oil AUDI S8 2008 Owner's Guide

Tires and wheels -
----------------
•
& WARNING (continued)
crashes and serious personal injuries . Have worn or damaged tires
replaced immediately.
• Tires age even if they are not being used and can fail suddenly,
especially at high speeds. Tires that are more than 6 years old can
only be used in an emergency and then with special care and at
low speed.
Glossary of tire and loading terminology
Accessory weight
means the combined weight (in excess of those standard items
which may be replaced) of automatic transmission, power steering,
power brakes, power windows, power seats, radio, and heater, to
the extent that these items are available as factory-installed equip­
ment (whether installed or not).
Aspect ratio means the ratio of the height to the width of the tire in percent.
Numb ers of 55 or lower indicate a low sidewall for improved
steering response and better overall handling on dry pavement.
Bead
means the part of the tire that is made of steel wires, wrapped or
reinforced by ply cords and that is shaped to fit the rim.
Bead separation
means a breakdown of the bond between components in the bead.
Cord
means the strands forming the plies in the tire.
& WARNING (continued)
• Never mount used tires on your vehicle if you are not sure of
their
"previous history." Old used tires may have been damaged
even though the damage cannot be seen that can lead to sudden
tire failure and loss of vehicle control.
• If you notice unusual vibration or if the vehicle pulls to one side
when driving, always stop as soon as it is safe to do so and check
the wheels and tires for damage.
•
Cold tire inflation pressure
means the tire pressure recommended by the vehicle manufacturer
for a tire of a designated size that has not been driven for more than
a couple of miles (kilometers) at low speeds in the three hour period
before the tire pressure is measured or adjusted.
Curb weight
means the weight of a motor vehicle with standard equipment
including the maximum capacity of fuel, oil, and coolant, air condi­
tioning and additional weight of optional equipment.
Extra load tire
means a tire design to operate at higher loads and at higher infla ­
tion pressures than the corresponding standard tire. Extra load tires
may be identified as
"XL", "xi", "EXTRA LOAD", or "RF" on the side ­
wall.
Gross Axle Weight Rating
("GAWR")
means the load-carrying capacity of a single axle system, measured
at the tire -ground interfaces.
Gross Vehicle Weight Rating
( " GVWR")
means the maximum total loaded weight of the vehicle.
Vehicle care

Tires a nd wh eels -
----------------
•
0 Not e
Driving without valve stem caps can cause damage to the tire
valves. To prevent this, a lways make sure that factory instal led valve
stem caps on a ll whee ls are securely mounted on the va lve .
W Fo r the sake of the env ironm ent
Underinflated tires wil l a lso increase the fuel consumption. •
Tires and vehicle load limits
There are lim its to t he amount of load or weight that any ve hicle and
any tire can carry . A vehicle that is overload ed wil l not hand le well
and is more difficu lt to stop. Overload ing can not only lead to loss
of vehic le control , but can a lso damage important parts of the
vehic le and ca n lead to sudden t ire fa ilure, inc luding a blowout a nd
sudden deflation that can cause the vehic le to crash.
Your safety and that of your passengers also depends on making
sure that load l imits are not exceeded. Vehicle load includes every­
body and everything in and on the vehic le. These load limits are
technica lly referred to as the vehicle's
Gross Ve hicle We ig ht R ating
("GVWR").
The "GVWR" includes t he weight of the bas ic ve hicle, al l factory
insta lled accessories, a full tank of fuel , oil , coolant and other fluids
p lus maximum load . The maximum load i ncludes the number of
passengers that the vehicle is intended to carry ("seating capacity")
with an assumed weight of 150 lbs (68 kg) for each passenger at a
designated seating position and the total weight of any luggage in
the vehicle . If you tow a trailer, the weight of the trailer h itch and the
tongue we ight of the loaded trai ler must be included as part of the
vehic le load.
The
Gros s Axle We ight Rating ("GAWR") is the maximum load t hat
can be applied at each of the vehicle's two axles. The Gross Vehicle Weight Rating and the Gross Axle Weight Rating
are listed on the safety comp liance s ticker label loca ted either on
the driver's side B-pillar or on the inside of the fuel fil ler flap . Your
Audi has 5 seating positions, 2 in the front and 3 in the rear for total
seating capacity of 5. Vehicles with power individual rear seats*
have 4 seating positions, 2 in the front and 2 in the rear for total
seating capacity of 4. Eac h seating position has a safety be lt
~ page 209, "Safety be lts".
The fact that there is an upper limit to your veh icle's Gross Vehicle
Weight Rating means that the total weight of whatever is being
carried in the veh ic le ( including t he we ight of a trai ler hitch and the
tongue weight of the loaded trai ler) is limited . The more passengers
in the vehicle or passengers who are heavier than the standa rd
we ights assumed mean that less weight can be carried as luggage .
The tire pressure labe l on your Audi also lists the maximum
combined we ight of a ll of the occupants and luggage or other cargo
that th e vehicle can carry. For the location of the lab el
~ page 328 ,
fig. 272 .
& WARNING
Overloading a v ehicl e can cau se loss of vehicl e control , a cras h or
o ther ac cident , serious p ers on al injur y, and eve n de ath.
• C arrying more weight th an your vehi cle was designed to c arry
will prevent the vehicl e from handling prop erl y and in cre a se the
ri sk of the l oss of vehi cle control.
• The br akes on a vehi cle that has b een overload ed may not be
a bl e to sto p the vehi cle within a safe di sta nce.
• Tir es on a ve hic le th at ha s bee n ov erlo ad ed c an fail sudd enl y,
in clu din g a bl owout and sud den d efl atio n, ca usi ng loss of con trol
and a crash .
• Al ways m ake sur e th at the total lo ad being tr ansp orted -
includin g th e w eight of a tr ailer hitch and th e tong ue weight of a
load ed tr ailer -do es not m ake the vehi cle he avie r than the
vehicle 's Gro ss Vehicl e W eight R ating. •
Vehicle care

1119...__T_ ir_e _ s_ a_ n
_ d_ w_ h_ e_ e_ls _________________________________________________ _
Incorrect wheel alignment
Incorrect wheel alignment can cause excess ive tire wea r, impairi ng
the safety of the vehic le. If tires show excessive wear, have the
whee l alignment c hecked by an au th o rize d Audi deale r or qualifie d
wo rkshop.
All Wheel Drive
Vehicles with quattro® must always have tires of the same size, construc tion and tread type. F or details see
~ p age 273 .
& WARNING
Sudden tire failure can lead to los s of control, a crash and serious
personal injury !
• Never drive a vehicle when the tread on any tire is worn down
to the wear indi cators .
• Worn tires are a safety hazard, they do not grip well on wet
roads and increase your risk of "hydroplaning " and loss of control.
• Always keep chemicals that can cause tire damage , such as
grease, oil , gasoline and brake fluid aw ay from tires .
• Tires age even if they are not being used and can fail suddenly ,
especially at high speeds. Tires that are more than 6 years old can
only be used in an emergency and then with special care and at
lower speed s.
• Never mount used tires on your vehicle if you are not sure of
their "previous history." Old used tires may have been damaged
even though the damage cannot be seen that can lead to sudden
tire failure and los s of veh icle control. •
New tires and replacing tires and wheels
N ew t ires and wheels h ave t o be broke n in.
Fig . 2 76 T ir e specification code s on the sidewall of a tire
No .
G)
0
©
©
©
©
Description
Passenger car tire (where applicable)
Nominal width of tire in millimeters
Ratio of height to width (aspect ratio)
Radial
Rim diameter code
L o ad in dex and s peed rat ing

Tires and wheels 11111 --------------------------------------------
•
Wheel bolts
Wheel bolts must al wa ys be tightened to the correc t
tor que .
The design of wheel bo lts is matched to the factory installed rims. If
di fferent r ims a re fitted, t he co rrect w heel bo lts wi th the rig ht len gth
and correct ly shaped bolt heads m ust be used. This ensures that
w he els a re fitt ed se cu rel y and that t he bra ke syste m functi on s
correctly.
In certa in ci rc ums ta nces, yo u may no t use wheel bo lts fr om a
differ ent vehicle - eve n if it is the sa me
model=:> page 382.
& WARNING
Improperly tightened or maintained wheel bolts can become loose
causing loss of control, a collision and serious personal injury.
• Always keep the wheel bolts and the threads in the wheel hubs
clean so the wheel bolts can turn easily and be properly tightened .
• Never grease or oil the wheel bolts and the threads in the wheel
hubs. They can become loose while driving if greased or oiled,
even if tightened to the specified torque .
• Only use wheel bolts that belong to the rim being installed .
• Never use different wheels bolts on your vehicle.
• Always maintain the correct tightening torque for the wheel
bolts to reduce the risk of a wheel loss .
If the tightening torque of
the wheel bolts is too low, they can loosen and come out when the
vehicle is moving . If the tightening torque is too high, the wheel
bolts and threads can be damaged and the wheel can become
loose .
0 Note
The specified torque for the wheel bo lts is 9 0 ft lb (12 0 N m) with a
t olerance o f± 7,4 ft lb(± 10 Nm). T orque whee l bolts diago nally.
After changing a whee l, the torque must be checked as soon as possible with a torque wrench
-preferably by an authorized Audi
dea ler o r qua lif ied wo rksho p.•
Low aspect ratio tires
You r Aud i is fact ory- eq uip pe d w it h lo w aspect rati o tire s. T hese tir es
hav e been thorough ly t ested and been se lect ed specifical ly for your
mod el for thei r supe rb pe rf or manc e, r oad f eel an d ha nd ling under
a variety of driving conditions. As k your authorized Audi d ealer for
m or e de tails.
The low aspect rat io o f th ese t ires is indicat ed by a nume ra l of 55 or
less in the tire's size designatio n. The numeral represents the ratio
o f t he tir e's s idewa ll he ig ht in r ela ti on to it s tread w idt h ex pressed
in percentage . Conventiona l tires have a height/width ratio of 60 or
more.
The performan ce of low -aspe ct-ratio tires is particularly sensitive to
improper inflation pressure . It is therefore important that low
aspect ratio tires are inflated to the specified pressure and that the
inflation pressure is regularly checked and maintained . Tire pres­
sures should be checked at least once a month and alway s before a
long
trip :::::, page 331, "Checking tire pressure" .
What you can do to avoid tire and rim damage L ow a spect ratio tires can be damaged mo re easily by impact with
pot ho les, cu rbs, gull ies o r ridge s o n th e road, part icular ly if th e tire
is underinf lated .
I n or der to mini mize th e occurren ce of i mpac t da mag e to the tires
of your vehicle, we recommend that you observe the fol lowing
pr ecaut ions :
• Alwa ys m aint ain recom mended inflatio n pressu res . C he ck you r
t ire p res su re eve ry 2,000 mi les (3, 000 k m) and add ai r if neces sary .
• D rive carefully on roads with potho les, deep gullies or ridges .
The impac t from d riving th rough or ove r such o bstacles can
da mage you r tir es . Imp act with a curb may a lso caus e damage to
your tire s. .,_
Vehicle care

1111....__F_ u_ s_ e_s _ a_n _ d_ b_ u_lb _ s _______________________________________________ _
Fuses and bulbs
Fuses
Repl ac ing a fu se
A problem in the electrical system may be caused by a
blown fuse.
F ig . 29 1 I nstrume nt
pa nel l eft : Face cov er
Fi g. 29 2 I nstru m ent
p an el l eft : C ont en t
F ac e cove r
- Locate the fuse which belongs to the component which
failed.
- Switch off the ignition and the electr ical component
affected. -
Carefully pry the face cover off the instrument panel
using t he ign ition key or a screwdriver=> fig . 29 1.
- Remove the plastic
clip @ from i ts retain er in the face
cove r=> fig. 292, place it over the questionable fuse an d
remove the fuse.
- Re place a b low n fuse (recog nizable by the melted metal
s tri p inside) with a fuse of the
same amperage.
The individual circuits are protected by fuses. The fuse panels with
the fuses are located on the left and right front faces of the instru­
ment panel behind a cover and in the left and right storage areas in
the luggage compartment.
There is a plastic
c lip @ in the cover on the left side of the instru ­
ment panel, which can be used to remove the fuses . The
crank @ is
used for emergency operation of the power roof *. You wi ll also find
a labe l on both covers in the instrument panel w ith the fuse layout
© for the corresponding fuse panel.
& WARNING
Nev er r ep la ce a fu se with one tha t has a hi gher amperage rating.
• A fuse w ith a to o high amper ag e cou ld dam age th e ele ctrical
part and c au se a fire .
0 Note
• On no account should fuses be repaired (e .g. patched up with tin
foil or wire) as th is may cause serious damage elsewhere in the elec ­
trical circuit or cause fire .
• If a fuse blows repeatedly , do not keep replacing it. Instead, have
the cause of the repeated short circuit or overload located and fixed
. ...

_________________________________________________ F_ u_ s_ e_s _ a_n _d_ b_ u
_ lb_ s _ __.11111
[ 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

_________________________________________________ F_ u_ s_ e_s _ a_n _d_ b_ u
_ lb_ s _ __,_
-
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

lffll....__E_ m_ e_r -=g :....e_ n
_ c-=y _ s_ i_t _u _a _t_ i_o _n_ s _______________________________________________ _
-Read and hee d WARNI NG =:> & .
Fig. 305 Re ar lifting
point
Ac tivate t he vehicle jackin g mode if a pp licable
=:> p age 188 .
-Loc ate lift ing po in ts=:> page 369 , fig. 3 04 =:> fig. 3 05.
Ad just lift in g a rms of works hop hoi st or floor jack t o
match ve hicle li ftin g points.
Ins ert a ru b be r pad betwe en the floor jack/work shop
h o ist and t he li ftin g poin ts.
The vehicle jacki ng m ode mus t be ac tiva ted so that the au tomatic
adjustment of the Adaptive Air Suspension does not make it more
d ifficu lt to ra ise the vehic le w ith the (floor
jac k) => page 188 .
If you must lift your vehicle with a floor jack to work underneath , be
sure the vehicle is safely supported on stands intended for this
purpo se.
Front lifting point
T he lif ti ng po int is locat ed o n th e floor pan re inforc ement abou t at
the same level as the jack mounting
point => page 3 69, fig. 304. Do
not lift the vehicle at the vertical sill reinforcement. Rear lifting point
Th
e lif tin g po int is loca ted o n the vertical re info rce ment of the l ower
s ill for t he o n-board
jack=> fig . 305.
Lifting with vehicle jack
Refer to => page 354.
& WARNING
• To reduce the risk of serious injury and vehicle damage.
-Always lift the vehicle only at the special workshop hoist and
floor ja ck lift points illustrated
=> page 369 , fig. 304 and
=> fig . 305.
- Failure to lift the vehicle at these points could cause the
vehicle to tilt or fall from a lift if there is a change in vehicle
weight distribution and balance. This might happen , for
example , when heavy components such as the engine block or
transmission are removed .
• When removing heavy components like these, anchor vehicle
to hoist or add corresponding weights to maintain the center of gravity. Otherwise , the vehicle might tilt or slip off the hoist,
c ausing serious personal injury .
0 Note
• Be awar e of the following points before lifting the vehicle :
-The vehicle should never be lifted or jacked up from under­
neath the engine oil pan , the transmission housing , the front or
rear axle or the body side members . This could lead to serious
damage .
-To avoid damage to the underbody or chassis frame , a rubber
pad must be inserted between the floor jack and the lift point s.
- Before driving over a workshop hoist, check that the vehicle
weight does not exceed the permissible lifting capacity of the
hoid . ~

General information -
----------------
vehicle identification number of your vehic le (perforation) as well as
th e G ross Veh icle Weight Ra ting (GVWR) an d the Gross A xle We ig ht
R ating (GAWRl .
The high voltage warning label is located on the lock carrier.
The spark ignition system complies with the Canadian
standard ICES-002 . •
Displaying Vehicle Identification
Number in MMI
Fig . 308 MMI di spl ay:
Vehicle ID number
!V IN}
You can also displa y th e Vehi cle Id ent ifi cati on Numbe r of
yo ur vehi cle in MM I.
- Press th e
( CARI fun ctio n bu tton.
- Selec t
Systems in the CA R me nu.
- Selec t
Vehicle ID number (VIN) . The Vehicle ID number
(VIN)
menu appea rs => fig. 3 08 . •
Controls and equip­
ment Safety first Vehicle operation
Weights
Gross Vehicle Weight Rating
The G ross Ve hicle W eig ht Rat ing (GVWR), a nd the Gross A xle W eight
Rating (GAWR) for front and rear are listed on a stic ker on the left
doo r jamb .
T he G ross Ve hicle We ig ht Rat ing includes t he weig ht o f the bas ic
vehic le plus full fue l tank, oil and coo lant, p lus maximum load,
w hi ch includes passe nge r we ight (1 50 lbs/68 kg per des ig nated
seat ing position) and luggage weight .
Gross Axle Weight Rating
The Gross Axle Weight Rating is the maximum load that can be ap plied at eac h axle o f th e
ve hicle~ &.
Vehicle capacity weight
The ve hicle capacity weig ht (m ax. load) is listed either on the
d river's side B -pillar or inside the fuel fi ller flap .
Roof weight
The max im um p erm issib le roo f weight i s 220 lb (100 kg ). The ro of
we ight is made up o f the we ight of the roof rack system and th e
we igh t of the o bjec t being
tr anspo rted ~ page 10 4, "Lo ad in g the
roo f rac k".
& WARNING
• The actual Gross Axle Weight Rating at the front and rear axles
should not exceed the permissible weights , and their combination
must not e xceed the Gross Vehicle Weight Rating .
• Exceeding permissible weight ratings can result in vehicle
damage , accidents and personal injury .
Vehicle care Do-it-yourself service Technical data

llffl __ G_ e_n_ e_ r_
a _l _i_n _f _o _ r_ m_ a_ t_ i_ o _ n ________________________________________________ _
0 Note
• The ve hicle capacity weight figures apply when the load is
distributed evenly in the vehic le (passengers and luggage) . When
tra nsporting a heavy load in the luggage compartment, carry the
load as near to the rear ax le as possible so that the vehic le's
h a ndl ing is not impaired .
• Do not exceed the maximum permissib le a xle loads or the
max imum gross veh ic le we ight. Always remember t hat the ve hicle's
handling wil l be affected by the extra load. Therefore, adjust your
speed accord ingly .
• Always observe local regulations .•
Dimensions
The specifications refer to the basic mode l. Differences may occur
depend ing on t he mode l ty pe a nd options or dere d, fo r exam ple, t ire
sizes.
0 Note
When driving up steep ramps, on rough roads, over curbs, etc. it is imp ortant to remem ber tha t som e parts o f you r ve hicle, such as
spoilers or exhaust system components, may be c lose to the
ground. Be carefu l n ot to damage t hem .•