2010 AUDI S8 check engine

Checking and filling ------------------------------- ---=.:..:..=.:=~..:::..:.....:..:.;__ ___ _::,______,.J
& WARNING (co ntinued )
• Antifreeze is pois onous. Alway s store antifreeze in its original
container and well out of the r each of children.
• If you drain the coolant , it must be caught and safely stored in
a proper container clearly marked "poi son ".
0 Note
• Coolant poll utes the environment and could cause an engine fire .
Excess coolant w ill be forced out throug h the pressure re lief valve in
t he cap when the e ng ine becomes hot .
• If, in an emergency, o nly wate r ca n be adde d, the correct ratio
between water and antifreeze=>
page 296 must be restored as soon
as possib le.
W For the sake of the environment
Dra ined coolant shou ld not be reused. A lways dispose of used coo lant
w hile observ ing a ll enviro nment al regul ations . •
Radiator fan
The radiator fan switches on automatically by itself
T he radi ator fa n is d riven by the engine via th e V-bel t. The v iscous
clutch regu lates the speed of the fan accord ing to the temperature of
t he coolant.
An auxiliary e lectr ic rad iator fan* sw itches on and off depend ing o n
coo la nt tempe rat ur e and othe r vehicle ope ra ting condi tions .
After you switch the engi ne off, the auxilia ry fa n can cont inue r unning
for up to 10 minutes - even w ith the ignition off . It can even switch on
agai n lat er by itse lf => & , if
• the tempe rature of the e ngine coolant rises due to the heat build ­
up from the eng ine in t he engi ne comp art ment, or
Vehicle OP-eration
• the engine compartment heats up because the veh icle is parked in
in tense s unlight.
& WARNING
• To reduce the ri sk of personal injury never touch the radiator
fan.
• The auxiliary electri c fan is temperature controlled and can
switch on suddenly even when the engine is not running .
• The auxiliary radiator fan switches on automatically when the
engine coolant reaches a certain temperature and will cont inue to
run until the coolant temperature drops .•
Brake fluid
Checking brake fluid level
T h e b rake fluid l evel can be ch ecked with a quick glance.
-w ;:;
Fig. 24 8 En gine
compa rtme nt: Brak e
f luid re se rv oi r
Be fore you chec k anyt hin g in the engine compartment,
always read and heed all WARNINGS~ & in "Working in
t h e engine compartm ent" on
page 289 . .,_
Vehicle care Do-it-yourselt service iTechnical data

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- Read the brake fluid level from the brake fluid reservoir
=> fig. 248 . T he brake fluid level mus t be between the
" M IN" and "MAX" markings.
The br ake fl uid re se rvoir is loc ated at the rear pa rt iti on of the engine
compartment on the left side~ page 290.
T he f lu id level may drop slightly after some time due to the auto­
matic adjus tment of t he b rake pads. This is not caus e for alarm.
If the brake flu id leve l falls considerably below the "MIN" mark, t he
br ak e wa rning/ind ic ator lig ht ( U.S . model s:
BRAKE , Can adi an mod els:
«D> ) will come on~ page 20 and~ page 28. Do not continue to
operate the vehicle . The comple te brake system sho uld be thoro ughly
checked by an author ized A udi dealer or ot her qualified facility and
t he ca use correcte d. If the b rake fl uid leve l is too low, the bra ke
wa rning/in dicator light will illu mi nate . Con tact an au thorized Aud i
dealer
immediately .•
Changing brake fluid
H ave the brake flui d changed by an ex perienc ed techni­
cian.
Brake flui d abso rbs mois ture from t he a ir . If t he wa ter con ten t in the
brake fl uid is too hig h, corros io n in the b rake system may res ult afte r
a period of time . The boiling po int o f the bra ke fl uid will also decrease
cons iderab ly and decrease brak ing perfo rmance.
The refore, the brake fl uid m ust be changed
every two years . Always
use new bra ke fluid w hich conforms to Fede ral Motor Veh icle St an­
dard "FMVSS 116 DOT 4" .
Th e b rake fl uid reservoi r ca n be diffi cult to rea ch, there fore, we
recommend that you have the bra ke fluid c hanged by your author ized
Audi dealer. Your dea ler has the correct tools, the right b rake fl uid
and the know-how to do t his for you .
& WARNING
• Brake fluid is poisonous. It must be stored only in the closed
original container out of the reach of children!
• Brake failure can result from old or inappropriate brake flu id.
Observe these pre cautions:
- Use only brake fluid that meets SAE specification
J 1703 and
conforms to Federal Motor Vehicle Standard 116. Always che ck
with your authorized Audi dealer to make sure you are us ing
the correct brake fluid. The correct type of brake fluid i s also
indicated on the brake fluid reservoir .
- The brake fluid must be new. Heavy use of the brakes can
cause a vapor lock if the brake fluid is left in the system too
long . Thi s can seriously affect the efficiency of the brakes as
well as your safety . This could result in an accident.
0 Note
Brake fluid will damage the paint of your ve hicle .
~ For the sake of the environment
Because of the prob lem of proper disposal of brake fl uid as we ll as
the spec ia l too ls req uired and the necessary expe rtise, we recom ­
m en d that you have t he brake fl uid changed by your autho rized Audi
dea ler .•
Battery
General information
Under normal operat ing condit ions, the battery in your Aud i does not
nee d any m ain ten ance. Wi th high outs ide temper atures o r long d aily
dr ives we recommend that yo u have the elect rolyte level checked by .,_

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The battery is located in the luggage compa rtment on the
right side beh ind a cover. Before you check anything in the
luggage compa rtmen t, read and heed all WARNINGS=>& .
- To open the side sto rag e com part me nt, turn the tw o pins
@ =>fig . 24 9 to th e vert ical position .
The positive( +) battery termina l is p rotected by a plastic cov er. This
cover must be removed to access the positive( +) terminal when
c onnect ing jumpe r cab les to sta rt the engine.
Always heed the safety warnings, when working on the vehicle
bat tery or the vehicle e lect ric al system to p revent injury .
The following WARNINGS are very important when
working on the battery:
Always heed the following WARNING SYMBOLS and safety pre­ cautions when working on the battery.
-
®
Always wear eye protection.
Battery acid contain s sulfuric acid. Always wear
gloves and eye protection .
No
- sparks
- flames
- smoking .
When a battery is charged, it p roduces hydrogen
gas which is explosive and could cause personal
injury .
Always keep the battery well out of reach of chil­
dren .
& WARNING
Whenever working on the battery or on the electrical system,
there i s the ri sk of injury, a ccident and even fire. Read and heed
the following WARNINGS:
• Alway s wear eye protection . Do not let batt ery acid or any lead
part icles get on your skin or clothing. Shie ld your eyes. Explosive
ga se s can cause blindnes s or other in jury.
• Battery acid contains sulfuric acid. Sulfuric acid can cause
blindne ss and severe burns .
- Always wear gloves and eye protection . Do not tilt the
battery becau se acid could leak out of the ventilation open­
i ngs.
- If you get battery acid in your eyes or on your skin, immedi­
a tely rinse with cold water for several minutes and get medical
attention .
- If you should ingest any battery acid , see k medical attention
immediately.
• Do not expose the battery to an open flame, elect ric sparks or
an open light .
• Do not smoke.
• Do not interchange the positive and negative cables.
• When working on the battery, be sure not to short-circuit the
term inals with tools or other metal objects. This would cause the
battery to heat up very quickly, which could lead to damage or
e x plos ion and personal injury.
• When a battery is charged, it produce s hydrogen ga s wh ich is
e xplos ive and could cause pe rsonal inju ry.
• Alway s keep the battery well out of the reach of children .
• Before work is done on the ele ctrical system , disconnect the
negative ground cable.
• Before performing any work on the electrical sy stem , switch
off the engine and ignition as well as any electrical equipment.
The negative cable on the battery mu st be disconnected. If you are
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of properly in compliance with all environmental regulations .
Disposing of vehicle batter ies improperly is
very dangerous to the
environment .•
Windshield/headlight washer
container
F ig . 251 E ngine
compa rtme nt: W ind·
sh iel d and h eadlight
w asher flu id con tainer
The washer fluid container is marked wi th the symbol ~ on
its cap.
- Before you check anything in the engine compartment,
always read and heed all WARNINGS~ & in "Working
in the engine compartment" on page
289.
- Lift the filler cap tongue to add washer fluid. You can fill
the container to the top.
- Press the cap back onto the filler neck a fter filling the
container.
You can find the reservoir capacity i n the table in~ page 360 .
To p revent lime residue from bui ld in g up on the spray jets, use
distilled wate r when refilling . Always add a glass cleaner solution
(with frost p rotection in the winter) .
Vehicle OP-eration
0 Note
Do not mix engine coo lant antifreeze o r any other additives to fill up
the w indshield wash er reservoir .•
Vehicle care Do-it-yourselt service iTechnical data

What do I do now? -____________________ .:..::......:..:...___Wi'.'11
- Disengage and lower the floor panel before you close the
luggage compartment lid again.
Storing the replaced wheel
-Place the replaced wheel inside the spare wheel well in the
luggage compartment.
Tighten the knurled retaining screw clockwise to secure
the wheel in place.
- Disengage and lower the floor panel before you close the luggage compartment lid again.
& WARNING
Loose items in the passenger compartment can cause serious
personal injury during hard braking or in an accident.
• Never store the spare wheel or jack and tools in the passenger
compartment.
• Always store all jacking equipment, tools, and the spare wheel
in the luggage compartment.
• Tighten the knurled retaining screw for the spare wheel
securely.
[I] Tips
Check the inflation pressure of the spare tire periodically to keep the
tire ready for use .•
Safety first
Changing a wheel
Before changing a wheel
Observe the following precautions for your own and your
passenger's safety when changing a wheel.
- After you experience a tire failure, pull the car well away
from moving traffic and try to reach
level ground before
you stop ~& .
- All passengers should
leave the car and move to a safe
location (for instance, behind the guardrail)~& .
- Engage the
parking brake to prevent your vehicle from
rolling unintentionally~ &.
- Move
selector lever to position P ~ & .
- If you are towing a trailer: unhitch the trailer from your
vehicle.
- Take the
jack and the spare tire out of the luggage
compartment~
page 333 .
& WARNING
You or your passengers could be injured while changing a wheel if
you do not follow these safety precautions:
• If you have a flat tire, move a safe distance off the road. Turn
off the engine, turn the emergency flashers on and use other
warning devices to alert other motorists.
• Make sure that passengers wait in a safe place away from the
vehicle and well away from the road and traffic.
• To help prevent the vehicle from moving suddenly and possibly
slipping off the jack, always fully set the parking brake and block
the wheel diagonally opposite the wheel being changed. When
one front wheel is lifted off the ground, placing the Automatic ..,
Vehicle care Do-it-yourself service Technical data

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& WARN ING (conti nued)
• Before you check anything in the engine compartment , always
read and heed all WARNINGS~
page 281, "Engine compart­
ment ".
0 Note
• App lying a higher vo ltage booster battery will cause expensive
damage to sens itive e lectron ic components, such as contro l units,
relays, radio, etc.
• There must be no electrical contact between the vehicles as other­
wise 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 nega­
tive 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. •
Vehicle OP-eration
Use of jumper cables
Make sure to connect the jumper cable clamps in exactly
the order described below!
Fig. 282 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. 282 © 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 iTechnical data

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4. C onn ect the ot her end to the negative ground post of the
battery manager control unit located nex t to the battery .
Starting the engine
-Start the engine o f th e vehicle with the booster battery .
Ru n the engine at a mode rate speed.
- Start engine with discharged vehic le battery in the usua l
manner.
- If the e ngine fai ls to star t: do no t keep the s tarter
crank ing for longer than 10 seconds . Wait for about 30
seconds a nd then try aga in.
- With eng ine runni ng, remove jumper cables from bot h
veh icles in t he exact
reverse order.
T he b att ery is ven ted to the outside to p reve nt gases from en ter ing
the vehicle interior. Make sure that the jumper clamps are well connected wi th their
metal parts in full contact with the battery
terminals.
& WARNING
To avoid serious personal injury and damage to the vehicle, heed
all warnings and in stru ction s of the jumper cable manufa cturer . If
in doubt , call for road service.
• Jumper cable s mu st be long enough so that the vehicle s do not
touch.
• Wh en connecting jumper cables, make sure that they cannot
get caught in any moving part s in the engine compa rtment.
• Before you check anything in the engine compartment, always
read and heed all WARNINGS~
page 281, "Engine compart­
ment ".
0 Note
Improper hook-up of jumpe r cables can ruin the generator.
• Always connect POS ITIVE(+) to POS ITIVE(+), and NEGA TIVE(-)
to NEGATIVE (-) ground post of the battery manager co ntrol unit .
• Check t hat all s crew p lugs on t he b attery cells are screwed in
firm ly . If not, tighten plugs pr ior to co nnecting clamp on negative
battery terminal.
• Please note that the procedure for connecting a jumper cable as
descr ibed above appli es specifically to the case o f yo ur vehi cle be in g
jump started. W hen you are giving a jump sta rt to another vehicle, do
not connect the negative (-) cab le to t he negative ( -) termina l on the
discharged battery©~
page 349, fig. 282 . Instead, securely
connect the negative(-) cable to either a solid metal component that
is firmly bolted to t he eng ine b lock o r to the eng ine b lock itself. If the
battery that is being charged does not vent to the outside, escap ing
b attery gas could ignite and exp lode! •
Emergency towing with
commercial tow truck
General hints
Your Audi requires special handling for towing.
Th e fo llow ing in forma tion is to be used by commerci al tow tru ck
operators who know how to operate their equ ipment safely .
• Never to w your Aud i, towing will cause damage to the eng ine
and tran smi ssion .
• Neve r wrap the safety chains or winch cable s around the b rake
lines.
• To prevent unnece ssary damage, your Audi must be transported
with a flat bed truck . _.,

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-Read and heed WARN ING=> &.
Fig . 29 0 Rear lift ing
poi nt
- Activa te the vehicle jacking mode if ap plicab le
=>page 179 .
- Locate lift ing poi nts=> page 353, fig . 289 => fig. 290.
- Adj ust lift ing arms of wor kshop ho ist or floor jack to
match vehicle lifting poi nts .
- Inse rt a rub ber pad between th e floor j ac k/wo rksho p hois t
and t he lifting points .
The ve hicle jacking mode mus t be activa ted so that the automa tic
adjustm ent of the Adapt ive A ir Suspens io n does not make it more
diffic ult to raise the vehicle wit h the (floor jack)=>
page 179.
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
Th e lifting poi nt is loca ted on the floo r pan reinforcemen t about at
the same leve l as the jack mo unting point =>
page 353, fig. 289. Do
not lift the vehicle at the verti cal sill reinfor cement .
Rear lifting point
The li fting point is located on the ve rt ica l reinfo rceme nt of the lower
sill for the on-board jack=> fig. 290.
Lifting with vehicle jack
Refer to=> page 338.
& WARNING
• To reduce the risk of serious injury and vehicle dam age.
- Alway s lift the vehicle only at the special workshop hoist and
floor jack l ift points illustrated =>
page 353, fig. 289 and
=> fig. 290 .
- 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 e xample , when heavy component s such as the engine block or
transmission are removed .
• When removing heavy components like these, an chor vehicle
to hoist or add correspond ing weights to maintain the center of
gravity . Otherwi se , the vehicle might tilt or slip off the hoist,
caus ing serious personal injury.
0 Note
• Be aware of th e following points before lifting th e vehicle :
-The vehicle should neve r be lifted or jacked up from under ­
neath the eng ine 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 rubbe r
pad must be inserted between the floor ja ck and the lift points.
- Before driving over a workshop hoist , check that the vehicle
weight does not exceed the permissible lifting capacity of the hoist . _..