2008 AUDI S8 service

What do I do now? -
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• Drive at reduced speed until you have the tightening torqu es
checked .•
A pplies to vehic les: wi th deco ra tive w heel covers
Decorative wheel covers
The decorative wheel covers must be removed first to
access the wheel bolts.
Removing
Fig . 284 Changing a
wheel: Removing the
wheel cover
-Insert the hook prov ided with the vehicle tool k it in the
hole in the hub.
Pull off the
decorative wheel cover ~ fig. 284. •
A pp lies to veh ic les: w ith whee l bo lts with caps
Wheels with wheel bolt caps
The caps must be removed first from the wheel bolts
before the bolts can be unscrewed .
Removing
Fig. 285 Changing a
wheel: removing the
wheel bolt caps
-Push the plastic clip provided with the veh icle tool kit
over the wheel bolt cap unt il it engages.
-Pull on the plastic clip to remove the cap~ fig. 285.
Refitting
-Place the caps over the wheel bolts and push them back
on.
Th e caps are to pro tect and ke ep the wheel bo lts clean. •
Vehicle care Do-it-yourself service irechnical data

What do I do now? -
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Fig. 288 Clos e-up :
prope r positioning of
jack
- Activa te the ve hicle ja cking mode before c ha ngin g a
w heel
=> p age 188.
- Posi tio n th e jack bel ow th e doo r sill und er t he mounting
point
th at is c los est to th e w hee l to be cha nged
=> p age 354 , fig. 28 7.
- Exten d the
jack und er the li ftin g po int on the do or sill
un til it s a rm is posi tio ned direct ly und er t he lif tin g p oint
=>& .
- Alig n the j ack so tha t its a rm @ en gag es t he plast ic
lif tin g p oint on the door sill a nd the mova ble base ® is
fl at on the
groun d=> fig . 288.
- Wind t he jack up furt her u ntil the flat t ire co mes off the
gr oun d=> &-
The jack must be installed only at the places indicated ~ page 354,
fig. 287 . There is exa ctly on e loca tion for e ach w heel. The ja ck m ust
not be positioned at any other
l ocation~ &.
The jack sho uld be posit ioned ap pro xima tely 8 in . (2 0 cm) be hind
th e fro nt whe el or 6 i n. (1 5 c m) in fr ont o f the rear w heel.
A n unstab le surfac e under th e jack can cause the vehicl e to s lip off
t h e jack . A lways pro vide a firm base for th e ja ck on the grou nd. If
necessary place a s turdy board or similar support under the ja ck. On ha
rd, s lippery surfaces (such as ti les) us e a rubb er mat or similar to
p revent th e ja ck fro m
slippin g~ & .
& WARNING
• You or your pa ssengers could be injured while changing a
wheel if you do not follow these safety precautions:
-Positioning the jack under the vehicle at any other place than
those indicated above may damage the vehicle or may result in
personal injuries.
- A soft or unstable surfa ce under the ja ck may cause the
vehicle to slip off the jack . Always provide a firm base for the
jack on the ground . If necessary , use a sturdy board under the
jack .
- On hard , slippery surface (such as tiles ) use a rubber mat or
similar to prevent the jack from slipping.
• To help prevent injury to yourself and your passengers :
- Do not raise the vehicle until you are sure the jack is securely
engaged .
- Passengers must not remain in the vehicle when it is jacked
up .
- Make sure that passengers wait in a safe place away from
the vehicle and well away from the road and traffic .
- Make sure jack position is correct , adjust as necessary and
then continue to raise the jack.
[ i ] Tips
Befo re c hangi ng th e wheel, yo u must ac tivate the jac king mode, s o
that the automatic controls for the Adapt ive Air Suspension do not
make it more difficult to lift the veh ic le with the
jack ~ page 188. •
Vehicle care Do-it-yourself service irechnical data

What do I do now? -
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•
hub. Remove all dirt from these surfaces before remounting the
wheel. •
Tires with unidirectional tread design
Tires with unidirectional tread design must be mounted
with their tread pattern pointed in the right direction.
Using a spare tire with a tread pattern intended for use
in a specific direction
When using a spare tire with a tread pattern intended for use in a specific direction , please note the following:
• The direction of rotation is marked by an arrow on the side of the
tire .
• If the spare tire has to be installed in the incorrect direction, use
the spare tire only temporarily since the tire will not be able to
achieve its optimum performance characteristics with regard to
aquaplaning, noise and wear.
• We recommend that you pay particular attention to this fact
during wet weather and that you adjust your speed to match road
conditions.
• Replace the flat tire with a new one and have it installed on your
vehicle as soon as possible to restore the handling advantages of a
unidirectional tire. •
Notes on wheel changing
Please read the information =:> page 336, "New tires and replacing
tires and wheels" if you are going to use a spare tire which is
different from the tires on your vehicle.
After you change a tire :
• Check the tire pressure on the spare immediately after installa­
tion. •
Have the wheel bolt tightening torque checked with a torque
wrench as soon as possible by your authorized Audi dealer or a
qualified service station .
• With steel and alloy wheel rims, the wheel bolts are correctly
tightened at a torque of 90 ft lb (120 Nm}.
• If you notice that the wheel bolts are corroded and difficult to
turn while changing a tire, they should be replaced before you check
the tightening torque.
• Replace the flat tire with a new one and have it installed on your
vehicle as soon as possible. Remount the wheel cover.
Until then, drive with extra care and at reduced speeds .
& WARNING
• If you are going to equip your vehicle with tires or rims which
differ from those which were factory installed, then be sure to read
the information
=:> page 336, "New tires and replacing tires and
wheels".
• Always make sure the damaged wheel or even a flat tire and
the jack and tool kit are properly secured in the luggage compart­
ment and are not loose in the passenger compartment.
• In an accident or sudden maneuver they could fly forward,
injuring anyone in the vehicle .
• Always store damaged wheel, jack and tools securely in the
luggage compartment . Otherwise, in an accident or sudden
maneuver they could fly forward, causing injury to passengers in
the vehicle .
• Do not use commercially available tire sealants. Otherwise, the
electrical components of the tire pressure monitoring system will
no longer work properly and the sensor for the tire pressure moni ­
toring system will have to be replaced by a qualified workshop. •
Do -it -yourself service

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[ i J Tips
You are well advised to keep a supply of spare fuses in your vehicle.
Fuses with the proper ampere ratings are available at your Audi
dealer. •
Fuse Location , Instrument Panel left
Fig . 293 Fuse panel
layout
Some of the equipment items listed are optional or only available on
certain model configurations.
Note that the following table is accurate at the time of going to
press and is subject to change. In the event of discrepancies, the
label on the inside of the cover always takes precedence.
The power windows and the power seats are protected by circuit
breakers, which automatically reset after a few seconds after the
overload -for example if a window is frozen -has been remedied.
No. Equipment
1 Garage door opener (Homelinkl 5
2
Parking assist system 5
3
Parking assist system 5
4
Headlight range control/light control device 10
No.
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Equipment Amps
Instrument cluster 5
Steering column electronics system control 10
Diagnostic connector 5
Diagnostic connector/oil level sensor 5
ESP control unit/steering angle sensor 5
Instrument cluster 5
Audi lane assist 10
Brake light switch 5
Telephone/cell phone 10
Vacant
Access/start control module
5
RSE system 10
Adaptive Cruise Control 5
Heated washer jets 5
Vacant
Tire pressure mon itoring system
5
Vacant
Brake light switch
5
Cell phone preparation 5
Horn 15
Windshield wiper system 40
Vacant Electronic Stabilization Program (ESP)
25
Vacant
Switch illumination
1
Vehicle care Do-it-yourself service irechnical data

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No . II Equipm ent
8 Engine control, auxiliary water pump
9
10 C
limate control front /rear, dash panel buttons
Suspension level control system
(Adaptive Air Suspension)
11 Light and rain sensor
1 2 Display -/control unit
13 Roof electronics control unit
CD/DVD d rive
15 Energy managemen t
16 Vacant
17 Radiator fan e lectronics
18 Airbag front passenger recognition
(weight sensor)
19 Vacant
20 Heated/ventilated seats
21 Engine control module
22 Vacant
23 Parking brake (switch)
24 Vehicle electrical syste m
25
26
27
Automatic transmission Air condi tioning water valves wate r pump,
rea r climate control
Sunroof
28 Engine control module
29 Fuel injectors
30 Ignition coils
Amps
10
5
1 0
5
5
10
5
5
5
5
5
5
5
1 0
15
10
20
5
1 5
30
-
No . Equipm ent
31 Fuel pump , right/fue l pump e lectronics
32 Automatic transmission
33
34
Right rear footwe ll heater
Heated/ventila ted seats, rear
35 Heated/ventilated seats, front
36 Cigarette lighter, front
37 Cigarette lighter, rear/socket, rear
38 Auxil iary cooler fan
39 Door contro l unit, front right
40 Brake booster
41 Door contro l unit, rear right
42 Vacant
43 Headlight washer system
44 A ir co nditioning heater fan
Amps
20/40
5
25
20
20
20
20/25 20
7.5
1 5
7.5
30
30 •
Fuse Location , Luggage Compartment left
0
Fig . 2 95 Fuse pan el
l a you t _.
Vehicle care Do-it-yourself service irechnical data

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•
erly put back together to help prevent breakage of parts and long
t erm damage from water t hat can enter housings that have not
been properly resealed .
For your safety, we recommend that you have your authorized Audi
dea ler replace any bu lbs for you, s ince your dealer has the proper
tools, the correct bu lbs and the expertise .
Ga s di scharge lamp s (Xenon light s):
Due to the high e lectrical voltage, have the bu lbs replaced by a qual ­
ified technician. Headlights with Xenon light can be identified by the
h ig h voltage st icker .
& WARNING
Contact with high -voltage component s of the ele ctric al sys tem
and improper repla cement of ga s di sch arge (Xenon ) headlight
bulb s can cau se ser iou s per son al injury and death .
• Xen on bulbs are pres suri zed and can explode when be ing
c h anged .
• Changing Xenon lamp s require s the special training , in struc ­
tion s and equipment .
• Only an authorized Audi dealer or othe r qualified work shop
s hould ch ange the bulbs in g as dis charge l amp s.
& WARNING
There are parts with sharp edges on the open ings and on the bulb
holder s th at can c ause seriou s cuts.
• If you are uncert ain about what to do , have the work perform ed
b y a n author ized Audi de aler or other qu alified work shop. Seri ous
personal injur y ma y re sult from improperl y perfo rmed work.
[ i] Tips
• I f you must replace the light bulbs yourself, a lways remember
that t he engine compartment of any vehicle is a hazardous area to work in
. Always read and heed all
WARNINGS=> page 299, "Engine
compartment" =>& .
• I t is best to ask your authorized Audi dealer whenever you need
t o change a bulb. •
Do-it -yourself service

________________________________________________ E=..:.; m:..:.:: e:.:.r.::g ~e::.:..: n:.:c ~y~ s:: i:.:t .=u :.:a:. t:: i:.:o :.:n..:.:: s~_JIIII
fl::. WARNING (continued)
• Before you check anything in the engine compartment, always
read and heed all
WARNINGS~ page 299, "Engine compartment".
0 Note
• Applying a higher voltage booster battery will cause expensive
damage to sensitive electronic components, such as control units,
relays, radio, etc .
• There must be no electrical contact between the vehicles as
otherwise current could already start to flow as soon as the positive
( + ) terminals are connected.
[ i) Tips
• The discharged battery must be properly connected to the
vehicle's electrical system. When jump starting or charging the battery , never connect the negative ground cable to the battery
negative post because the battery manager system must be able to
detect the battery's state of charge. Always connect the negative
ground cable to the negative ground post of the battery manager
control unit .•
Use of jumper cables
Make sure to connect the jumper cable clamps in exactly
the order described below!
Fig. 297 Jump starting
with the battery of
another vehicle: A -
discharged vehicle
battery, B -booster
battery
The procedure described below for connecting jumper
cables is intended to provide a jump start for your vehicle.
Vehicle with discharged battery:
-Turn off lights and accessories, move lever of automatic
transmission to
N (Neutral) or P (Park) and set parking
brake.
Connect POSITIVE (+) to POSITIVE (+) (red)
1. Connect one end to the positive terminal => fig. 297 G)
of your battery @.
2. Connect the other end to the positive terminal
@ of the
booster battery
@.
Connect NEGATIVE (-) to NEGATIVE (-) (black)
3. Connect one end to the negative terminal @ of the
booster battery
@.
Vehicle care Do-it-yourself service irechnical data

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4. Connect the other end to the negative ground post of the
battery manager control unit located next to the battery.
Starting the engine
-Start the engine of the vehicle with the booster battery.
Run the engine at a moderate speed.
- Start engine with discharged vehicle battery in the usual
manner .
- If the engine fails to start: do not keep the starter
cranking for longer than 10 seconds. Wait for about 30
seconds and then try again.
- With engine running, remove jumper cables from both vehicles in the exact
reverse order.
The battery is vented to the outside to prevent gases from entering
the vehicle interior . Make sure that the jumper clamps are well
connected with their metal ports in full contact with the battery
terminals.
& WARNING
To avoid serious personal injury and damage to the vehicle, heed all warnings and instructions of the jumper cable manufacturer. If
in doubt, call for road service.
• Jumper cables must be long enough so that the vehicles do not
touch.
• When connecting jumper cables, make sure that they cannot
get caught in any moving parts in the engine compartment.
• Before you check anything in the engine compartment, always
read and heed all
WARNINGS ~ page 299, "Engine compartment".
0 Note
Improper hook -up of jumper cables can ruin the generator. •
Always connect POSITIVE(+) to POSITIVE(+), and NEGATIVE(-) to
NEGATIVE( -) ground post of the battery manager control unit.
• Check that all screw plugs on the battery cells are screwed in
firmly. If not, tighten plugs prior to connecting clamp on negative
battery terminal.
• Please note that the procedure for connecting a jumper cable as
described above applies specifically to the case of your vehicle
being jump started. When you are giving a jump start to another
vehicle, do not connect the negative(-) cable to the negative(-)
terminal on the discharged
battery @~ page 365, fig. 297. Instead,
securely connect the negative(-) cable to either a solid metal
component that is firmly bolted to the engine block or to the engine
block itself. If the battery that is being charged does not vent to the
outside, escaping battery gas could ignite and explode! •
Emergency towing with commercial
tow truck
General hints
Your Audi requires special handling for towing.
The following information is to be used by commercial tow truck
operators who know how to operate their equipment safely.
• Never tow your Audi, towing will cause damage to the engine
and transmission.
• Never wrap the safety chains or winch cables around the brake
lines.
• To prevent unnecessary damage, your Audi must be transported
with a flat bed truck.
• To load the vehicle on to the flat bed, use the towing loop found
in the vehicle tools and attach to the front or rear anchorage
~ page 367 and ~ page 368 . .,,_