2008 AUDI S6 oil

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When the coolant level is too low , the warning light in the Auto­
Check System =>
page 33will blink un til you add coo lant and the
level has been restored to normal. Even though there is an electric
coolant leve l sensor, we still recommend you check the coo lant level
from time to time .
Coola nt lo ss
Coolant loss may indicate a leak in the cooling system . In the event
of coolant loss, the coo ling sys tem should be inspected immedi ­
ately by your authorized Audi dealer . It is not enough merely to add
coolant.
In a
s ealed system, losses can occur only if the boiling po int of the
coolant is exceeded as a result of overheating.
0 Note
Do not add any type of radiator leak sea lant to your vehicle's engine
coolant . Adding radiator repair fluid may adversely affect the func ­
tion and performance of your cooling system and could resu lt in
damage not covered by your New Vehic le Limited War ranty .•
Adding coolant
Be very careful when adding engine coolant.
Before you check anything in the engine compartment,
always read and heed all WARNINGS => & in "Working in
the engine compartment" on
page 297 .
- Tu rn off the engine .
- L et the engine coo l dow n.
- Place a t hick rag over the coolant expansion tank
=> page 304, fig . 235 and carefully tw ist t he cap counter­
cloc kw ise
=> & .
- Add coolant. - Twist the cap
on agai n
tightly.
Replacement engine coolant must conform to exact specifications
=>
page 303, "Coolant". If in an emergency coolant additive G12 + is
not avai lable, do
not use a different additive . Use p lain water
instead until you can get the correct additive and can restore the
correct ratio . This should be do ne as soon as possible.
If you have lost a considerable amount of coolant, then you should
add cold antifreeze and cold water only when the engine is cold .
Always use
new engine coolant when refilling .
Do not fil l coolant above the "MAX" mark. Excess coolant will be
forced out through the pressure relief va lve in the cap when the
engine becomes ho t.
& WARNING
• The cooling system is under pressure and can get ver y hot.
Redu ce the risk of sc alding from hot coolan t by follow ing the se
s tep s.
- Turn off th e en gine and allo w it to cool down .
- Protect your fa ce , ha nd s and arm s from e sc a pi ng fluid and
s tea m by cov ering the c ap with a large , thick rag.
- Tur n the cap slo wly an d very ca refully in a counter -clockw is e
dire ction whil e applying light , downward pres sure on the top
o f the cap.
- To av oid bei ng burn ed , do n ot spill antifree ze or cool ant on
the e xhau st sy stem or h ot e ngi ne part s. Under cert ain co ndi­
tion s, the ethylen e gl ycol in engin e co olant c an c atch fire .
• Antifr eeze is po iso nous. Alwa ys store antifree ze in its or igin al
c ontainer and well out of the reach of c hildren .
• If you dra in t he coola nt, it mu st b e ca ught and sa fel y stor ed in
a prop er container clearly mark ed "poi son ".
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Vehicle care I t •

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T he fluid level may drop slightly after some time due to the auto­
m atic adjustment of the brake pads. This is not cause for alarm .
If the brake fluid level fal ls
considerably below the "MIN" mark , the
brake warning/indicator light (U.S. models :
BRAKE, Canadian models:
{(j))) will come on~ page 23 and ~ page 32. Do not continue to
operate the vehic le. The complete brake system should be thor ­
oughly checked by an authorized Audi dealer or other qua lified
facili ty and the cause corrected . If the brake fluid level is too low, the
brake warning/indicator l ight will illuminate. Contact an au thorized
Audi dea ler
immediate ly .•
Changing brake fluid
Have the brake fl uid changed by an experienced techni­
ci an.
Brake fluid absorbs moisture from the air. If the water content in the
brake fluid is too h igh, corrosion in the brake system may result
after a period of time. The boiling point of the brake fluid will also
decrease considerab ly and decrease braking performance .
Therefore , the brake fluid must be changed
e v ery tw o year s. Always
use new brake fluid which conforms to Federal Motor Vehic le Stan ­
dard "FMVSS 116 DOT 4".
T he brake fluid res ervoir can b e difficult to reach, th erefore, we
recommend that you have the brake fluid changed by your autho ­
rized
Audi de aler . Your dealer has the correct tools, the right brake
fl uid and the know -how to do t his fo r you .
& WARNING
• Brake fluid is poi sonous . It mu st be stored onl y in the clo sed
o riginal cont ainer out of the rea ch of children!
• Brake failure c an re sult from old or inappropri ate br ake flu id .
Obs erv e the se pre caution s:
& WAR N IN G (c ontinued )
-Use only brake fluid that meet s SAE specification J 1703 and
c onfo rm s to Feder al Moto r Vehicle St andard 116 . Al wa ys check
w ith your authori zed Audi dealer to make sure you are u sin g
the corre ct b rake flu id. The cor rect type of br ake fluid is als o
indic ated on the brake fl uid reservoir .
- The brake fluid mus t be ne w. Heav y use of th e brake s can
ca use a vapor lock if the bra ke fluid i s left in the sy stem too
long . Thi s can seriou sly affect the efficiency of the brake s as
w ell as your s afety . This could r esult in an a ccident .
0 Note
Brake fluid will damage the paint of your vehicle .
Because of the p rob lem of proper disposal of brake fluid as well as
the special too ls required and the necessary expertise, we recom­
mend that you have the brake fluid changed by your authori zed Audi
dea ler .•
Battery
General information
Und er n ormal operating conditions, the battery in your Audi does
not need any maintenance. With
high outside temperatures or long
daily drives we recommend that you have the electrolyte level
checked by a se rvice facility . The e lectrolyte level should a lso be
checked each time the battery is charged~
page 310 .
Have the batte ry checked when you take your vehic le in for service.
You are well advised to replace a battery that is o lder than 5 years . _,,
Vehicle care I t •

Tires a nd wh eels -
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Tires and wheels
Tires
General notes
Tires may be the least appreciated and most abused parts
of a motor vehicle.
Tires may be the least appreciated and most abused parts of a
motor vehicle. Tires are, however, one of the most important parts
of a vehicle, particularly considering the comparative ly sma ll patch
of rubber on each tire that assures that all- important contact
between you, your vehicle and the road .
Maintaining the correct tire pressure, making sure that your vehicle
and its tires do not have to carry more weight than they can safely
handle, avoiding damage from road hazards and regu lar ly
inspecting tires for damage inc luding cuts , slashes irregular wear
and overa ll condition are the most important things that you can do
to help avoid sudden tire failure including tread separation and
b lowouts .
Avoiding dama ge
If you have to drive over a curb or similar obstacle, drive very slow ly
and as close as possible at a right angle to the curb.
A lways keep chemica ls includ ing grease, oil, gasoline and brake
f luid off the tires.
I nspec t the tires regularly for damage (cuts, cracks or blis ters, etc.l.
Remove any foreign bodies embedded in the treads.
Storing tires
Mark tires when you remove them to indicate the direction of rota ­
tion . This ensu res you to be ab le to mount them correctly when you
reinstal l them. When removed, the wheels or tires shou
ld be stored in a coo l, dry
and preferably dark place.
St ore t ires in a vertical posit ion if they a re not mounted on rims, in
a horizontal position if they are mounted on rims.
New tire s
New tires have to be broken in~&.
The tread dep th of new tires may va ry, according to the type and
make of tire and the tread pattern.
Hidden d ama ge
Damage to tires and rims is often not readily visible. If you notice
unusua l vibration or the vehicle pul ls to one side, this may indicate
that one of the tires has been damaged . The tires must be checked
immed iately by an authorized Audi dealer or qualified workshop .
Unidire ction al tir es
A unidirectio nal tire can be iden tif ied by arrows on the s idewa ll, that
point in the direction the tire is designed to rotate. You must follow
the specified direction of ro tation . This is necessary so that these
tires can deve lop their optimum characteristics regarding grip, road
noise, wear and hydroplaning resistance . For more information
~ page 344.
in. WARNING
Ne w tire s or tire s that are old , worn or damaged cann ot pro vide
m aximum cont rol and braking ability.
• New tire s tend to be slippe ry and m ust be broken in . To redu ce
the risk of losing control, a colli sion and seriou s per sonal injurie s,
drive with speci al care for t he fi rst 350 m ile s ( 560 km l.
• Driving with worn or damaged t ire s can lead to lo ss of co ntrol ,
s udd en tire failure , in clu ding a blowout a nd sudden deflation , .,,_
Vehicle care
I t •

-~_T_ ir_e_ s_ a_ n_d _ w_ h_ e_e _l_s _________________________________________________ _
& 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 designed to operate at higher loads and at higher infla ­
tion pressures than the corresponding standard tire . Extra load tires
my 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"l
means the maximum total loaded weight of the vehicle.

Tires and wheels -________________ lf:HIIII
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& WARNING (continu ed )
• Only when all tires on the veh icle are filled to the correct pres­
s ure , the tire pre ssure monitoring sy stem can work correctly .
• The use of incorrect tire pressure values can lead to accidents
or other damage. Therefore it i s es sential that the driver observe
the specified tire pre ssure values for the tires and the correct pres­
s ures for the function of the tire pressure monitoring system.
• Alway s inflate tires to the recommended and correct tire pres ­
sure before driving off .
• Driving with underinflated tires bend more , letting them get
too hot re sulting in tread separation , sudden ti re failure and loss
of control.
• Ex cessive speed and /overloading can cause heat build -up ,
sudden tire failure and loss of control.
• If the tire pressure is too low or too high, the tires will wear
prematurely and the vehicle will not handle well .
• If the tire is not flat and you do not have to change a wheel
immediately , drive at reduced speed to the nearest service stat ion
to che ck the tire pressure and add air as required .
0 Note
Driving without valve stem caps can cause damage to the tire
valves. To preven t this, a lways make su re t hat facto ry instal led
va lve
stem caps on a ll whee ls are securely mounted on the va lve .
'£> For the sake of the environment
Underinflated t ires will a lso increase the fuel consumption. •
Tires and vehicle load limits
There are limits to the amount of load or weight that any vehicle and
any t ire can car ry. A vehicle that i s ove rlo aded wil l n ot hand le well and
is more difficu lt to stop . Overloading can not only lead to loss
o f ve h ic le control, but ca n also damage impor ta nt parts o f the
vehic le and can lead to sudden tire fa ilure, inc luding a blowout and
sudden defla tion that ca n cause the vehic le to cra sh .
Your sa fety and that o f your passe ngers also depe nds on mak ing
sure that load limits are not exceeded . Vehicle load includes every ­
b ody and everyth ing in and on t he veh ic le . T hese load lim its a re
technica lly referred to as the vehicle's
Gross Vehi cle We ight Rating
(" GVWR"l .
The "GVWR" includes the weight of the basic veh ic le, all factory
insta lled accesso rie s, a ful l tank of fuel , oil, coolant an d other fluids
p lus max imum load. T he ma xim um load inc ludes the number o f
passe ngers that the veh icle is intended to carry ("seat ing capacity")
w ith a n assu med we ight of 150 l bs (68 kg) fo r each passen ger at a
designated seating position and the total weight of any luggage in
the v ehicle. I f you tow a trailer, the we ig ht o f the tra ile r hi tch and t he
tongue weight of the loaded trailer must be includ ed as part of the
ve hicle l oad.
The
Gross Axle Weight Rating ("GAWR"l is t he maximum load that
can be applied at each of the vehicle's two ax le s.
The Gross Ve hicle We ig ht Rat ing and t he G ross A xle Weig ht Rat ing
are listed on the safety comp liance stic ker label located either on
t he d rive r's side 8 -p illar or on th e inside of the fuel fil ler fla p. You r
Audi has 5 seating positions, 2 in the front and 3 in the rear for total
seating ca paci ty of 5 . Each seating p ositi on has a safe ty be lt
=> page 202, "Safety belts" .
The fact that there is an upper limit to your veh icle's Gross Vehicle
W eight Rating m eans tha t the to tal weight o f whateve r is bein g
carried in the vehicle (including the weight of a trailer hitch and the
to ngue we igh t of the l oad ed trai ler) is li mit ed . The m ore passe ng ers
in the vehicle or passengers who are heavie r than the standard
we ig ht s assum ed mean that les s we ight ca n be ca rri ed as luggage.
The tire pressure labe l on your Audi also lists the maximum
com bined we ig ht of a ll of t he occ upa nts and luggage or other ca rg o
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Vehicle care I t •

--~_T_ ir_e_ s_ a_ n_d _ w_ h_ e_e _l_s _________________________________________________ _
Tire pressure
Incorrect tire pressure causes premature wear and can cause
sudden tire blow-out. For this reason, tire pressure must be checked
at least once a month~
page 319.
Driving style
Driving fast around curves, heavy acceleration and hard braking
increase tire wear.
Rotating tires for more even wear
For all four tires on your vehicle to have the same service life, we
recommend that the front and rear tires are rotated according to the
tire manufacturer's suggested tire rotation intervals. Please remember the following:
• Tire rotation intervals may differ from the vehicle service inter­
vals outlined in your Maintenance and Warranty Booklet.
• The longer one tire is used in one location on the vehicle, the
more it wears at certain points; therefore, we recommend that you
follow the tire manufacturer's suggested tire rotation intervals.
• Vehicles with front-wheel drive experience more tread wear on
the front wheels compared to all-wheel drive (quattro®l .
• Please rotate tires as shown ~
page 323, fig. 243.
• Extra care must be taken when rotating direction -specific tires
~ page 344.
Wheel balancing
The wheels on new vehicles are balanced. However, various situa­
tions during everyday driving can cause them to become unbal ­
anced, resulting in vibrations you can usually feel through the
steering wheel.
Unbalanced wheels must be rebalanced to avoid excessive wear on
steering, suspension and tires. A wheel must also be rebalanced
when a new tire is installed.
Incorrect wheel alignment
Incorrect wheel alignment can cause excessive tire wear, impairing
the safety of the vehicle. If tires show excessive wear, have the
wheel alignment checked by an authorized Audi dealer or qualified
workshop.
All Wheel Drive
Vehicles with quattro® must always have tires of the same size, construction and tread type. For details see~
page 264.
& WARNING
Sudden tire failure can lead to loss of control, a crash and serious
personal injury!
• Never drive a vehicle when the tread on any tire is worn down
to the wear indicators.
• 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 away 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 speeds.
• 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. •

Tires and wheels -________________ w-.
•
Remove wheel center covers and trim discs before putting snow
chains on you r veh icle =>
(D. For sa fety reasons c ove r cap s m ust
then be fitted over the wheel bo lts . These are avai lable from autho ­
r ized Aud i deale rs.
& WARNING
Using the wrong snow chains for your vehicle or in stalling them
incorrectly can increase the risk of loss of control leading to
serious personal injury.
• Snow ch ains are available in different sizes . Always make sure
to follow the instructions provided by the snow chain manufac ­
turer .
• When driving with snow chains never drive faster than the
speed permitted for your specific snow chains .
• Always observe local regulations .
0 Note
• Remove sn ow chai ns b efore d rivin g on roads not cove red w ith
snow to avoid damaging tires and wearing the snow chains down
u n n ecessa r i ly.
• Snow chains , which come into d irect contact with t he whee l rim,
ca n scratc h or da mage it. T herefore, ma ke sur e tha t th e snow chains
are suitably covered.
• I f the Adaptive Air Suspensio n* shou ld malfunction, do no t
mount or use snow chains because the vehicle will be extremely
l o w. I f yo u do drive w ith snow c hai ns o n w hi le t he ve hicle is a t thi s
level, the snow cha ins might severe ly damage the wheelhouse and
ot her parts o f the vehicle.
[ i ] Tips
W her e sn ow c hai ns are manda tory on certa in roa ds, t his no rm ally
a lso app lies to vehic les with Al l Wheel Drive. •
Wheel bolts
Wheel bo lts must alw ays be t ig hte ned to the correct
to rq ue .
The design of wheel bo lts is matched to the factory instal led rims. If
d iffere nt rim s are fitted, the corr ect w heel bo lts w it h t he rig ht le ngth
and correctly shaped bolt heads must be used. This ensures that
w he els are fitted securely and that the brake sys tem func tions
correctly.
I n certa in c ircums ta nces, you may not use wheel bo lts from
a
different vehicle -even if it is the same model=> page 368.
& 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 bolts is 9 0 ft lb (120 Nm) with a
to lera nce of± 7,4 ft lb(± 10 Nm). Torque whee l b o lt s d ia go nally.
Af ter changing a wheel, the torque must be checked as soon as .,_
Vehicle care I t •

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Fuses and bulbs
Fuses
Replacing a fuse
A problem in the electrical system may be caused by a
blown fuse.
Fig . 256 Ins trumen t
pa nel left: Face c over
F ig . 257 I nst rume nt
pa nel left: Co ntent
F ac e cover
- Locate the fuse which belongs to the component which
failed.
- Switch off the ignition and the e lectr ica l component
affected. - Carefully p
ry t he face cover off the instr umen t pane l
using the ignition key or a screwdriver~ fig. 256.
- Rem ove the plastic clip @ from i ts retainer in the face
cove r~ fig. 257, p lace i t over the questionable fuse and
remove the fuse.
- Replace a blown fuse (recognizable by the melted metal
str ip inside) wi th a f use of the
same amperage.
The individual circuits are protected by fuses. T he fuse panels with
the fuses are located on the left and right front faces of the instru­
ment pane l behind a cover and in the right storage area in the
luggage compartment.
There is a plastic clip @ in the cover on the lef t side of the instru ­
ment pane l, which can be used to remove the fuses . The crank © is
used for emergency operation of the power roof*. You will also find
a label on both covers in the instrument panel with the fuse layout
© for the corresponding fuse panel.
& WARNING
Nev er r eplac e a fuse with one that ha s a high er amperag e rati ng.
• A fu se w ith a to o high ampe rage co uld d amag e the ele ctr ical
pa rt a nd cau se a fire .
0 Note
• On no account should fuses be repaired (e .g. patched up wi th tin
foil or wire) as this may cause serious damage elsewhere in the e lec­
trica l circuit o r cause fire.
• If a fuse blows repeatedly, do not keep replacing it. Instead , have
the cause of the repea ted short circuit or overload located and fixed.
ti>
Vehicle care Do-it-yourself service Technical data