2009 AUDI S6 check engine light

lffl __ C _h_ e_ c_k _in --== g'-- a_n _d_ f_il _li _n ..:::g:::..- ___________________________________________ _
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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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.•

ll'IJ Alphabetical index
---=------------------------------------------------
Warning/indicator lights . .... . ... .. 22
Worn brake pads symbol . . . . . . . . . . . 35
B reak -in period . . . . . . . . . . . . . . . . . . . . . 271
Brake pads .. ...... .... ... ...... . 272
Tires .. .... ... .... .... ... .... ... 271
Bu lbs ..... ..... .... .... .... ....... 355
Bumper
cover
Caution when parking near a parking bar- rier or curb ...... ... .... .... ... 122
C
Ca lifornia Proposition 65 Warning ... .. 302
Battery specific . . . . . . . . . . . . . . . . . . 314
Capacities ....... ... .... .... ....... 369
Car care ....... ...... .... ... .... ... 282
Interior ......................... 289
Plastic and vinyl ...... ...... . .. .. 286
Weathers trips ...... ... .. ...... .. 287
Care of exterior .... ...... ... .... .... 282
Cargo area
See Loading the luggage compartment ..
201
Cargo net ..... ... .... .... ..... ...... 90
Catalytic converter . . . . . . . . . . . . . . . . . . 272
CD changer . . . . . . . . . . . . . . . . . . . . . . . . . 99
Centra l locking
Emergency locking .. ...... .. . .... . 50
Certification . . . . . . . . . . . . . . . . . . . . . . . 375
Changing a flat tire ...... .... .... ... 344
Changing a wheel . ... .... .... ....... 344
Changing engine oi l .. .... .... ...... . 306 Chassis
Undercoa ting . .... .... ...... ..... 288
See also Adaptive A ir Suspension .. . 184
CHECK button . . . . . . . . . . . . . . . . . . . . . . . 15
Check ing
Engine coolant level . ...... ....... 308
Checking tire pressure ....... ........ 323
Child restraints
Danger of using child restraints in the
front seat .... .... .... .... .... .. 217
What types of chi ld restraint anchors are
available? .... .... .... .... .... .. 251
Where can I get add itional informat ion
about chi ld restraints? ... .. .. .... 252
Child safety ...... ..... .. .... .. . 238, 243
Additional information . ........... 257
Booster seats . ... ... ....... ...... 246
Convertible chi ld safety seats .... .. 244
Convertible locking retractor . ...... 248
Guidance fixtures for lower anchorages
254
Important safety instructions for using chi ld safety seats .. . ......... ... 241
Important things to know when driving
with children ....... .... ... .. ... 238
Infant seats ... ... .... .... .... ... 243
Installing a child restraint using the
LATCH system . . . . . . . . . . . . . . . . . . 256
Lower anchorages ........ ... .... . 253
Mounting and releasing the anchorage hook .. ...... ........ .......... 257
Older children and safety belts ... .. 247
Saf ety bel ts and ol dler children ... .. 247
Teth er anchors .... .... ....... ... 257 Tether
strap ... .... .... ....... .. . 258
Which restraint sys tem should my older
chi ld wear? .......... .. .. .... .. 247
Child safety lock
rear doors (power) . .... .... .... ... . 51
Child safety seats .... .... .... .... ... 243
Conver tible locking re tractor .... ... 248
Danger of using child restraints in the
front seat ..................... . 217
How do I properly install a child safety
sea t in my vehicle? ...... ....... . 241
Installing .. .. .. .... ... .. .. .... ... 248
LATCH system . .... .... ... .... ... 256
Safety instructions .... .... .... ... 241
Cigarette lighter ........... .... ...... 97
Cleaning Alcantara (synthetic suede) .... ... . 292
Engine compartm ent ... ... .... ... 293
Fabrics and fabric cov erings ... .... 289
Ins trumen t panel .... ... ..... ... .. 290
Inte rio r ...... ....... ....... .. .. . 289
Leather ............. ....... .. ... 291
MMI display .. .. .. .... .... ...... . 289
MM I terminal . .... .... ... ... .. ... 289
Plastic and viny l ... .... .... .... ... 286
P lastic parts .... .. .... .... ....... 290
Safety belts . . . . . . . . . . . . . . . . . . . . . 293
Trim strips .. ...... .... ....... .. . 285
trim strips ...... ....... ...... .... 286
Cleaning and protection .......... ... 282
Climate control .. ... ...... ...... .... 102
Synchroni zing . .... ... ... ........ 104
Warm and cold ... .... ...... ... .. 102

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Doors
Power child safety lock .... .... .... . 51
Power side door closer . . . . . . . . . . . . . 48
Driver information system .... .... .... . 23
Digital speedometer .. ............ . 25
Driver information messages .. .... . 28
Open door or rear lid warning ... .... 25
Outside temperature disp lay .. . .... . 24
Sound system display . .... ...... .. 24
Driver seat
See Seating position . . . . . . . . . . . . . . 196
Driver's seat . . . . . . . . . . . . . . . . . . . . . . . . 81
Driver's seat memory . . . . . . . . . . . . . . . . . 84
Activating remote control key .. ... .. 85
Recalling a seat position .. .... .... . 84
Storing a seat position ..... ... .... . 84
Driving messages .... .... .... ... .... . 28
Driving safely .. .............. ...... 194
Driving time ........ .... ... ........ .. 38
Duplicate key ........................ 41
DVD player for navigation system . . . . . . 91
Dynamic shift program ... .... ... .... 165
E
Easy entry feature 116
Electric seat adjustment
See Power seat . . . . . . . . . . . . . . . . . . . 81
Electromechanica l parking brake
Emergency braking .... ....... .... 123
Malfunction ...... .... .... ...... . 123
Operation . . . . . . . . . . . . . . . . . . . . . . . 121
Parking . . . . . . . . . . . . . . . . . . . . . . . . . 122 Releasing and app
lying ... .. .. .... 121
Starting off with a trailer .. ........ 123
Warning/indicator lights ... .... .... 21
Electronic differential lock (EDU How the system works . .... ....... 263
Warning/indicator lights ....... .... 21
Electronic immobilizer .......... ... 14, 44
Electronic power control (EPC) warning/indicator light ... .... . 18
Electronic speed limiter ..... ....... ... 27
Electronic stabi lization program (ESP)
How the system works ............ 262
Warning/indicator lights ....... .... 18
Emergency braking . . . . . . . . . . . . . . . . . 123
Emergency closing Power sunroof . ... ..... ... .... . 60, 61
Emergency flasher . . . . . . . . . . . . . . . . . . . 67
Warning/indicator lights ........... 19
Emergency locking of doors .. ........ . 50
Emergency starting ........ .... ... .. 357
Emergency towing ... .... .... .... ... 360
Energy management . ....... ... .. ... 269
Battery power . . . . . . . . . . . . . . . . . . . 270
Driver notification 270
Engine Compartment . .... .... .... .... .. 302
Coolant ....... .... ... .... ....... 307
Hood ..... .... .... .... ........ .. 300
Starting .. .... ... .... .... ... 116,117
Starting with jumper cables ... .... 357
Stopping .. .... .... .... .... ...... 118 Engine compartment
Safety instructions . ....... .... ... 301
Working the engine compartment .. 301
Engine coolant system .. ...... ....... 307
Adding coolant .... ....... ....... 309
Checking coo lant level . .... .... ... 308
Checking the engine coo lant level .. 308
Malfunction .. .. .. .. .. .... .... .. . . 31
Radiator fan . .... .... .... .... .... 310
Engine coolant temperature
Temperature gauge ....... .... .... 12
Engine data ...... .... .... ...... .... 369
Engine hood Closing .... .. ... ..... ....... .... 301
How to release the hood . . . . . . . . . . 300
Engine oi l .......................... 303
Adding ... .... .... .... .... ...... 306
Additives .. .... .... .... ... .... ... 306
Changing .. .... .... ... ........ .. 306
Checking the engine oil level ....... 305
Indications and conditions requiring extra
checking .. ...... .... ...... .... 305
Oil consumption . ...... .... .... .. 304
Oil grades .. .... .... ... .... ...... 303
Recommended oil check intervals .. 305
Specification and viscosity .. ..... .. 303
Engine oi l leve l ... .... .... .... ...... . 35
Engine oil pressure
Malfunction ....... ....... ........ 32
Engine oil sensor defective .... .... ... . 35
Engine speed limitation ... .... .... .... 36