BMW F97 Technical Training Manual page 29

F97/F98￿Complete￿Vehicle
4.￿Powertrain
Effect
• Launch￿Control￿automatically￿shifts￿up￿using￿the￿shortest￿possible￿gearshift￿times￿and
performance-optimized￿shift￿points￿as￿long￿as￿the￿driver￿keeps￿the￿accelerator￿pedal￿fully
depressed.
• The￿start￿flag￿in￿the￿instrument￿cluster￿remains￿active.
A￿renewed￿Launch￿Control￿start￿is￿possible￿as￿long￿as￿the￿transmission￿oil￿temperature￿satisfies￿the
preconditions￿for￿this.
Automatic￿deactivation
• The￿driver￿leaves￿(even￿if￿only￿briefly)￿the￿accelerator￿pedal￿full-load￿range￿during￿acceleration.
A￿manual￿intervention￿in￿the￿automatic￿upshift,￿for￿example￿via￿the￿gearshift￿paddles￿on￿the￿steering
wheel￿or￿the￿gear￿selector￿lever,￿does￿not￿interrupt￿the￿Launch￿Control￿process.
If￿one￿of￿these￿preheating/precooling￿conditions￿is￿breached,￿it￿is￿not￿possible￿to￿activate￿the￿Launch
Control.
Also￿at￿excessive￿transmission￿oil￿temperature￿(e.g.￿repeat￿Launch￿Control￿or￿race-like￿start),￿activation
is￿blocked￿up￿until￿an￿acceptable￿temperature￿threshold￿is￿reached.
The￿start￿flag￿goes￿out￿with￿every￿deactivation￿and￿the￿automatic￿forced￿upshift￿is￿cancelled.
Premature￿wear￿occurs￿as￿a￿result￿of￿the￿high￿load￿of￿the￿vehicle￿with￿use￿of￿the￿launch￿control.
4.2.5.￿Emergency￿gearbox￿release
A￿mechanical￿emergency￿transmission￿release￿is￿available￿and￿can￿be￿accessed￿through￿the￿vehicle
underbody.￿In￿addition,￿an￿electronic￿emergency￿gearbox￿release￿is￿implemented￿as￿it￿is￿in￿automatic
transmissions￿of￿the￿BMW￿AG￿vehicles.￿If￿the￿vehicle￿needs￿to￿be￿towed,￿the￿guidance￿in￿the￿owner's
manual￿for￿the￿vehicle￿must￿be￿followed.
Release￿is￿possible￿if￿the￿starter￿motor￿can￿crank￿the￿engine.￿Before￿the￿parking￿lock￿is￿released,￿the
parking￿brake￿must￿be￿applied￿in￿order￿to￿prevent￿the￿vehicle￿rolling￿away.
Sequence
1.
2.
3.
4.
Precondition/Action
Engage￿selector￿lever￿position￿N.
Press￿and￿hold￿the￿brake.
Press￿the￿start/stop￿button￿(the￿starter￿motor￿must￿start￿up￿audibly).
Keep￿the￿start/stop￿button￿pressed.
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