￿the￿magnet. Hall￿effect￿sensor,￿convertible￿top￿lid￿closed￿and￿locked￿on￿right:￿The￿hall￿effect￿sensor •...
  • Page 40 G14￿Complete￿Vehicle 6.￿Soft￿Top Hall-effect￿sensor,￿convertible￿top￿lid￿open:￿The￿hall￿effect￿sensor￿is￿located￿at￿the￿rear • on￿the￿RH￿soft￿top￿lid￿bearing.￿A￿magnet￿is￿located￿in￿the￿central￿area￿of￿the￿convertible top￿lid￿coupler￿arm,￿which￿also￿actuates￿the￿Bowden￿cable￿for￿the￿linkage￿outlet￿flap.￿If￿the convertible￿top￿lid￿is￿completely￿deployed,￿the￿hall￿effect￿sensor￿detects￿the￿magnet. Hall￿effect￿sensor,￿convertible￿top￿lid￿closed￿and￿locked￿on￿left:￿The￿hall￿effect￿sensor￿is • located￿on￿the￿left￿rear￿closing￿bow￿of￿the￿convertible￿top￿lid.￿A￿magnet￿is￿located￿on￿the￿LH locking￿hook￿of￿the￿convertible￿top￿lid.￿If￿the￿convertible￿top￿lid￿is￿closed￿and￿locked￿on￿the￿left, the￿hall￿sensor￿detects￿the￿magnet. Microswitch￿for￿variable￿convertible￿top￿compartment￿floor￿down:￿The￿microswitch￿is • located￿in￿the￿convertible￿top￿compartment￿on￿the￿left.￿When￿the￿hinged￿plate￿of￿the￿variable convertible￿top￿compartment￿floor￿is￿moved￿down￿fully,￿the￿microswitch￿is￿operated￿by￿the hinged￿plate.
  • Page 41 G14￿Complete￿Vehicle 6.￿Soft￿Top System￿wiring￿diagram￿for￿the￿Convertible￿Top￿Module G14￿system￿wiring￿diagram￿for￿the￿Convertible￿Top￿Module￿(CVM)
  • Page 42 G14￿Complete￿Vehicle 6.￿Soft￿Top Index Explanation Hall￿effect￿sensor,￿cowl￿panel￿locked,￿left Hall￿effect￿sensor,￿cowl￿panel￿locked,￿right Power￿distribution￿box,￿front￿right Body￿Domain￿Controller￿(BDC) CAN￿terminator￿(K-CAN2) Front￿right￿power￿window￿regulator￿electronics Rear￿right￿power￿window￿regulator￿electronics Convertible￿Top￿Module￿(CVM) Power￿distribution￿box,￿rear￿right Hydraulic￿unit B+￿distributor￿battery Tailgate￿hydraulic￿cylinder￿sensor Microswitch￿for￿variable￿convertible￿top￿compartment￿floor￿down Hall-effect￿sensor￿for￿soft￿top￿compartment￿cover￿open Hall￿effect￿sensor,￿convertible￿top￿lid￿closed￿and￿locked￿on￿right Wave￿trap￿1 Heated￿rear￿window Wave￿trap￿2 Hall￿effect￿sensor,￿convertible￿top￿lid￿closed￿and￿locked￿on￿right Hall￿effect￿sensor,￿tensioning￿bow￿down￿and￿locked￿on￿right Switch￿block,￿driver's￿door Rear￿left￿power￿window￿regulator￿electronics Hall￿effect￿sensor,￿tensioning￿bow￿down￿and￿locked￿on￿left Hall￿effect￿sensor,￿fabric￿soft￿top￿down Hall￿effect￿sensor,￿soft￿top￿bow￿positioned Hall￿effect￿sensor,￿fabric￿soft￿top￿deployed Convertible￿top￿button Electric￿cowl￿panel￿lock￿drive Hall￿effect￿sensor,￿cowl￿panel￿lock￿drive￿opened Hall￿effect￿sensor,￿cowl￿panel￿lock￿drive￿closed Button,￿tailgate￿activation Front￿left￿power￿window￿regulator￿electronics...

  • Page 43: Headlining

    G14￿Complete￿Vehicle 6.￿Soft￿Top 6.1.5.￿Soft￿top￿cover At￿roll-out,￿the￿soft￿top￿fabric￿is￿available￿in￿both￿variants￿in￿black￿and￿as￿an￿option￿in￿anthracite￿with￿a silver￿effect.￿The￿rear￿window￿with￿rear￿window￿hearing￿is￿a￿fixed￿component￿of￿the￿soft￿top￿fabric. The￿rear￿window￿cannot￿be￿replaced￿separately. 6.1.6.￿Headlining As￿already￿known,￿the￿headlining￿is￿secured￿by￿means￿of￿retaining￿clips,￿springs￿and￿blind￿rivets. The￿headlining￿is￿now￿also￿secured￿to￿the￿soft￿top￿fabric￿in￿four￿positions￿by￿means￿of￿a￿zip￿fastening system.￿This￿can￿be￿opened￿and￿closed￿for￿the￿purposes￿of￿assembly￿and￿disassembly.￿The￿slider￿for opening￿and￿closing￿the￿zip￿fastening￿system￿is￿contained￿among￿the￿spare￿parts￿of￿the￿headlining attachment￿kit.￿Before￿closing,￿ensure￿that￿the￿two￿halves￿to￿be￿zipped￿together￿are￿correctly positioned.￿Marks￿are￿made￿for￿this￿purpose￿and￿must￿be￿aligned￿with￿one￿another.￿The￿soft￿top￿need not￿be￿removed￿in￿order￿to￿remove￿and￿install￿the￿headlining. 6.2.￿Operation￿and￿function 6.2.1.￿Prerequisites The￿following￿conditions￿must￿be￿satisfied￿before￿the￿convertible￿top￿can￿be￿opened￿or￿closed: • Brake￿pedal￿pressed￿(upon￿operation￿via￿the￿convertible￿top￿button) • Driving￿speed￿≤￿50￿km/h￿(31￿mph) • Ambient￿temperature￿>￿-10￿°C￿(>14￿°F)￿(closing￿still￿possible￿in￿lower￿temperatures) • Battery￿voltage￿(open)￿> 10.5 V￿(convertible￿top￿movements￿already￿started￿will￿be￿completed) • Vehicle￿condition￿RESIDING￿or￿DRIVING￿is￿active￿(upon￿operation￿via￿the￿convertible￿top button) • ID￿transmitter￿in￿the￿passenger￿compartment￿(upon￿operation￿via￿the￿convertible￿top￿button) • ID￿transmitter￿in￿the￿vicinity￿(upon￿operation￿via￿the￿ID￿transmitter) • Tailgate￿closed • Variable￿convertible￿top￿compartment￿floor￿folded￿down • Driver's￿door￿closed￿(upon￿operation￿via￿the￿ID￿transmitter) • Opening￿the￿door￿when￿closing￿the￿convertible￿soft￿top￿causes￿the￿operation￿to￿stop (movement￿continues￿if￿the￿convertible￿top￿button￿is￿pressed￿again)
  • Page 44 G14￿Complete￿Vehicle 6.￿Soft￿Top If￿one￿of￿the￿preconditions￿is￿not￿fulfilled,￿the￿opening￿or￿closing￿action￿will￿not￿start. In￿addition,￿a￿Check￿Control￿message￿is￿displayed￿in￿the￿instrument￿cluster. 6.2.2.￿Standard￿operation Standard￿operation￿of￿the￿soft￿top￿is￿performed￿by￿means￿of￿the￿convertible￿top￿button. The￿controller￿is￿situated￿in￿the￿Center￿Operation￿Unit. G14￿convertible￿top￿button Index Explanation Convertible￿top￿button Movement￿of￿the￿soft￿top￿is￿performed￿as￿long￿as￿the￿convertible￿top￿button￿is￿operated. Standard￿operation￿process: • Press￿convertible￿top￿button:￿fabric￿soft￿top￿is￿opened • Pull￿convertible￿top￿button:￿soft￿top￿is￿closed If￿the￿convertible￿top￿button￿is￿released￿during￿the￿opening￿or￿closing￿of￿the￿soft￿top,￿the￿movements of￿the￿soft￿top￿or￿the￿side￿windows￿are￿interrupted￿immediately.￿In￿addition,￿a￿Check￿Control￿message is￿displayed￿in￿the￿instrument￿cluster.￿The￿movements￿are￿resumed￿when￿the￿convertible￿top￿button￿is operated￿again.
  • Page 45 G14￿Complete￿Vehicle 6.￿Soft￿Top Procedure￿for￿opening￿the￿soft￿top G14￿procedure￿for￿opening￿the￿soft￿top Index Explanation The￿fabric￿soft￿top￿and￿the￿convertible￿top￿lid￿are￿closed￿and￿locked. The￿side￿windows￿are￿closed. The￿side￿windows￿are￿open.￿The￿tensioning￿bow￿is￿locked￿and￿deployed. The￿convertible￿top￿lid￿unlocked￿and￿open.￿At￿the￿same￿time,￿the￿soft￿top￿is unlocked￿at￿the￿cowl￿panel. The￿soft￿top￿is￿swung￿in￿the￿rearward￿direction. The￿fabric￿soft￿top￿is￿folded￿and￿stowed￿in￿the￿convertible￿top￿compartment. The￿convertible￿top￿compartment￿lid￿is￿closed￿and￿locked.
  • Page 46 G14￿Complete￿Vehicle 6.￿Soft￿Top Procedure￿for￿closing￿the￿soft￿top G14￿procedure￿for￿closing￿the￿soft￿top Index Explanation The￿fabric￿soft￿top￿and￿side￿windows￿are￿open.￿The￿convertible￿top￿lid￿is closed￿and￿locked. The￿convertible￿top￿lid￿unlocked￿and￿open.￿The￿soft￿top￿is￿lifted￿out￿of￿the convertible￿top￿compartment.￿If￿the￿side￿windows￿are￿closed,￿they￿are￿partially lowered￿beforehand. The￿soft￿top￿is￿folded￿and￿swung￿towards￿the￿front. The￿tensioning￿bow￿is￿deployed,￿the￿fabric￿soft￿top￿is￿lowered￿onto￿the windshield￿and￿the￿convertible￿top￿lid￿is￿closed. The￿convertible￿top￿lid￿is￿locked.￿At￿the￿same￿time,￿the￿fabric￿soft￿top￿is￿locked to￿the￿windshield￿panel.￿The￿tensioning￿bow￿is￿then￿lowered￿and￿deactivated. The￿tensioning￿bow￿is￿moved￿to￿the￿upper￿dead￿point￿position￿and￿locked. The￿side￿windows￿are￿closed.
  • Page 47 G14￿Complete￿Vehicle 6.￿Soft￿Top 6.3.￿Notes￿for￿Service 6.3.1.￿Adjusting￿procedures G14￿soft￿top￿bearing￿adjustment￿possibilities Index Explanation Adjustment￿screw￿(adjustment￿in￿x￿direction) Convertible￿top￿bearing Lock￿nut Washer Barrel￿screw￿(adjustment￿in￿z￿direction) Threaded￿bolt To￿adjust￿the￿fabric￿soft￿top,￿all￿adjusting￿nuts￿and￿securing￿nuts￿on￿the￿main￿soft￿top￿bearings￿must be￿unscrewed￿and￿the￿washers￿removed.￿The￿fabric￿soft￿top￿is￿adjusted￿in￿the￿z￿direction￿by￿turning the￿barrel￿screws.￿The￿barrel￿screws￿have￿an￿external￿thread￿and￿can￿be￿turned￿inside￿the￿main￿soft￿top bearings￿using￿a￿special￿tool.￿The￿elongated￿holes￿on￿the￿main￿soft￿top￿bearings￿allow￿adjustment￿of the￿soft￿top￿in￿the￿x￿and￿y￿directions.￿Consequently,￿the￿soft￿top￿can￿be￿adjusted￿horizontally￿around the￿threaded￿bolts.
  • Page 48 G14￿Complete￿Vehicle 6.￿Soft￿Top When￿adjusting,￿pay￿attention￿to￿the￿following: • To￿simplify￿adjustment￿when￿reinstalling￿the￿fabric￿soft￿top,￿it￿makes￿sense￿to￿mark￿the position￿of￿the￿main￿fabric￿soft￿top￿bearings￿on￿the￿body￿before￿removing￿the￿soft￿top.￿After completing￿the￿repairs￿or￿when￿replacing￿the￿fabric￿soft￿top,￿the￿convertible￿top￿main￿bearings can￿be￿realigned￿with￿the￿markings. • At￿the￿adjustment￿screw￿(y￿direction),￿the￿dimension￿can￿be￿roughly￿measured￿before removing￿the￿fabric￿soft￿top￿before￿being￿transferred￿and￿adjusted￿after￿assembly. • At￿the￿barrel￿screws￿(z￿direction),￿the￿dimension￿can￿be￿roughly￿measured￿before￿removing￿the fabric￿soft￿top￿before￿being￿transferred￿and￿adjusted￿after￿assembly. After￿assembly,￿the￿position￿of￿the￿fabric￿soft￿top￿on￿the￿windshield￿panel￿must￿be￿checked.￿The￿LH and￿RH￿windshield￿panel￿guide￿pins￿on￿the￿fabric￿soft￿top￿should￿be￿inserted￿in￿the￿middle￿of￿the￿base plate￿guide￿bushing￿on￿the￿windshield￿panel.￿If￿this￿is￿not￿the￿case,￿the￿entire￿fabric￿soft￿top￿must￿be adjusted￿in￿the￿corresponding￿direction￿on￿the￿soft￿top￿bearings. 6.3.2.￿Manual￿closing￿of￿the￿fabric￿soft￿top If￿necessary,￿the￿fabric￿soft￿top￿can￿be￿closed￿manually.￿This￿section￿will￿describe￿the￿basic￿procedure. However,￿if￿the￿fabric￿soft￿top￿is￿closed￿manually,￿the￿steps￿in￿the￿repair￿instructions￿or￿owner’s handbook￿must￿be￿observed￿in￿the￿prescribed￿sequence.￿The￿special￿tool￿required￿can￿be￿found￿in￿the soft￿top￿tool￿set￿in￿the￿rear￿right￿of￿the￿trunk￿in￿a￿foam￿box￿on￿the￿convertible￿top￿hydraulics￿unit. Before￿closing￿the￿fabric￿soft￿top￿manually,￿the￿side￿windows￿must￿be￿completely￿lowered.￿PARK￿must then￿be￿selected￿to￿ensure￿that￿the￿hydraulic￿system￿is￿depressurized. G14￿soft￿top￿tool...
  • Page 49 G14￿Complete￿Vehicle 6.￿Soft￿Top Index Explanation Allen￿key￿with￿extension￿tube Tensioning￿bow￿service￿tool There￿are￿two￿alternatives￿to￿open￿the￿fabric￿soft￿top￿manually.￿One￿is￿intended￿for￿the￿customer￿and is￿described￿in￿the￿owner’s￿handbook.￿The￿other￿is￿intended￿for￿the￿workshops￿and￿the￿BMW￿road assistance￿vehicle￿and￿is￿described￿in￿the￿ISTA￿workshop￿system. Initially,￿the￿convertible￿top￿lid￿is￿manually￿unlocked￿so￿that￿it￿can￿be￿opened.￿Before￿opening￿the convertible￿top￿lid,￿the￿tailgate￿must￿be￿closed. When￿closing￿the￿tailgate,￿the￿convertible￿top￿lid￿must￿at￿the￿same￿time￿be￿pressed￿downwards laterally￿at￿the￿rear￿edge￿on￿both￿sides￿of￿the￿vehicle. If￿the￿convertible￿top￿lid￿is￿unlocked,￿the￿tailgate￿cannot￿be￿opened. After￿it￿has￿been￿taken￿out￿of￿the￿convertible￿top￿compartment￿and￿swung￿forwards,￿the￿fabric￿soft￿top is￿then￿locked￿to￿the￿windshield￿panel.￿The￿allen￿key￿from￿the￿vehicle’s￿soft￿top￿tool￿set￿is￿used￿for￿this purpose.￿Both￿procedures￿are￿identical￿up￿to￿this￿point. In￿the￿customer￿version,￿the￿tensioning￿bow￿is￿not￿moved￿to￿the￿upper￿dead￿point￿position￿and￿is￿thus not￿locked￿mechanically.￿Consequently,￿the￿soft￿top￿end￿is￿not￿completely￿closed￿and￿there￿is￿a￿light gap￿between￿the￿tensioning￿bow￿and￿the￿convertible￿top￿lid.￿In￿dry￿weather,￿the￿vehicle￿should￿be taken￿to￿the￿nearest￿service￿partner.￿In￿this￿case,￿a￿maximum￿speed￿of￿80 km/h￿(50￿mph)￿must￿not￿be exceeded￿(draught￿felt￿inside￿the￿vehicle).￿In￿wet￿weather,￿the￿journey￿must￿not￿be￿continued￿as￿this could￿lead￿to￿water￿entering￿the￿passenger￿compartment.￿The￿BMW￿service￿number￿should￿therefore be￿called￿so￿that￿the￿BMW￿road￿assistance￿service￿can￿close￿and￿lock￿the￿fabric￿soft￿top. For￿the￿workshop￿and￿road￿assistance￿service￿variant,￿the￿LH￿and￿RH￿tensioning￿bow￿is￿moved￿to￿the upper￿dad￿point￿position￿using￿the￿service￿tool￿from￿the￿soft￿top￿tool￿box￿and￿mechanically￿locked. Both￿variants￿of￿the￿soft￿top￿manual￿operation￿must￿always￿be￿carried￿out￿by￿two￿people. The￿fabric￿soft￿top￿and￿the￿convertible￿top￿lid￿must￿always￿be￿moved￿in￿parallel￿and￿simultaneously￿on both￿sides. When￿locking￿to￿the￿windshield￿panel,￿one￿person￿pushes￿the￿front￿bow￿downwards￿while￿the￿other person￿closes￿the￿windshield￿panel￿lock. When￿locking￿the￿tensioning￿bow,￿one￿person￿presses￿the￿tensioning￿bow￿downwards￿on￿the￿relevant side￿while￿the￿other￿person￿moves￿the￿tensioning￿bow￿to￿the￿upper￿dead￿point￿position￿on￿the￿left￿and right￿using￿the￿another￿special￿tool￿from￿the￿soft￿top￿tool￿box￿and￿locks￿it.

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