Audi A6 Quattro 2008 Maintenance Procedures

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01 - MAINTENANCE

ENGINE OVERVIEW

NOTE:

Some engines listed below are for European models.

Gasoline engines

Engine code

Emissions

Summary of Contents for Audi A6 Quattro 2008

Page 1 2008 Audi A6 Quattro 2008 Audi A6 Quattro Maintenance Maintenance Procedures Maintenance Maintenance Procedures Maintenance Maintenance Procedures 01 - MAINTENANCE ENGINE OVERVIEW NOTE: Some engines listed below are for European models. Gasoline engines Engine code Emissions EU IV EU IV...
Page 2: Delivery Inspection
2008 Audi A6 Quattro Maintenance Maintenance Procedures Turbocharger Emissions test after 3.5,7,9, etc. years * 91 RON standard unleaded gasoline is permissible, however with decreased power output. * 95 RON Super unleaded gasoline is permissible, however with decreased power output.
Page 3: Inspection Service
2008 Audi A6 Quattro Maintenance Maintenance Procedures OIL CHANGE SERVICE For engine oil specifications and capacities please refer to --> ServiceNet; Additional Information; Fluid Capacity Chart for appropriate model and year Also, for appropriate service intervals refer to --> ServiceNet; Maintenance Schedule for appropriate model...
Page 4 2008 Audi A6 Quattro Maintenance Maintenance Procedures Heated seats and rear seat bench, heated steering wheel FINAL DRIVE (AUTOMATIC TRANSMISSION): CHECK OIL LEVEL, ADD OIL IF NECESSARY Automatic transmission --> - 39 - FINAL DRIVE, DIFFERENTIAL for 6 SPD. AUTOMATIC TRANSMISSION 09E ALL...
Page 5 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 1: Connecting Data Link Connector (DLC) Courtesy of VOLKSWAGEN UNITED STATES, INC. Connect VAS 5051/5052 Guided Fault Finding or Guided Functions Go to - function/component selection Service work Energy manager, activate/deactivate transport mode...
Page 6 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 2: Connecting Data Link Connector (DLC) Courtesy of VOLKSWAGEN UNITED STATES, INC. Connect VAS 5051/5052 Guided functions Select brand and model Service work A-battery, checking at delivery inspection Follow the instructions. NOTE: If tester display shows charge or replace battery, see -->...
Page 7 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 3: Identifying Luggage Compartment Cargo Floor And Spare Wheel Cover Courtesy of VOLKSWAGEN UNITED STATES, INC. Avant Remove luggage compartment cargo floor - 1 - and spare wheel cover - 2 -.
Page 8 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 5: Releasing Retaining Clips With A Screwdriver And Removing Battery Ground Cover Courtesy of VOLKSWAGEN UNITED STATES, INC. Release retaining clips - arrows - with a screwdriver - 2 - and remove battery ground cover - 1 -.
Page 9 2008 Audi A6 Quattro Maintenance Maintenance Procedures eye color display. If batteries are equipped with plugs for production reasons, these are covered with plastic film. Before performing visual check, carefully and lightly knock magic eye with handle of a screwdriver.
Page 10 2008 Audi A6 Quattro Maintenance Maintenance Procedures Check running surfaces and side walls for damage, remove foreign materials, if necessary. Check tires for scuffing, one sided wear, porous side walls, cuts and fractures. WARNING: Report any damage to customer and mark repair order accordingly.
Page 11 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 8: Identifying Tire Pressure Values For Summer Tires On Sticker On Inside Of Fuel Tank Flap Courtesy of VOLKSWAGEN UNITED STATES, INC. Tire pressure values for summer tires are on the sticker on the inside of the fuel tank flap.
Page 12: Brake Fluid, Changing
2008 Audi A6 Quattro Maintenance Maintenance Procedures BRAKE FLUID, CHANGING NOTE: Use only new Original VW / Audi brake fluid, see ETKA Special tools, testers, and measuring equipment Fig. 10: VAS 5234 Brake Filler And Bleeder Unit Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 13 2008 Audi A6 Quattro Maintenance Maintenance Procedures from the air. Always store brake fluid in air-tight containers. Wash off brake fluid spillage using plenty of water. Observe waste disposal regulations! Observe operating instructions for VAS 5234 or for V.A.G 1869 ! Fig.
Page 14 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 13: Connecting Suction Hose From VAS 52.4 Or V.A.G 1869 To Tube Of Brake Fluid Reservoir Courtesy of VOLKSWAGEN UNITED STATES, INC. Connect suction hose from VAS 5234 or V.A.G 1869 to tube - 1 - of brake fluid reservoir.
Page 15 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 14: Connecting Suction Hose From VAS 52.4 Or V.A.G 1869 To Tube Of Brake Fluid Reservoir Courtesy of VOLKSWAGEN UNITED STATES, INC. Install adapter - 1 - to brake fluid reservoir. Connect filler hose - 2 - from VAS 5234 or V.A.G 1869 to adapter.
Page 16 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 16: Connecting Bottle Bleeder Hose Courtesy of VOLKSWAGEN UNITED STATES, INC. Connect extractor bleeder hose - 1 - to rear right bleeder screw, open bleeder screw and allow about 200 ml to flow out. Close bleeder screw.
Page 17 2008 Audi A6 Quattro Maintenance Maintenance Procedures Right rear 200 ml Left rear 200 ml Right front 200 ml Left front 200 ml * See footnote 1.000 ml Total amount * Including brake fluid extracted from brake fluid reservoir and quantity from clutch slave cylinder.
Page 18 2008 Audi A6 Quattro Maintenance Maintenance Procedures Check brake hoses for porosity, bubbles and cracks. Check brake hoses and lines for chafing. Check all brake line connections for secure mounting, leaks, or corrosion. WARNING: Malfunctions found must be rectified (repair measure).
Page 19 Visual inspection without removing wheels BRAKE FLUID LEVEL, DEPENDENT ON LINING WEAR: CHECK NOTE: Use only new Original VW / Audi brake fluid, see ETKA WARNING: Brake fluid is poisonous. Due to its caustic nature, it must also never be brought into contact with paint.
Page 20 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fluid level must be at MAX mark NOTE: To prevent the brake fluid from overflowing from the reservoir, the level must not be over the MAX mark. Inspection service When driving, fluid level drops slightly from use and automatic brake pad adjustment.
Page 21 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 22: Connecting Data Link Connector (DLC) Courtesy of VOLKSWAGEN UNITED STATES, INC. Connect VAS 5051/5052 Vehicle - Self-diagnosis Gateway - Installation list Read control module with stored DTC memory. Correct relevant malfunctions with customers approval.
Page 22 2008 Audi A6 Quattro Maintenance Maintenance Procedures Remove screws or quick-release connectors - 1 - and - 2 - and remove noise insulation. Installing Installation is reverse of removal. On vehicles with auxiliary heater, note the following: After installing noise insulation, check location of exhaust pipe - A - ; a seal - B - must be installed between exhaust pipe and noise insulation.
Page 23 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 25: Identifying Lock Nut Courtesy of VOLKSWAGEN UNITED STATES, INC. Make sure lock nut - 1 - is tightened to 40 Nm. All control arms Fig. 26: Identifying Ball Joint Boots Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 24 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 27: Identifying Bearing Housing And Control Arm Courtesy of VOLKSWAGEN UNITED STATES, INC. With unloaded wheels, check relative movement of wheel bearing housing to control arm. By raising and lowers the wheels several times by hand - arrow - the relative movement between wheel bearing housing and control arm can be observed.
Page 25: Interior Equipment
2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 28: Identifying Fluid Level Range Courtesy of VOLKSWAGEN UNITED STATES, INC. Check fluid level: Fluid level must be in - A - range. Fluid at operating temperature (approx. 176 ° F [80 ° C]): Remove cover.
Page 26 2008 Audi A6 Quattro Maintenance Maintenance Procedures Sub-surface cracks (cracks, core ruptures, cross sectional breaks) Layer separation (top layer, cord strands) Base break-up Fraying of cord strands Flank wear (material wear, frayed flanks, flank brittleness -glassy flanks-, surface cracks) Traces of oil and grease Check guide rollers and tensioner rollers and replace if necessary.
Page 27 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 29: Identifying A/C System Components Courtesy of VOLKSWAGEN UNITED STATES, INC. Check whether 72 ° F (22 ° C ) is set in both display fields. Set temperature as follows, if necessary: Press the "AUTO"...
Page 28 2008 Audi A6 Quattro Maintenance Maintenance Procedures VW 774 F (purple color). G 12 Plus can be mixed with the previous coolant additives G 11 and G 12 (red). Ensure that the system is replenished only with G12 Plus (due to its positive properties).
Page 29 2008 Audi A6 Quattro Maintenance Maintenance Procedures T10007 (operating instructions). Fig. 32: Identifying Refractometer Scales Courtesy of VOLKSWAGEN UNITED STATES, INC. The scale - 1 - of the refractometer is designed for coolant additives G 12; G12 Plus and G11.
Page 30 2008 Audi A6 Quattro Maintenance Maintenance Procedures Check coolant additive concentration after test drive again. Checking coolant level and adding coolant if necessary Check coolant level in expansion tank with engine cold. Fig. 33: Checking Coolant Level Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 31 2008 Audi A6 Quattro Maintenance Maintenance Procedures Especially in countries with tropical climates or when vehicle is driven under heavy load, the coolant improves the engine reliability by its increased boiling point. The coolant concentration must not be reduced by adding water, even during the warmer season.
Page 32 2008 Audi A6 Quattro Maintenance Maintenance Procedures Courtesy of VOLKSWAGEN UNITED STATES, INC. Loosen air duct intake hose - 3 - and connections (crankcase ventilation, mass air flow sensor). Open clamps - 1 - with screwdriver and remove air duct.
Page 33 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 37: Disconnecting Mass Air Flow (MAF) Sensor G70 Electrical Harness Connector Courtesy of VOLKSWAGEN UNITED STATES, INC. Open tension clamps - arrows - and remove upper part of air filter housing with Mass Air Flow Sensor G70.
Page 34 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 39: Identifying Bolts And Left Air Guide Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove bolts - arrows - and remove left air guide. Fig. 40: Identifying Hose Clamps And Bolts Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 35 2008 Audi A6 Quattro Maintenance Maintenance Procedures Disconnect electrical connector - arrow - on Mass Air Flow (MAF) Sensor 2 G246. Remove left upper part of air filter housing. Remove air filter insert. Remove right air filter housing: Fig. 42: Identifying Vacuum Hoses And Bolts For Right Air Guide Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 36 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 44: Identifying Electrical Connector On Mass Air Flow Sensor Courtesy of VOLKSWAGEN UNITED STATES, INC. Disconnect electrical connector - arrow - on Mass Air Flow (MAF) Sensor G70. Remove right upper part of air filter housing.
Page 37 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 45: Identifying Water Drain Courtesy of VOLKSWAGEN UNITED STATES, INC. Clean water drain (small hole in bottom part of air filter housing - arrow - ), blow out with compressed air if necessary.
Page 38 2008 Audi A6 Quattro Maintenance Maintenance Procedures Clean air filter housing (upper and lower parts) of salt residue, dirt or leaves (clean with vacuum, if necessary). Check mass air flow sensor and intake hose (clean air side) for salt residue, dirt and leaves.
Page 39 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 46: Engine Cover Removal Spots Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove engine cover with both hands at places - 1 - and then - 2 -. (do not remove engine cover abruptly or by one side).
Page 40 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 47: Identifying Old Oil Collecting And Extracting Device V.A.G 1782 Courtesy of VOLKSWAGEN UNITED STATES, INC. Oil extractor 1782 Tension band 2171-1 Fig. 48: Identifying Oil Filter Wrench VAS 3417 Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 41 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 50: Identifying Sealing Ring On Cap Courtesy of VOLKSWAGEN UNITED STATES, INC. Sealing ring on cap, replacing Remove sealing ring at pull tab - arrow A - from cap - 1 -.
Page 42 2008 Audi A6 Quattro Maintenance Maintenance Procedures Install coolant reservoir. Remove noise insulation. --> Noise insulation, removing Open oil drain plug on oil pan or extract engine oil. Install oil drain plug. NOTE: Oil drain plug is installed without seal.
Page 43 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 53: Identifying Oil Filter Insert, O-Ring, And Oil Filter Cover Courtesy of VOLKSWAGEN UNITED STATES, INC. Replace oil filter insert. - 1 -. NOTE: Observe waste disposal regulations! Install new O-ring - 2 - and lubricate lightly.
Page 44 2008 Audi A6 Quattro Maintenance Maintenance Procedures Remove noise insulation --> Noise insulation, removing Open oil drain plug and drain engine oil. Install oil drain plug with new gasket. Fig. 54: Removing Rear Engine Cover Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 45 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 56: Identifying Filter Component, Cover, And O-Rings Courtesy of VOLKSWAGEN UNITED STATES, INC. Loosen cover - 1 - AF 32. Remove filter component - 3 -. Replace O-rings - 2 - and - 4 - and filter element - 3 -.
Page 46: Engine: Oil Level, Checking
2008 Audi A6 Quattro Maintenance Maintenance Procedures The full oil pressure achieved and the engine can be accelerated only when the warning light extinguishes All: Check engine oil level --> Engine: Oil level, checking. ENGINE: OIL LEVEL, CHECKING NOTE: Oil temperature at least 140 ° F (60 ° C).
Page 47: Navigation: Eject Button, Unlocking
2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 58: Identifying Max Oil Level Marking Courtesy of VOLKSWAGEN UNITED STATES, INC. NOTE: Oil level must not exceed - a - mark on dipstick. NAVIGATION: EJECT BUTTON, UNLOCKING Follow these steps in sequential order.
Page 48 2008 Audi A6 Quattro Maintenance Maintenance Procedures J401 - Navigation, Eject button, locking/unlocking Now follow guided program INTERIOR MONITORING, CHECKING FUNCTION The function of the ultra-sonic interior monitoring is checked as follows: Open side window approx. 10 cm (4 in.).
Page 49 2008 Audi A6 Quattro Maintenance Maintenance Procedures Vehicle: Moving off line when traveling straight ahead (level road) Imbalance: Wheels, drive shafts Wheel bearings: Noises Engine: Hot starting behavior WHEEL BOLTS: TIGHTEN TO CORRECT TORQUE SETTING Center cap Fig. 60: Identifying Removal Hook Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 50 2008 Audi A6 Quattro Maintenance Maintenance Procedures could then become loose, even if tightened to specified torque. Before installing wheels, check for rust/corrosion in wheel bolt seats and contact surfaces between rims and hubs, removing if necessary. Otherwise, the wheel bolts can lose tension after installation and the rim can come loose.
Page 51 2008 Audi A6 Quattro Maintenance Maintenance Procedures Courtesy of VOLKSWAGEN UNITED STATES, INC. Windshield spray jet setting NOTE: The adjustment dimensions give values for a driving vehicle, that is, when parked, the spray pattern will shift slightly. Mark the 4 points on the windshield with a water-soluble pen: Dimension - a - = 255 mm.
Page 52 2008 Audi A6 Quattro Maintenance Maintenance Procedures The following test and adjustment instructions are applicable to all countries. National guidelines or regulations of the country must be observed. Check and adjustment conditions Tire pressure OK. Lenses must not be damaged or dirty.
Page 53 2008 Audi A6 Quattro Maintenance Maintenance Procedures Vehicle and headlamp adjuster must be aligned. Ensure headlight adjuster is about 30 cm in front of headlight. Inclination must be set. Inclination measurements are stamped in "%" at top of headlamp. The headlamps must be adjusted according to these measurements.
Page 54 2008 Audi A6 Quattro Maintenance Maintenance Procedures Select "Guided Fault Finding" Enter vehicle information; all control modules are interrogated. Press the following selections in the order shown: Go To Functions and component selection Body Electrical Equipment 01 - On Board Diagnostic (OBD) capable systems...
Page 55 2008 Audi A6 Quattro Maintenance Maintenance Procedures surface Break-away point - 2 - between left horizontal part and rising part on right of light-dark border must run vertically through central point - 3 -. Bright core of light beam must be right of vertical line...
Page 56 2008 Audi A6 Quattro Maintenance Maintenance Procedures Left headlight adjustment screws: Placement on right headlight is similar. To adjust height, turn adjustment screws - 1 - and - 2 - with same number of revolutions. To adjust laterally, turn only adjustment screw - 2 -.
Page 57 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 69: Lamp Range Adjustment Screw Courtesy of VOLKSWAGEN UNITED STATES, INC. To adjust the lamp range, turn the adjustment screw - arrow -. Lateral adjustment is not possible. Other additional headlamps: Accessory auxiliary headlamp systems must be checked and adjusted according to the guidelines valid for them.
Page 58 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 70: Identifying Hex Head Nuts Courtesy of VOLKSWAGEN UNITED STATES, INC. Pry cover off wiper arm with screwdriver. Loosen hex head nuts - arrows - a few turns. Loosen wiper arm by tilting wiper axis slightly, remove hex head nuts and remove wiper arm.
Page 59 2008 Audi A6 Quattro Maintenance Maintenance Procedures Position wiper arm with wiper blade attached on wiper axle and adjust wiper arm on windshield as follows: Dimension - a - = 5 to 15 mm. Dimension - b - = 30 to 40 mm.
Page 60 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 73: Identifying Spray Jets And Hex Head Nuts Courtesy of VOLKSWAGEN UNITED STATES, INC. Carefully remove spray jets - 2 -. Loosen hex head nuts - 1 - a few turns. Loosen wiper arm by tilting wiper axle slightly.
Page 61 2008 Audi A6 Quattro Maintenance Maintenance Procedures HEADLIGHTS: AIMING USING HELLA UNIVERSAL BEAMSETTER IV Service Align vehicle headlamps using the VAS 5107 (Hella Universal Beamsetter IV) and the following procedure: Additional instructions and diagrams Instruction Manual for the Hella Beamsetter Series IV Position vehicle on a flat floor surface that meets the following (ISO 10640) specifications: Fig.
Page 62 2008 Audi A6 Quattro Maintenance Maintenance Procedures Without moving the Beamsetter, slide Broad-band sight toward center of vehicle (Broad-band sight can also be moved up and down for a better position). Use Broad-band sight to make final alignment of Beamsetter box to vehicle by: Loosening hand-wheel that locks column in place.
Page 63 2008 Audi A6 Quattro Maintenance Maintenance Procedures Switch headlights ON in high beam position. Realign Beamsetter box with the high beam headlight if necessary. Set Beamsetter "Scaled wheel" to 0%. Fig. 77: Identifying Beamsetter "Scaled Wheel" At 0% Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 64 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 78: Identifying Hella Universal Beamsetter IV VAS 5107 Scaled Wheel At 1.4% Courtesy of VOLKSWAGEN UNITED STATES, INC. Adjust fog lamp so the top of the beam pattern aligns with the centerline of the target grid on the beam pattern screen.
Page 65 2008 Audi A6 Quattro Maintenance Maintenance Procedures Removing Bring wiper into service position Owners manual. Lift wiper arm off of windshield. Press retaining clips together - arrow 1 -. Slide wiper blade off wiper arm - arrow 2 -. Remove wiper blade.
Page 66 2008 Audi A6 Quattro Maintenance Maintenance Procedures NOTE: If the door locks do not operate freely, they must be removed, cleaned and lubricated. SNOW SCREEN, CLEANING Remove air filter intake duct. Fig. 81: Locating Snow Screen Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 67 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 82: Connecting Data Link Connector (DLC) Courtesy of VOLKSWAGEN UNITED STATES, INC. Connect VAS 5051/5052 Guided Fault Finding or Guided Functions Go to - function/component selection Service work Combination Processor, reset WIV...
Page 68 2008 Audi A6 Quattro Maintenance Maintenance Procedures NOTE: It is necessary to change oil quality if changed between inspection or LongLife Service. Inspection Service = Oil quality 1 LongLife Service = Oil quality 2 WIV = Wartungsintervall - Verlangerung (Maintenance Interval Extension)
Page 69 2008 Audi A6 Quattro Maintenance Maintenance Procedures DUST AND POLLEN FILTER: REPLACING NOTE: The dust and pollen filter consists of two identically constructed filter elements. When installing, observe correct installation position (filter flow- through direction is indicated with arrows). Clean plenum chamber after replacing dust and pollen filter. Pay special attention to area under air intake unit.
Page 70 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 83: Identifying Lid For Lower Glove Compartment Cover Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove lid - A - from lower glove compartment cover - B -. NOTE: The lid - A - is held by 4 latches on bottom glove compartment cover - B -.
Page 71 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 85: Identifying Dust And Pollen Filter Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove first part of dust and pollen filter - A - from air conditioning unit. NOTE: Two identically constructed filter inserts are installed one on top of the other in the air conditioning unit.
Page 72 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 87: Identifying Catches And Pollen Filter Cover For Air Conditioning Unit Courtesy of VOLKSWAGEN UNITED STATES, INC. Check seal position - C - in groove - D -. Install cover - A -. Ensure proper seating in mount - E - and latch - B -.
Page 73 2008 Audi A6 Quattro Maintenance Maintenance Procedures Remove protection devices - A -. NOTE: It is not necessary to remove the wheels Remove tag on rearview mirror Removing rear axle bumper protection devices Release rear axle (for example, put vehicle on lift) Fig.
Page 74 2008 Audi A6 Quattro Maintenance Maintenance Procedures Lubricate door arrester only on lubrication places indicated - arrows -. Lubricant: "G 052 778 A2" Lubricate lock cylinder. Lubricant: "G 052 778 A2" UNDERBODY, VISUAL INSPECTION FOR DAMAGE When performing visual inspection, check for damage to underbody, wheel housings and rocker panels.
Page 75 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 91: Connecting Data Link Connector (DLC) Courtesy of VOLKSWAGEN UNITED STATES, INC. Connect VAS 5051/5052 Guided Fault Finding or Guided Functions Go to - function/component selection Service work Activate or deactivate air suspension transport mode...
Page 76 2008 Audi A6 Quattro Maintenance Maintenance Procedures TIMING BELT: REPLACING 6-cylinder engine --> - 13 - ENGINE - CRANKSHAFT, CYLINDER BLOCK CLOCK, SETTING NOTE: See MMI owners manual SPARK PLUGS: REPLACING Special tools, testers and auxiliary items required Fig. 93: Identifying Spark Plug Wrench 3122 B Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 77 2008 Audi A6 Quattro Maintenance Maintenance Procedures pull this from spark plug. Placing on bottom rib can cause damage. NOTE: Plug designation --> - 28 - IGNITION SYSTEM for 3.2 V6 4V FUEL INJECTION IGNITION, ENGINE CODE(S): BKH 28 - IGNITION/GLOW PLUG SYSTEM for 4.2 LITER 8-CYL. 5V ENGINE MECHANICAL ENGINE CODE(S): BAT, BNK 28 - IGNITION/GLOW PLUG SYSTEM for 4.2 LITER V8 4V FUEL...
Page 78 2008 Audi A6 Quattro Maintenance Maintenance Procedures NOTE: Push ignition coils by hand into intended resources in cylinder head cover. Left cylinder bank Remove coolant reservoir and lay aside. Fig. 96: Identifying Bolts, Connector, And Ignition Coil Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 79 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 97: Identifying Ignition Coil Puller T40039 Courtesy of VOLKSWAGEN UNITED STATES, INC. Puller T40039 Fig. 98: Removing Rear Engine Cover Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove rear engine cover - 2 -.
Page 80 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 99: Identifying Vacuum Hoses And Bolts For Right Air Guide Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove bolts - arrows - and remove left air duct. Fig. 100: Identifying Hose Clamps And Electrical Connector Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 81 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 101: Identifying Bolts And Coolant Hoses Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove bolts - 2 - and - 3 - and lay aside coolant reservoir with connected coolant hoses - 4 - and - 5 -.
Page 82 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 104: Identifying Bolts And Left Air Guide Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove bolts - arrows - and remove left air duct. Fig. 105: Identifying Hose Clamps For Left Air Guide Hose Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 83 2008 Audi A6 Quattro Maintenance Maintenance Procedures Remove bolts - 1 - and - 3 -. Fig. 107: Removing Ignition Coils Using Ignition Coil Puller T40039 Courtesy of VOLKSWAGEN UNITED STATES, INC. Pull ignition coils about 30 mm out of spark plug shaft with Puller T40039.
Page 84 2008 Audi A6 Quattro Maintenance Maintenance Procedures The vehicle data sticker is in the customers service schedule and in the vehicle in the spare wheel recess or on the luggage compartment floor. Fig. 108: Identifying Vehicle Data Sticker Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 85 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 110: Identifying Engine Number Stamped On Engine Block Courtesy of VOLKSWAGEN UNITED STATES, INC. 8-cyl. gasoline engine Fig. 111: Identifying Engine Number Stamped On Engine Block Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 86 2008 Audi A6 Quattro Maintenance Maintenance Procedures The vehicle is not in driveable condition when suspensions blocks are installed. The vehicle can only be moved. When moving steering wheel from center position, do not turn more than 3/4 left or right.
Page 87 2008 Audi A6 Quattro Maintenance Maintenance Procedures Stand (commercially available) Onboard vehicle jack Floor jack (commercially available) Installing suspension blocks on front axle Workshop arrangement Right vehicle side: Supporting plate: T40082/2 Rubber block T40082/4 Left vehicle side: Supporting plate: T40082/1 Rubber block T40082/3 Bring front wheels into straight position.
Page 88 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 115: Lift Vehicle From Ground With Onboard Vehicle Jack Courtesy of VOLKSWAGEN UNITED STATES, INC. Lift vehicle with Onboard vehicle jack / Floor jack until wheel is clear of ground. Fig. 116: Identifying Jack Stand Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 89 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 117: Identifying Retaining Bracket And Screw Courtesy of VOLKSWAGEN UNITED STATES, INC. Insert supporting plate with open retaining bracket - 1 - in wheel bearing housing. Close the retaining bracket - 1 - and secure with screw - 2 -.
Page 90 2008 Audi A6 Quattro Maintenance Maintenance Procedures Installing suspension blocks on rear axle Workshop arrangement Upper distance ring: T40082/5 Lower distance ring: T40082/6 Fig. 119: Identifying Vehicle Rear Axle On Drive-On Ramp T40081 Courtesy of VOLKSWAGEN UNITED STATES, INC. Drive vehicle rear axle onto Drive-on ramp T40081.
Page 91 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 121: Identifying Jack Stand Courtesy of VOLKSWAGEN UNITED STATES, INC. Stand WARNING: Protect vehicle on stand from falling down. Remove drive-on ramp. Fig. 122: Pushing Rubber Buffer Down And Inserting Upper And Lower Distance Ring Courtesy of VOLKSWAGEN UNITED STATES, INC.
Page 92: Vehicle, Lifting
2008 Audi A6 Quattro Maintenance Maintenance Procedures VEHICLE, LIFTING VEHICLE, LIFTING Vehicle lifting mode on vehicle with air suspension NOTE: Before lifting vehicle with vehicle jack or lift, vehicle lifting mode must be activated so that the automatic air suspension regulating process does not make lifting with vehicle jack or lift more difficult.
Page 93: Tow Starting/Towing
2008 Audi A6 Quattro Maintenance Maintenance Procedures Floor jack NOTE: On vehicles with air suspension, vehicle lifting mode must be reset before lifting with floor jack to prevent unexpected air suspension regulation measures. Always use a suitable rubber or wooden block between the jack and the vehicle.
Page 94 2008 Audi A6 Quattro Maintenance Maintenance Procedures example, suspension blocks must be installed. The vehicle cannot be towed when suspensions blocks are installed. Front towing eye Attach tow rope or bar only at following eye: Remove cover from below. Remove towing eye from vehicle tool kit.
Page 95 2008 Audi A6 Quattro Maintenance Maintenance Procedures Fig. 125: Identifying Rear Towing Eye Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove cover from above. Avant Fig. 126: Identifying Plug Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove plug. NOTE: The tow-rope should be able to stretch to reduce the risk of damage to both vehicles.
Page 96 2008 Audi A6 Quattro Maintenance Maintenance Procedures Regulations concerning towing must be observed. Both drivers must be familiar with the specifics of towing procedures. Inexperienced drivers should not attempt to tow start or tow. When using a tow rope the driver of the towing vehicle must engage the clutch very gently when moving off and changing gear.
Page 97 Performance check Perform performance check on performance test stand recommended by Audi. The corresponding correction factors for automatic transmissions and all wheel drive are provided in these test stands. Vehicles with all wheel drive may only be tested on a four-wheel performance test stand. The four-wheel performance test stand V.A.G...
Page 98 2008 Audi A6 Quattro Maintenance Maintenance Procedures 1858 has movable rollers in order to be able to test vehicles with different axle spacing. Tachometer check With the tachometer test, the vehicle wheels are driven. Vehicles with all wheel drive may only be tested on a four-wheel test stand.

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