2009 AUDI S6 light

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models; 60% for Canadian models). This mixture both assures the
necessary frost protection and protects metal components in the
engine's cooling system from corrosion and scaling. It also raises
the boiling point of the coolant.
Do not reduce the concentration of the coolant in the summer by
adding plain water.
Th e pro port io n of coo la nt additi ve mu st be at
lea st 50 % but n ot mor e th an 60 %
to maintai n ant ifreeze protection
and cooling efficiency. If the coolant frost protection is too low , the
coolant could free ze and damage the veh icle heating and engine
cooling system .
For year-round driving , antifreeze is added at the factory for temper ­
atures down to:
• -31 °F ( -35 °c1 usA
• - 40 °F ( - 40 °C) Canada.
You can mix the
Gl 2+ + coolant additive with other additives (G12+
or G12). Always check w ith your authorized Audi dealer.
& WARNING
B efo re you che ck anyt hing in th e eng ine compartmen t, alway s
re ad a nd he ed all WARN ING S~
& in " Working in the engine
c ompar tm ent " on
page 30 1.
0 Not e
• Before winter sets in, have the coolant checked to see if the
coo lant additive in your vehicle is sufficient to meet the climate
conditions. This is especia lly important if you live in a region where
the winter is extremely cold . If necessary, increase the proportion of
coolant additive to 60%.
• When adding coolan t additive to your coo ling system,
remember:
-We recommend using only coolant additive
G12+ + (check the
label) for your vehicle. This coolant additive is avai lable at autho­
riz ed Audi dealers. Other types of antifreeze can significantly reduce corrosion protection. The resulting corrosion can cause a
loss of coolant and serious engine damage.
• Do not add any type of radiator leak sealant to your vehicle's
engine coolan t. Adding radiator repair fluid may adversely affect the
function and performance of your cooling system and could result
in damage not covered by your New Vehicle Limited Warranty. •
Checking the engine coolant level
The engine coolant level can be checked with a quick
glance.
F ig . 2 42 E ngin e
com partm ent : Cool ant
ex pans io n tank
Before you check anything in the engine compartment,
alw ays read and h eed all WARNINGS ~ & in "Working in
the eng ine compartment" on page 301.
- Turn off the ignition.
- Read the e ngine coo lant level from the coo lant expan -
sion tank~ fig. 242. With a cold engi ne, the coolant level
sho uld be between the "min" and "max" markings. W hen
the engine is warm, the level may be slightly above the
"max" marking .
The location of the coolant expansion tank can be seen in the
engine compartment illustration~
page 302.

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•
T o obtain an accurate reading, the engine must be switched off .
The expansion tank in your vehic le is equipped with an e lectric
coolant level sensor.
When the coolant level is too low, the warning light in the Auto ­
Check System ~
page 37 will blink until you add coo lant and the
level has been restored to normal. Even though there is an electric
coolant level sensor, we still recommend you check the coo lant level
from time to time .
Coolant loss
Coolant loss may indicate a leak in the cooling system. In the event
of coolant loss, the cooling system should be inspected immedi­
ately by your authorized Audi dealer . It is not enough merely to add
coo la nt.
In a sealed system, losses can occur only if the boiling point of the
coolant is exceeded as a result of overheating .
0 Note
Do not add any type of radiator leak sealant to your vehicle's engine
coolant . Adding radiator repair fluid may adversely affect the func­
tion and performance of your cooling system and could result in
damage not covered by your New Vehicle Limited Warranty. •
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 301.
- Turn off the engine.
- Let the engine cool down. Place
a thick rag over the coolant expansion tank
~ page 308, fig. 242 and carefully twist the cap counter­
clockwise ~& .
Add coolant.
- Twist the cap on again
tightly .
Replacement engine coolant must conform to exact specifications
~ page 307, "Coolant". Even in an emergency, if coolant additive
G12++ , G12 + or G12 is not availab le, do not use a different additive .
Use plain water instead until you can get the correct add itive and
can restore the correct ratio. This shou ld be done as soon as
possible.
If you have lost a considerab le amount of coolant, then you should
add cold antifreeze and cold water only when the engine is cold .
A lw ays use
new engine coolant when refilling.
Do not fill coolant above the "MAX" mark. Excess coolant will be
forced out through the pressure relief valve in the cap when the
eng ine becomes hot.
& WARNING
• The cooling system is under pressure and can get very hot.
Reduce the risk of scalding from hot coolant by following these
steps.
-Turn off the engine and allow it to cool down .
- Protect your face , hands and arms from escaping fluid and
steam by covering the cap with a large , thick rag.
- Turn the cap slowly and very carefully in a counter-clockwise
direction while applying light , downward pressure on the top
of the cap.
- To avoid being burned, do not spill antifreeze or coolant on
the exhaust system or hot engine parts. Under certain condi-
tions , the ethylene glycol in engine coolant can catch fire . ...
Vehicle care
I t •

Checkin g and fillin g Ill
--------------~-
•
-Read the brake fluid level from the brake fluid reservoir
~ fig. 243. The brake fluid level must be between the
"MIN" and "MAX" markings.
The brake fluid reservoir is located at the rear partition of the engine
compartment on the left side=> page 302.
The fluid level may drop slightly after some time due to the auto ­
matic adjustment of the brake pads . This is not cause for alarm.
If the brake fluid level falls considerably below the "MIN" mark, the
brake warning/indicator l ight (U.S. models:
BRAKE , Canadian models:
CCD> l will come on=> page 22 and=> page 30. Do not continue to
operate the vehicle . The complete brake syste m shou ld be thor ­
oughly checked by an authorized Audi dealer or other qualified
facility and the cause corrected. If the brake fluid level is too low, the
brake warning/indicator light will illuminate . Contact an authorized
Audi dea ler
immedi ately. •
Changing brake fluid
Have the brake fluid changed by an experienced techni ­
cian.
Brake fluid absorbs moisture from the air. If the water content in the
brake fluid is too high, corrosion in the brake system may result
after a period of time . The boiling po int of the brake fluid will also
decrease considerably and decrease braking performance.
T herefore, the brake fluid must be changed
ever y two yea rs. Always
use new brake fluid which conforms to Federa l Motor Veh ic le Stan­
dard "FMVSS 116 DO T 4".
The brake fluid reservoir can be difficult to reach, therefore, we recommend that you have the brake fluid changed by your autho­
rized
Audi deal er. Your dealer has the co rrect tools, the right brake
fluid and the know-how to do this for you.
& WARNING
• Bra ke fluid i s poi sonou s. It m ust be stor ed only in the closed
or iginal container out of the reach of children!
• Brake f ailur e can result fr om old or in approp riat e bra ke fluid .
Ob serve the se pre cauti ons:
- Use o nly br ake fluid that me ets SAE specifi cation
J 1703 and
c onfo rm s t o Fed eral Mo to r V ehicle Standard 116 . Alway s check
w ith your auth oriz ed A udi de aler t o m ake sure you are usin g
the correct b rake flu id . The corre ct ty p e of brake flu id i s al so
indi cate d on the br ake fl uid r eservo ir .
- The brake f luid mu st be new . Heav y use of the brake s can
ca us e a va por lo ck if the brake fluid is left in the sy stem too
long. Thi s ca n seriou sly affect th e effic iency of the brake s as
well as your safe ty. T his co uld r esult i n an a ccide nt.
0 No te
Brake fluid wil l damage the paint of your vehicle .
'£> For the sake of the environm ent
Because of the problem 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 authorized Audi
dea ler. •
Battery
General information
Under norm al 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 ._
Vehicle care I t •

-Checking
and filling
---=---------------
checked by a service facility . The electrolyte level should also be
checked each time the battery is charged
~ page 314.
Have the battery checked when you take your vehicle in for service.
You are well advised to replace a battery that is older than 5 years.
With certain types of airbag deployment, the battery is discon­ nected from the vehicle electrical system for safety reasons~
& in
"Repair, care and disposal of the airbags" on
page 229.
Disconnecting the battery terminals
Some vehicle functions (power window regulators, for example) are
lost if the battery terminals are disconnected . These functions have
to be relearned after the battery terminals are connected again . To
prevent this, the battery should only be disconnected from the
vehicle electrical system when absolutely necessary for repairs.
Vehicles not driven for long periods
If you do not drive your vehicle over a period of several days or
weeks, electrical components are gradually cut back or switched off.
This reduces energy consumption and maintains starting capability
over a longer period
~ page 269.
Take into consideration that when you unlock your vehicle, some
convenience functions , such as the master key remote function or
power seat adjustment, may not be available. The convenience
functions will be available again when you turn on the ignition and
start the engine.
Winter operation
During the winter months, battery capacity tends to decrease as
temperatures drop . This is because more power is also consumed
while starting, and the headlights, rear window defogger, etc., are
used more often.
Avoid unnecessary power consumption, particularly in city traffic or
when traveling only short distances. Let your authorized Audi dealer
check the capacity of the vehicle battery before winter sets in
~ page 314. A well charged battery will not only prevent starting
problems when the weather is cold , but will also last longer .
[ i] Tips
If your vehicle is left standing for several weeks at extremely low
temperatures, the vehicle battery should be removed and stored
where it will not freeze. This will prevent it from being damaged and
having to be replaced. •
Working on the battery
Be especially careful when working on or near the battery.
Fig. 244 Luggage
compartment : Battery
The battery is located in the luggage compartment under
the floor. Before you check anything in the luggage
compartment,
read and heed all WARNINGS=>& .
Lift the floor by the plastic handle.
Hook the handle into the luggage compartment weather
strip.
Always heed the safety warnings, when working on the vehicle
battery or the vehicle electrical system to prevent injury.

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•
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 contains sulfuric acid. Always wear
gloves and eye protection.
No
- sparks
- flames
- smoking.
When a battery is charged, it produces 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 is the risk of injury, accident and even fire. Read and heed the
following WARNINGS:
• Always wear eye protection. Do not let battery acid or any lead
particles get on your skin or clothing. Shield your eyes. Explosive
gases can cause blindness or other injury.
• Battery acid contains sulfuric acid. Sulfuric acid can cause
blindness and severe burns.
- Always wear gloves and eye protection. Do not tilt the
battery because acid could leak out of the ventilation openings.
- If you get battery acid in your eyes or on your skin, immedi­
ately rinse with cold water for several minutes and get medical
attention.
& WARNING (continued)
-If you should ingest any battery acid, seek medical attention
immediately.
• Do not expose the battery to an open flame, electric 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
terminals with tools or other metal objects. This would cause the battery to heat up very quickly, which could lead to damage or
explosion and personal injury.
• When a battery is charged, it produces hydrogen gas which is
explosive and could cause personal injury.
• Always keep the battery well out of the reach of children.
• Before work is done on the electrical system, disconnect the
negative ground cable.
• Before performing any work on the electrical system, switch off
the engine and ignition as well as any electrical equipment. The
negative cable on the battery must be disconnected.
If you are just
going to replace a light bulb, then it is enough to switch off the
lights.
• Before disconnecting the battery, switch off the anti-theft
alarm system! Otherwise you will set off the alarm.
• When disconnecting the battery, first disconnect the negative
cable and then the positive cable.
• Before reconnecting the battery, make sure all electrical
consumers are switched off. Reconnect the positive cable first and
then the negative cable . Never interchange the cables - this could
start a fire!
• Never charge a frozen or a thawed-out battery. It could
explode! If a battery has frozen, then it must be replaced. A
discharged battery can freeze over at 32 °F (0 °CI. .,,_
Vehicle care
I t •

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0 Note
Make sure the ventilation hose on the side of the battery is
connected, otherwise fumes or battery acid can leak out.
Because of the problem of proper disposal of a battery, we recom ­
mend your authorized Audi dea ler change the battery for you.
Batteries contain sulfuric acid and lead and must always be
disposed of properly in compliance with all environmental regula ­
tions . Disposing of vehicle batteries improperly is very dangerous to
t he environment. •
Windshield/headlight washer
container
Fig . 246 Engine
compartment: Wind ­
s hie ld and headlight*
washer fluid container
The washer fluid container is marked with the symbol O 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
301 .
-Lift the fille r cap tongue to add washer fluid. You can fill
the container to the top.
- Press the cap back onto the filler neck after filling the
container.
You can find the reservoir capacity in the table in=> page 369.
To prevent lime residue from building up on the spray jets, use
distilled water when refilling. Always add a gla ss cleaner solution
(with frost protection in the winter).
0 Note
Do not mix engine coolant antifreeze or any other additives to fill up
the windshield washer reservoir.•

-Tires and wheels
PW-------------------
If you wish to improve comfo rt when operating the vehicle at
normal load (up to 3 occupants) , you can adjust tire pressures to
those spec ified for normal vehi cle load . Before operating the vehi cle
at maximum load, you must in crease the tire pressures to those
specified for ma ximum vehi cle load =>
&.
Bear in mind that the tire pressure monitoring system can on ly
m onito r the t ire pressures you have stored. The syste m does not
recognize the load condition of your vehic le .
The effect iveness of the tir e pr essure moni toring syste m will be
impaired if you store normal load pressures but then operate the
veh ic le a t its ma ximum load=>& . See the
illustrat ion=>
page 321, fig. 247 for the location of the label
on driver's sid e 8-pi llar (c olor of the actual label and exac t loca tion
on the veh ic le wi ll vary slight ly) .
N ote that the fol lowing tab le is accurate at the time of going to
press and is subject to cha nge . In the eve nt of d iscrepa nc ies, t he tire
pressure label is located on the driver's side 8 -pi llar always takes
p recedence .
T he tab le below lists the recommended cold tire inflation pressures
fo r th e A udi m odel co ve red by you r Owner 's Litera ture at the
vehic le's capacity weight and the tire sizes installed on the respec ­
t ive mode ls as o rigi nal equipment, o r as a fac to ry o ption.
Engine Tire designation Tire pressure front Tire pressure rear
(displace- normal load normal load
ment in condition (up to full load
condition (up full load
liter ) condition
condition
3 occupants) to 3 occupants)
PSI kPA
PSI kPA
PSI kPA PSI
kPA
6-cylinder
245/45 R17 99H XL All Season 35 240 38 260 32 220 39 270
3 .0
245/40 R18 97H XL All Season 38 41 280 35 240 290
245 /40 R18 97V XL High Performance
35 240
35 260 32 220 38 2 60
255 /35 R19 96V XL High Performance 39 270 44 300 33 230 45 3 10
6 -cylinder 245 /45 R17 99H XL All Season 33 230 36 250 3 0 210 36 250
3 .2
245/40 R18 97H XL All Season
36 250 39 270 33 230 39 270
245 /40 R18 97V XL High Performance 33 230 36 250 3 0 21 0 36 250
255 /35 R19 96V XL High Performance 39 270 44 300 33 230 45 310
8 -cylinder 245 /45 R17 99H XL All Season
36 250 39 270
33 230 39 270
4 .2
245/40 R18 97H XL All Season 39 270 42 290 35 2 40 42 2 90
245 /40 R18 97V XL High Performance 36 250 39 270 33 230 39 270
255 /35 R19 96V XL High Performan ce
39 270
44 300 33 230 45 310
XL= reinforce d or ex tra load tire . It may als o ap pear as xi, EXTRA LOAD, or RF o n the tire s ide wall.

--~_T_ ir_e_ s_ a_ n_d _ w_ h_ e_e _l_s _________________________________________________ _
The tire pressure label on your Audi lists the recommended cold tire
in flatio n press ures f or the new, original equipment tires that were
on your vehic le at the time it was manufactured. For the location of
the label =>
page 321, fig. 247.
Most tires lose air natural ly over time. They can a lso lose some air if
you drive over a pothole or hit a curb while parking. It is usually not
possible to see whether the radial t ires used today are underinflated
just by looking at them.
Therefore, be sure to check tire pressures at least once a month and always before going on a long trip. Make sure to take the number of
people and the amount of luggage into account when adjusting tire
pressure for a trip - even one that you would not consider to be
"long." See =>
page 325, "Tires and vehicle load limits" for more
important information .
Always use an accurate tire pressure gauge when checking and adjusting inflation pressures. Check a ll of the tires and be sure not
to forget the spare tire . If the pressure in any tire is too high when
the tire is "cold," let air out of the tire s lowly with the edge of the tire
gauge and keep checking the pressure until you reach the pressure
that is correct for the load (passengers and luggage) and kind of
driving you p lan to do.
If the pressure in any tire is too low, note the difference between the
press ure in the cold t ire and the pressure you need and add the air
that you need to reach the correct pressure for the vehicle load
(passengers and luggage) for the tires on your vehicle as listed on
the on your vehicle and in this manual and the kind of driving you p lan to do .
Nev er e xce ed the m aximum i nflation pr essure listed on the tir e
s ide wall for any rea so n .
Remember that the veh ic le manufacturer, not the tire manufacturer,
determines the correct tire pressure for the tires on your vehicle .
It is important to check the tire pressure when the tires are cold.
• Read the required tire pressure from the tire pressure label. The
tire pressure label is located on the driver's side B -pillar. • T
urn the valve stem cap counter -clockwise to remove it from the
t ire valve .
• Place the air pressure gauge on the valve.
• T he tire pressures should only be checked and adjus ted when
the tires are cold. The s lightly raised pressures of warm tires must
not be reduced.
• Adjust the tire pressure to the load you are carrying.
• Reinstall the valve stem cap on the valve .
When should I check the tir e pre ssure?
The correct tire pressure is especially important at high speeds . T he
p ressure should therefore be checked at least once a month and
always before starting a journey. Do not forget to check the tire pres ­
sure for the spare whee l =>
page 343.
Wh en shoul d I adj us t th e tir e pre ssu res?
Adjust the tire pressure to the load you are ca rrying . Af ter changing
a wheel
o r replacing wheels you have to adjust the tire pressures on
a ll whee ls . In add ition, you must then store the new tire pressures
in the tire pressure monitoring system=>
page 338 .
& WARNING
Incor re ct t ire pre ssure s and /or und erinf latio n can le ad sudden t ire
failure , los s of control , collision , seriou s per son al injury or even
death .
• When the warning symbol
t appe ars in the in strumen t
c luste r, sto p a nd in spe ct the tire s.
• Incor rect tire pre ssure and /or underi nflati on can cause
i ncrea sed tire wear and can affe ct the h andl ing of the veh icle an d
s topping abil ity .
• Incorre ct t ire pres sur es a nd/or und erinflat ion c an a lso lead to
s udden tir e failure , including a blowout and sudden deflat ion ,
ca usin g lo ss of vehicle control . .,_