Audi A6 Quattro 2008 Manual

Maintenance
Maintenance Procedures
01 - MAINTENANCE
ENGINE OVERVIEW
Gasoline engines
NOTE: 
Some engines listed below are for European models.
Engine code BPJ BDW AUK BBJ BDX BAT BVJ BXA
Emissions
category EU IV EU IV EU IV EU IV EU IV EU IV EU IV EU IV
No. of cylinders 4 6 6 6 6 8 8 10
Displacement L 2.0 2.4 3.2 3.0 2.8 4.2 4.2 5.2
Output
kW at
RPM
125/
4300-
6000
130/
5800 188/ 6000- 7200 160/ 6200
154/
5500-
6800
246/
6500 257/ 6800 320/ 6800
Torque
Nm at
RPM
280/
1800-
4200 230/3000 330/3400 300/3200 280/
3000-
5000 410/3500 440/3500 540/3500
Bore mm 82.5 81.0 84.5 82.5 84.5 84.5 84.5 84.5
Stroke mm 92.8 77.4 92.8 93.0 82.4 92.8 92.8 92.8
Compression ratio 10.3 10.3 12.5 10.5 12.0 11.0 12.5 12.5
Engine code BPJ BDW AUK BBJ BDX BAT BVJ BXA
Fuel injection/Ignition TFSI MPI FSI MPI FSI MPI FSI FSI
RON min. 95 * See
footnote 95 * See footnote 95 * See footnote 98 * See footnote 95 * See footnote 98 * See footnote 98 * See footnote 98 * See footnote
Hydraulic valve lifter
function X X X X X X X X
On Board Diagnostic X X X X X X X X
Catalytic converter X X X X X X X X
Electronic throttle (E-
Gas) X X X X X X X X
Oxygen sensor control X X X X X X X X
Secondary air injection X X - X X X X X
Exhaust gas
recirculation --------
2008 Audi A6 Quattro
Maintenance Maintenance Procedures
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Maintenance Maintenance Procedures
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* 91 RON standard unleaded gasoline is permissible, however with decreased power output.
* 95 RON Super unleaded gasoline is permissible, however with decreased power output.
Diesel engines
*Belgium only
DELIVERY INSPECTION
DELIVERY INSPECTION
For information regarding Inspection Service refer to --> ServiceNet; Delivery Satisfaction; Perfect Delivery
Inspection (PDI) forms for appropriate model and year.
OIL CHANGE SERVICE
Turbocharger X - - - - - - -
Emissions test after
3.5,7,9, etc. years X X X X X X X X
Engine code BNA *
See
footnote
BLB BVG BRE BRF BPP BSG BMK BNG *
See
footnote
Emissions
category EU IV EU IV EU IV EU IV EU IV EU IV EU IV EU IV EU IV
No. of cylinders 4 4 4 4 4 6 6 6 6
Displacement L 2.0 2.0 2.0 2.0 2.0 2.7 2.7 3,0 3,0
Output
kW
at
RPM 100/4000 103/4000 89/4000 103/4000 100/4000 132/4000120/4000 165/4000 155/4000
Torque
Nm
at
RPM
320/
1850-
2500
320/
1850-
2500
320/
1850-
2500
320/
1850-
2500
320/
1850-
2500
380/
1500-
3200
380/
1500-
3200
450/
1400-
3250
450/
1400-
3250
Bore mm 81.0 81.0 81.0 81.0 81.0 83,0 83,0 83,0 83,0
Stroke mm 95.5 95.5 95.5 95.5 95.5 83.1 83.1 91.4 91.4
Compression ratio 18:1 18:1 18.5:1 18.5:1 18.5:1 17.5:1 17.5:1 17:1 17:1
Fuel injection Pumpe-
Duse Pumpe- Duse Pumpe- Duse Pumpe- Duse Pumpe- Duse
Common
- Rail
Common
- Rail
Common
- Rail
Common
- Rail
DPF - - X X X optional - optional optional
CN,min. 51 51 51 51 51 51 51 51 51
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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
year
INSPECTION SERVICE
INSPECTION SERVICE
For appropriate service intervals refer to --> ServiceNet; Maintenance Schedule for appropriate model year
DESCRIPTION OF WORK
ALL SWITCHES, ALL ELECTRICAL COMPONENTS, ALL DISPLAYS AND OTHER OPERATING
ELEMENTS: CHECKING FUNCTION
Check following:
Lighting, headlamps, fog lights, turn signals, hazard warning flashers, taillights, rear fog lights, backup
lights, brake lights, parking lights
Interior and reading lights (automatic shutoff on interior lights), illuminated storage compartment,
illuminated ashtray, luggage compartment lighting, illuminated ignition
Warning buzzer for lights and/or radio left on
All switches in console
MMI function (radio, navigation, etc.)
Driver Information System (DIS)
Instrument unit with all displays, meters and lights
Two-tone horn
Windshield/headlamp wipers, headlamp cleaning system
Cigarette lighter
Electrical exterior mirrors (heated, adjustable, foldable)
Electric windows
Electric tilt/slide sunroof
Sun shade
Central locking, remote control operation, comfort closing

Electrical seat, headrest, steering wheel and seatbelt height adjustment
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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
WHEEL DRIVE
39 FINAL DRIVE - FRONT DIFFERENTIAL for AUTOMATIC TRANSMISSION 09L, ALL
WHEEL DRIVE
39 FINAL DRIVE, DIFFERENTIAL for CONTINUOUSLY VARIABLE TRANSMISSION (CVT)
01J
39 - FINAL DRIVE, DIFFERENTIAL for CONTINUOUSLY VARIABLE TRANSMISSION (CVT)
01J - INTERNAL COMPONENTS, SERVICING
Continuously Variable Transmission (CVT)
--> -
39 - FINAL DRIVE, DIFFERENTIAL for 6 SPD. AUTOMATIC TRANSMISSION 09E ALL
WHEEL DRIVE
39 FINAL DRIVE - FRONT DIFFERENTIAL for AUTOMATIC TRANSMISSION 09L, ALL
WHEEL DRIVE
39 FINAL DRIVE, DIFFERENTIAL for CONTINUOUSLY VARIABLE TRANSMISSION (CVT)
01J
39 - FINAL DRIVE, DIFFERENTIAL for CONTINUOUSLY VARIABLE TRANSMISSION (CVT)
01J - INTERNAL COMPONENTS, SERVICING
BATTERY MANAGER: DEACTIVATE TRANSPORT MODE
Transport mode is for maintaining a vehicles startability (battery charge). Transport mode limits discharging of
battery. If transport mode is activated, many functions are not available or have limited function, for example,
CD changer is deactivated, radio is deactivated, etc.
Deactivate transport mode using guided fault finding or guided functions.

Follow these steps in sequential order.
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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
Now follow guided program
BATTERY LEVEL, READ OUT WITH GUIDED FAULT FINDING

Follow these steps in sequential order.
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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.
BATTERY: CHECK ELECTROLYTE LEVEL
Battery with magic eye
Switch ignition off and remove ignition key.
Sedan:

Raise luggage compartment floor covering and secure.
NOTE: If tester display shows charge or replace battery, see --> - 27 - STARTER,
GENERATOR, CRUISE CONTROL
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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-.
Fig. 4: Identifying Battery Retaining Band
Courtesy of VOLKSWAGEN UNITED STATES, INC.
All:

If present, open battery retaining band
-
1
-
.
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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-.
Fig. 6: Locating Magic Eye
Courtesy of VOLKSWAGEN UNITED STATES, INC.
The magic eye - arrow - gives information about electrolyte level and battery charge.
Three color displays are possible:
NOTE: 
Shown with formed insert removed in illustration.
Color display Battery level
Green Battery is sufficiently charged
Black No charge or charge too low
Colorless or
yellow Electrolyte has reached critical level, battery must be replaced! --> - 27 -
STARTER, GENERATOR, CRUISE CONTROL
NOTE: If the battery was recharged, that is, if it was charged while driving, air
bubbles can form under the magic eye. These cause an incorrect magic
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Battery sealing plugs
On batteries with visible min and max markings, electrolyte level only needs to be checked visually.
Electrolyte level must be between min. and max. markings.
On batteries where the outer min. and max. markings are difficult to see or the visibility of the electrolyte
level cannot be guaranteed due to the opaque battery housing, the sealing plugs must be removed. Then it
is possible to check electrolyte level by a visual inspection of the battery interior.
The electrolyte level must meet the inner electrolyte level marking (plastic bar). This corresponds to the
outer max. mark.
TIRES: CHECKING CONDITION, WEAR PATTERN AND TREAD DEPTH AND ADJUSTING TIRE
PRESSURE.
Tires, checking
Delivery inspection
Check running surfaces and side walls for damage, remove foreign materials, if necessary.
Inspection service
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.
This removes air bubbles.
Read "magic eye" color display.
NOTE: If electrolyte level is too low, battery loses capacity (loses performance)
because the cell plates dry out. If the cell plates are not covered by
electrolyte, the plates and plate bridges start to corrode causing the
function of the battery to diminish. After a while the battery does no longer
function. The battery becomes useless.
WARNING: If the electrolyte level is below them in. marking, the battery must be
replaced! --> - 27 - STARTER, GENERATOR, CRUISE CONTROL
NOTE: For reasons of safety only tires of same type and tread pattern should be
fitted on a vehicle!
On All Wheel Drive vehicle tires of the same type and tread pattern must
be used. Otherwise the center differential may be damaged.
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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.
Check tread depth.
Minimum depth: 1.6 mm
Fig. 7: Checking Tire Tread Depth
Courtesy of VOLKSWAGEN UNITED STATES, INC.
The minimum tread depth is reached when the tires have worn down level with the 1.6 mm high tread
wear indicators - arrows - positioned at intervals around the tire.
If the tread depth is approaching the legal minimum permissible depth, the customer must be informed.
Tire pressure, adjusting
WARNING: Report any damage to customer and mark repair order accordingly.
NOTE: This value may vary for individual countries due to different legislative
regulations.
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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.
Spare wheel
Spare wheel with standard tire
Keep the highest pressure intended for the vehicle
Mini spare tire
Pressure is on side of tire
Tire repair kit: Checking
Fig. 9: Identifying Durability Date In Tire Repair Kit
Courtesy of VOLKSWAGEN UNITED STATES, INC.
On vehicles with a tire repair kit, check durability date - arrow -.
NOTE: Observe that the inflation pressure specifications on the sticker refer to
the air pressure of cold tires. Do not reduce increased pressures on warm
tires.

When using winter tires, the tire pressure must be increased about 0.2 bar.
NOTE: On vehicles with steel rims and wheel covers, check tire pressure valve
extensions for damage and contamination that can cause leaks. Replace, if
necessary.
NOTE: 
If expiration date has passed, replace bottle.
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BRAKE FLUID, CHANGING
Special tools, testers, and measuring equipment
Fig. 10: VAS 5234 Brake Filler And Bleeder Unit
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Brake filling and bleeding tool VAS 5234
Fig. 11: Identifying Brake Filler And Bleeder Unit V.A.G 1869
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Brake filling and bleeding tool V.A.G 1869 with upgrade kit V.A.G 1869/4
NOTE: 
Use only new Original VW / Audi brake fluid, see ETKA
WARNING: Brake fluid must never come into contact with fluids containing
mineral oils (oil, gas, cleaning solutions). Oils containing minerals
damage seals and sleeves on brake systems.
Brake fluid is poisonous. Due to its caustic nature, it must also
never be brought into contact with paint.
Brake fluid is hygroscopic, which means that it absorbs moisture
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Observe operating instructions for VAS 5234 or for V.A.G 1869 !
Fig. 12: Identifying Brake Fluid Reservoir Cap
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Remove brake fluid reservoir cap - 1-.

Remove brake fluid reservoir plug
-
arrow
-
.
from the air. Always store brake fluid in air-tight containers.
Wash off brake fluid spillage using plenty of water.
Observe waste disposal regulations!
WARNING: 
The strainer in the brake fluid reservoir must not be removed.
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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.
With suction hose from VAS 5234 or from V.A.G 1869 or with extractor, extract 2/3 of the brake fluid.
Disconnect suction hose.
Connect suction hose from VAS 5234 or V.A.G 1869 to tube - 2- of brake fluid reservoir.
With suction hose from VAS 5234 or from V.A.G 1869 or with extractor, extract 2/3 of the brake fluid.
Disconnect suction hose.
Install brake fluid reservoir plug.
WARNING: Do not reuse, (used) extracted brake fluid.
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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.
Vehicles with manual transmission:
Pull cover cap off clutch slave cylinder bleed screw.
Fig. 15: Connecting Bottle Bleeder Hose
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Place extractor bleeder hose - 1- on clutch slave cylinder bleeder screw, open bleeder screw, and let
about 100 ml drain out. Close bleeder screw and install cover cap.
Operate clutch pedal several times.
Continued for all vehicles:

Remove caps from the bleeder screws.
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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.
Repeat work sequence on other side of vehicle at rear.
Fig. 17: Identifying Fluid Level
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Connect extractor bleeder hose - 1- to front right bleeder screw, open bleeder screw and allow about 200
ml to flow out. Close bleeder screw.
Repeat work sequence on other side of vehicle at front.
Table - Sequence / quantity of brake fluid
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* Including brake fluid extracted from brake fluid reservoir and quantity from clutch slave cylinder.
Fit cover caps to brake caliper bleed screws.
Move filler lever on VAS 5234 or V.A.G 1869 to position - B- (see operating instructions).
Take filler hose off adapter.
Unscrew adapter from brake fluid reservoir.
Fig. 18: Identifying Fluid Level
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Check brake fluid level and correct if necessary.
Install cap to brake fluid reservoir.
Check pedal pressure and brake pedal free play. Free play: Max. 1 / 3of pedal travel
BRAKE SYSTEM: VISUAL INSPECTION FOR LEAKS AND DAMAGE
Check the following components for leaks and damage:
Brake master cylinder
Brake booster
ABS Hydraulic unit
Brake calipers
Check that brake hoses are not twisted.

Ensure brake hoses do not come in contact with any vehicle components when steering is at full lock.
Right rear 200 ml
Left rear 200 ml
Right front 200 ml
Left front 200 ml
Total amount * See footnote 1.000 ml
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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.
BRAKE PADS: THICKNESS, CHECKING
Front disc brake pads:
Fig. 19: Identifying Thickness Of The Inner Pad
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Before removing, mark the placement of the wheels to each brake disc and reinstall wheels in same
position after checking.
Rear disc brake pads:
WARNING: Malfunctions found must be rectified (repair measure).
WARNING: At a pad thickness of 11 mm (including backing plate) the brake pads
have reached their wear limit and must be replaced (repair measure).
Inform the customer.
NOTE: 
To check lining thickness, you must remove front wheels.
WARNING: At a pad thickness of 8 mm (including backing plate) the brake pads have
reached their wear limit and must be replaced (repair measure). Inform the
customer.
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Fig. 20: Identifying Thickness Of The Inner Pad
Courtesy of VOLKSWAGEN UNITED STATES, INC.
BRAKE FLUID LEVEL, DEPENDENT ON LINING WEAR: CHECK
Please observe the following:
Delivery inspection
Fig. 21: Identifying Fluid Level
Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE: 
Visual inspection without removing wheels
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.
Brake fluid is hygroscopic, meaning that it absorbs moisture from
the surrounding air, and must therefore always be stored in air-tight
containers.
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Fluid level must be at MAX mark
Inspection service
When driving, fluid level drops slightly from use and automatic brake pad adjustment.
Always check fluid level in conjunction with brake pad wear:
When brake pads are new or if there is still enough brake lining left, the brake fluid level must be
between MIN and MAX marks.
With brake fluid at MIN mark or slightly above, topping off brake fluid is not necessary when wear limit
of brake pads has been almost reached.
DIGITAL TV TUNER: ASSIGN REMOTE CONTROL KEY FOB
ELSA: Vehicle electrical - Installation guide, Digital TV Tuner
CHECK VEHICLE KEY FUNCTION
Separate keys so that the function of each key can be checked individually.
Mechanically lock and unlock vehicle with keys on drivers door.
Insert keys in ignition and start engine one after the other.

If engine switches off by itself after about 3 seconds and "SAFE" appears in the odometer display, the key
has not been programmed to the immobilizer.
Repair measures: Guided Fault Finding (Programming vehicle keys).
Note number of checked and delivered vehicle keys in delivery protocol.
DTC MEMORY, INTERROGATING WITH VEHICLE DIAGNOSIS, TESTING AND
INFORMATION SYSTEM VAS 5051/5052

Follow these steps in sequential order.
NOTE: To prevent the brake fluid from overflowing from the reservoir, the level
must not be over the MAX mark.
WARNING: If brake fluid level is below MIN mark, check brake system (repair
procedure), before adding brake fluid.
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