2008 AUDI S6 coolant temperature

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•
Closing the engine hood
- Pull the hood down until the pressure from the struts is
reduced .
- Let the hood
drop down and latch in place. Do not try to
push it shut;
it may fail to engage => &.
& WARNING
A hood that is not completely latched could fly up and block your
view while driving.
• When you close the engine hood, check it to make sure the
safety catch has properly engaged. The hood should be flush with
the surrounding vehicle body parts.
• If you notice while driving that the hood is not secured prop­
erly, stop at once and close it. •
Working in the engine compartment
Be especially careful whenever you work in the engine
compartment.
Whenever you must perform any work in the engine compartment,
for example checking and filling different fluids, there is a risk of injury, burns and accidents. To prevent personal injury always
observe the following WARNINGS. The engine compartment of any
vehicle is a hazardous area
~ & .
& WARNING
To help avoid injury, before you check anything under the hood :
• Turn off the engine.
• Remove the ignition key.
• Apply the parking brake .
& WARNING (continued)
• Move selector lever to "P" (Park).
• Always let the engine cool down. Hot components will burn
skin on contact.
• To reduce the risk of being burned, never open the hood if you
see or hear steam or coolant escaping from the engine compart­
ment. Wait until no steam or coolant can be seen or heard before
carefully opening the hood.
• Keep children away from the engine compartment .
• Never spill fluids on hot engine components. They can cause a
fire.
• Never touch the radiator fan. The auxiliary electric fan is
temperature controlled and can switch on suddenly.
• Never open the coolant reservoir cap when the engine is still
warm . The coolant system is pressurized and hot coolant could
spray out.
• Protect your face, hands and arm from steam or hot engine
coolant by placing a thick rag over the cap when you open the
coolant reservoir.
• If work on the fuel system or the electrical system is necessary :
- Always disconnect the battery.
- Never smoke or work near heaters or open flames . Fluids in
the engine compartment could start a fire.
- Keep an approved fire extinguisher immediately available.
• To avoid electrical shock and personal injury while the engine
is running or being started, never touch:
- Ignition cables
- Other components of the high voltage electronic ignition system.
• If you must perform a check or repair with the engine running: -First, fully apply the parking brake, move selector lever to "P"
(Park). .,
Vehicle care
I t •

_____________________________________________ C_h_ e_ c_k _in ~ g_ a_n _d_ f_il _li _n ~g __ lllll
•
because the lubricating properties of oil diminish gradually during
normal vehicle use .
Under some circumstances the engine oil should be changed more
frequently . Change oil more often if you drive mostly short
distances, operate the vehicle in dusty areas or under predomi ­
nantly stop -and -go traffic conditions, or have your vehicle where
temperatures remain below freez ing for extended periods.
Detergent additives in the oi l will make fresh oil look dark after the
engine has been running for a short time. This is normal and is not
a reason to change the oi l more often than recommended .
Because of the problem of proper disposal, along with the specia l
tools and necessary expertise required, we strongly recommend
that you have your oi l changed by an authori zed
Audi dea ler or a
qual ified service stat ion.
If you choo se to cha nge yo ur oi l y ou rse lf, please no te the following
important information:
& WARNING
To reduce the risk of per sonal injury if you m ust change the engine
o il in you r veh ic le y our self :
• Wear eye protection.
• To reduce the ri sk of burn s from hot engine oil , let the engine
c ool down to the tou ch.
• When removing the oil drain plug with your fing ers , sta y as far
away as po ssi ble . Alw ay s k eep your f orearm par allel to the gr ound
to help pre vent hot oil from running down your arm .
• Drain t he oil int o a contain er de signed for thi s purpo se , one
large enough to hold at l ea st th e total amount of oil in your eng ine .
• Engine oil i s poi sono us. K eep it well out of the rea ch of ch ildr en .
• Continuou s contact with u sed engine oil i s harmful to your
sk in. Al wa ys prote ct you r ski n by washing oil off thoroughl y with
s oap and w ater.
0 Note
Never mix oil addi tives with your engine oil. These add itives can
damage your engine and adversely affect your Audi Limited New
Vehicle Warranty .
c£> For the sake of the environment
• Before changing your oi l, first make sure you know where you
can properly dispose of the us ed oil.
• Always dispose of used engine oil properly. Do not dump it on
garden soil , wooded areas, into open streams or down sewage
drains .
• Recycle used engine oil by taking it to a used engine oil collec ­
tion fac ility in your area , or contact a service station. •
Engine cooling system
Coolant
The engine coolant performs two functions: it keeps the
engine from overheating and it protects the engine from
freezing i n the winter.
The cooling system is sea led and generally requires little attention.
The coo ling system has been fi lled at the factory with a permanent
coolant which does not need to be changed . The coolant consists of
a mixture of water and the manufac turer's glycol-basedcoolant
additive G 12+ an tifreeze with anticorrosion additives (50% for USA
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 coo lant in the summer by
adding plain water.
The p ropo rt ion of co ola nt additiv e mu st be at .,_
Vehicle care
I t •

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0 Not e
• Coolant pollutes the environment and cou ld cause an engine
fire. Excess coolant will be forced out through the pressure relief
valve in the cap when the engine becomes hot.
• If, in an emergency, only water can be added, the correct ratio
between water and antifreeze ~
page 303 must be restored as soon
as possible .
ci> For the sake of the environment
Dra ined coolant should not be reused . Always dispose of used
coolant whi le observing all environmental regulations. •
Radiator fan
The radiator fan switches on automatically by itself.
The rad iator fan is driven by the eng ine v ia the V-be lt . The v iscous
clutch regulates the speed of the fan according to the tempera ture
of the coo lant .
An auxiliary electric radiator fan * swi tches on and off depending on
coo lant temperature and other vehicle operating conditions.
After you switch the engine off, the auxiliary fan can continue running for up to 10 minut es -even with th e igni tion o ff. It can even
switch o n again later by itself~ & , if
• the temperature of the engine coo lant rises due to the heat
bui ld -up from the engine in the engine compartment, o r
• the engine compartment heats up because the vehic le is parked
in intense sun light.
& WARNING
• To reduce the ri sk of per sonal injury never tou ch the radiator
f a n.
& W AR N ING (continu ed )
• The auxiliary e le ctri c fan i s temperature controlled and can
s w itch on suddenly even when the engine is not running .
• The auxiliary radiator fan swit ches on automatically when the
engine coolant reache s a ce rtain temperature and will con tinue to
run until the coolant t emperatur e drop s. •
Brake fluid
Checking brake fluid level
Th e brake fluid level c an be checked with a quick glance.
Fig . 23 6 En gin e
co mp art m ent : B ra ke
fl uid re servoir
Befo re yo u c heck anything in th e en gin e compar tme nt,
always read and heed all WARNINGS~ & in "Working in
the eng ine compartment" on
page 297 .
Rea d the brake fl uid level from the bra ke fluid reservoir
~ fig . 236. T he b rake fluid leve l must be betwee n the
" M IN " and "MAX" markings.
The brake fluid reservoir is located at the rear parti tion of the engine
compartment on the left side~
page 298. .,_

_______________________________________________ C _o_ n _ s_u _ m_ e_ r_l_n _f_o _ r_ m_ a_ t _i _o _ n __ PII
workshop personne l in order to assure proper performance, reli ­
abil ity and sa fe ty of the vehicle a nd i ts many sys te m s.
I mproper maintenance, adjustments and repairs can impair the
operation and reliabil ity of your vehicle and even void your vehicle
war ra nty. T here fore, proof o f serv ic ing in accorda nce with the main ­
tenance schedule may be a condition for uphold ing a possible
war ra nty claim made withi n th e warranty per iod .
Above all, operat ional safety can be adverse ly affected, creating
unnece ssary risks fo r you and you r passengers .
If in doubt about a ny servici ng, have it do ne by your authorized Aud i
dea ler or any other properly equipped and qua lified workshop. We
str ongly u rge you to give your auth orized Audi dealer the oppo rtu ­
nity to perform al l scheduled maintenance and necessary repairs.
You r deale r has the facil ities, origi nal par ts and trained special is ts
to keep your vehic le running proper ly.
Performing limited maintenance yourself
T he fo llow ing pages describe a limited numbe r of procedures which
can be perfo rme d on you r vehicle wi th ordi nary too ls, should the
need arise and trained personne l be unavailab le. Before performing
any of these proced ures, always thor oug hly read a ll of th e appli­
cable text and carefu lly fo llow the instructions given. Always rigor ­
ously observe the WARNINGS provided.
Before you check anything in the engine compartment , alway s read
and heed all WARNINGS:::>
& and:::> & in "Wo rking in the engine
compartment" on
page 297.
& WARNING
• Ser ious persona l injury may occur as a result of improperly
performed maintenance , adjustments or repairs.
• Always be e xtremely careful when working on the vehicle .
Always follow commonly accepted safety practices and general
c ommon sense . Never ri sk per sonal injury .
Controls and equip­ ment Safety first
Vehicle operation
& WARNING (continued )
• Do not attempt any of the maintenance , checks or repairs
described on the following pages if you are not fully familiar with
these or other pro cedures with respect to the vehicle , or are uncer­
tain how to proceed.
• Do not do any work without the proper tools and equipment.
Have the necessary work done by your autho rized Audi dealer or
another properly equipped and qualified workshop .
• The engine compartment of any motor vehicle is a potentially
hazardous area . Never reach into the area around or touch the
radiator fan . It i s temperature controlled and can switch on
suddenly - even when the engine is off and the ignition key has
been removed . The radiator fan switche s on automatically when
the coolant reaches a certain tempe rature and will continue to run
until the coolant temperature drops .
• Always remove the ignition key before anyone gets under the
vehicle.
• Always support your vehicle with safety stands if it is neces­
sary to work underneath the vehicle. The jack supplied with the
vehicle is not adequate for this purpose and could collapse
causing serious personal injury .
• If you must work underneath the vehicle with the wheels on
the ground, always make sure the vehicle is on level ground , that
the wheels are always securely blocked and that the engine
cannot be started .
• Always make sure the transmission selector lever (automatic
transmission) is in "P " (Park position) and the park br ake is firmly
appl ied .
ffi For the sake of the environment
• Changing the engine settings wi ll adverse ly affect emission
leve ls. T his is detrimenta l to the envi ro nmen t and i ncreas es fu el
consumption.
Vehicle care Do-it-yourself service Tec hn ica l da ta

Alphab eti ca l ind ex -
--------------------------'-----
Plastic parts
Safety belts 286
289
Trim strips .... ... ....... ..... .. . 281
trim strips .... ........... ........ 282
Cleaning and protection .. .... ... ..... 278
Climate control ... .... .... .... .... .. 110
Synchronizing .. .... .... .... ..... 112
Warm and cold ........ .... .... ... 110
Climate controls Air distribution ........... .... .... 116
Air outlets ..... .. .... .... ...... .. 118
Air outlets (rear) ...... ....... .... . 118
Air recirculation .... .... .... .... .. 117
AUTO (standard setting) . .... .... .. 113
Basic settings . . . . . . . . . . . . . . . . . . . . 119
Center air vent ...... .... ....... .. 121
Controls ............. .... ....... 112
Defrosting/defogging . .... ... .... . 116
Description ... ..... .. .... ...... .. 110
ECON operation . . . . . . . . . . . . . . . . . . 120
Fan . .......... ...... .... ...... .. 116
Heated seats, front .... ... .... .... 114
Key coded setting ................ 110
Recirculation mode (automatic) ... .. 120
Recommended settings . .... .... .. 110
Residual heat .. ...... .... ...... .. 113
Setting the temperature . .... .... .. 114
SETUP ......... .... ... .. .... 119, 120
Solar blower fan/solar roof .. ...... . 119
Solar operation ... ........... .... 121
Switching on and off .. .... ...... .. 113
Synchronization .. .... ........... . 120
Using climate control economically . 119
Clock ......... ........ .... ... .... ... 14
Controls and equip­
ment Safety first
Closing D
Power sun roof
. . . . . . . . . . . . . . . . . . . . 67
Coat hooks ... .... .... .... .... ... ... 109 Damping
Cold tire inflation pressure ....... .... 317
See Adaptive Air Suspension ...... . 182
Compass mirror .. ... ..... ... .... ... .. 85 Data ..
... .... .... .... ... .... .... ... 363
Consumer Information ......... .. 201, 365 Data recorder ..
...... .... ...... .... . 258
Contacting NH TSA .. .. .. ... ... .... .. 201 Date display
........... ........ ...... 14
Continuously Variable Transmission (CVT) Daytime
running lights ... .... .... .. 70, 71
See multitronic® .. .... .... .... ... 159 def
Convertible chi ld seats What does this mean when it appears in
How do I properly install a convertib le the trip odometer display? .
.... .... 15
child seat in my vehicle? ......... 240 Defective light bu
lb warning .... .... ... 27
Safety instructions ................ 240 Defrosting/defogging the windows .... 116
Convertible locking retractor Defrosting/defogging windows ..... ... 118
Activating .......... .... .... .... . 246
Determin ing correct load limit ........ . 322
Deactivating . .... .... ... ..... ... . 247
Digital clock ..... ..... ...... .... .... . 14
Using to secure a chi ld safety seat . 244,
246
Coolant system ..................... 303 Digital compass
... .. .... .... .... ..... 85
Digita l speedometer ........... ....... 27
Dimensions .... .... .... ........... . 362
Coo ling System
Expansion tank .. .... .... ... .. .... 304
Cornering light .... ... .... .... ... .. .. 73
Cruise control
Changing speed .................. 133
Presetting your speed ............. 133
Switching off .................... 133
Switching on .................... 132
Warning/indicator lights .. .... ...... 22
See also Adaptive Cruise Control . ... 135
Cruising range ......... ...... .... ... . 40
Cupholder . ... .. ...... ....... .... .. 103 Dipstick
Reading the dipstick properly .... .. 301
Distance control system
See Adaptive Cruise Control ........ 135
Doors Power child safety lock . ........ .... 59
Power side door closer ............. 56
Driver information system ...... .... . .. 25
Digita l speedometer . .. .. . ... .... .. 27
Driver information messages . .... ... 30
Open door or rear lid warning .... ... 27
Outside temperature display ...... .. 26
Sound system display .. .... .... .... 26
Vehicle operation Vehicle care Do-it-yourself service Technical data

llffl __ A_l.:,. p _h_ a_ b_e _t _ic _ a_l _in _ d_e _x ____________________________________________ _
Driver seat
See Seating position . . . . . . . . . . . . . . 194
Driver's seat . . . . . . . . . . . . . . . . . . . . . . . . 88
Driver's seat memory . . . . . . . . . . . . . . . . . 91
Activating remote control key .. ... .. 92
Recalling a seat posit ion ...... .... . 91
Storing a seat position . ........ .... 91
Driving messages ...... .... .... .... .. 30
Driving safely .... .... .... ...... .... 192
Driving time . ...... .. .... .... .... .... 40
Dup licate key ........... .... ... .... .. 48
DVD player for navigation system . . . . . . 99
Dynamic shift program .............. 163
E
Easy entry feature 124
Electric seat adjustment
S ee Power seat . . . . . . . . . . . . . . . . . . . 88
Electromechanica l parking brake
Emergency braking .. ...... ...... . 131
Malfunction ...... .... .... ....... 131
Operation . . . . . . . . . . . . . . . . . . . . . . . 129
Parking . . . . . . . . . . . . . . . . . . . . . . . . . 130
Rel easing and app lying .... ... .... 129
Starting off with a trailer ... ..... .. 131
Warning /indicator ligh ts ... .... .... 23
Electronic differential lock (EDU
How the system works . . . . . . . . . . . . 259
Warning /indicator lights ....... .... 22
Electronic immobilizer . ... .... .. . .. 15, 51
Electronic power contro l
(EPC) warning/indicator light ...... .. 19 Electronic stabili
zation program (ESP)
How the system works . ...... ..... 258
Wa rning/indicator lights ......... .. 19
Emergency braking . . . . . . . . . . . . . . . . . 131
Emergency closing Power sunroof ......... .... ... . 68, 69
Emergency flasher . . . . . . . . . . . . . . . . . . . 73
Wa rning/indicator lights ..... ...... 20
Emergency locking of doors ....... ... . 57
Emergency starting .. ... .... .... .... 351
Emergency towing ..... .... .... ... .. 354
Energy management ... .. .... .... ... 265
Battery power . . . . . . . . . . . . . . . . . . . 266
Driver notification 266
Engine Compartment . .... .... .... .... .. 298
Coolant ......................... 303
Hood ... .. .... .... .... .... .... .. 296
Starting ...... ........ .... .. 124, 125
Starting with jumper cables .. ..... 351
Stopping ........................ 126
Engine compartment Safety instructions .... ...... ..... 297
Working the engine compartment .. 297
Engine coolant system ........ .... ... 303
Adding coolan t ..... ........ .... . 305
Checking coo lant level .. ....... ... 304
Check ing the engine coolant level .. 304
Malfunction ......... .... .. .. .... . 33
Radiator fan ...... .. .. .... .... ... 306
Engine coolant temper .ature
Temperature gauge ...... ...... ... 13
Engine data .. ... ... .. .... .... ...... 363 Engine hood
Clos ing ... .... ... ... ... .. .... ... 297
How to release the hood . . . . . . . . . . 296
Engine oi l ..... ... .... .... .. .. ..... . 299
Adding ... .... .... .... .... ... ... 302
Additiv es .. ...... ..... .. .. .... ... 302
Changing . ....... .... ... .. ...... 302
Checking the engine oil level . .... .. 301
Indications and conditions requiring extra
checking .. ...... .... .......... 301
Oil consumption ... .... .... .... .. 300
Oil grades . ...... ... ... .... ..... . 299
Recommended oil che ck in tervals .. 301
Specif ication and viscosity .. .. .. ... 299
Engine oil leve l ... .... .... .. .. ..... .. 37
Engine oil pressure Malfunction .. .. .. .... .... .... .... 34
Eng ine oi l sensor defective .... .... .... 37
Environment Break -in period ........ ..... ..... 267
Catalytic converter .... .... ..... .. 268
Disposing of your vehicle battery .. . 311
Driving a t high speeds ............ 269
Driv ing to minimize pollution and noise .
269
Fuel .... .. .... .... .............. 293
Fuel economy ...... .... .. .. .... .. 269
Leaks under your vehicle ....... ... 297
Letting the vehicle stand and warm up ..
270
Proper disposal of drained brake fluid 307
P roper disposal o f drained engine
coo lant ..... .. .. .... .... ....... 305

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Proper disposal of drained engine oil 302
Recycling used engine oil ..... ..... 302
Un leaded fuel ..... ....... .... ... . 291
What should I do with an old battery?
311
EPC
See Electronic power control . .... ... 19
ESP
See Electronic stabilization program
(ESP) ..... ... .. .... .... ...... ... 19
Event Data Recorder (EDR) ... .... ..... 258
Expansion tank ...... ....... ........ 304
Exterior lighting in the mirror housing ... 73
Eyeglasses compartment ............. 108
F
Fan
Radiator .............. .......... 306
Fastening eyelets ...... .... .......... 97
Flat tire Changing ... ... ... .. .... ...... .. 338
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . 198
Fog lights .... .... .... ... .. .... .... .. 72
Fo lding master key with remote contro l . 48
Foot pedals ...... .. .... .... ..... ... 198
For the sake of the environment Gasoline fumes and the environment 293
Letting you r engine warm up ...... . 125
Reducing engine noise by early
upshifting .. ...... ..... .... ... .. 13
Refuel ing .... .... ....... .... .... 293
Controls and equip­
ment Safety first
Saving
fuel by early upshifting .... .. 13
Usingtherearwindowdefogger .. .. 117
Front airbags
Description ......... .... .... .... . 216
How they work .... ........ ....... 221
Front arm rest adjusting . ...... .... .... ... .... ... 96
Storage compartment ... .... ..... .. 96
Front ashtray .... .... .... ........ ... 104
Front fog lights ..... ........ .... .... . 72
Front seats .. ............ .... ....... . 87
Adjusting ... ....... .... .... .... . 195
Child restraints in the front seat ... . 214
Fronta l collisions and the laws of physics
203
Fuel Additives ... .. ...... .... ..... .... 291
Blended gasoline .... ....... .... .. 291
Consumption ....... .... .... .... .. 40
Fi ller neck ......... .. ... .... .... . 292
Fuel gauge ... .. .... .... ...... .... 15
Gasoline .. .... ... .... .... .... ... 291
Gasoline additives ................ 292
Low fuel level .............. .... 15, 36
Octane rating .................... 291
Recommendation ....... ... ... ... 291
Refuel ling .............. ...... ... 293
Reserve .......................... 15
Tank capacity .... .... ... .... .... . 363
Un locking the fue l f iller flap by hand 295
Fuse arrangement ............. ...... 345 G
Garage door opener (HomeLink®) . .... . 186
Gas discharge lamps . .... ........... . 349
Gauges Engine coolant temperature .. .. .. . .. 13
Fuel gauge ..... .... .. .. . ... ...... 15
Speedometer ... .... ... .. .... ..... 15
Tachometer . .... .... .... .... ...... 14
Trip odometer ... .. .... .... ... .. .. . 15
General illustration Instruments and controls ... .. .... .. 11
Generator Warning/indicator lights ............ 19
G lossary of tire and loading terminology .. .
314
G love compartment ......... .... .... 107
cd changer ... .... .... .... .... ... 107
Valet key function .... .... .... ... .. 51
G love compartment -emergency unlocking
108
Gross Vehicle Weight Rating (GVWR) ... 361
H
Head restraints ... .... ..... ... ... ... 197
Adjusting .. .... .... ... .... .... ... 197
Front seats ... .... .... ... .... ..... 93
Installation and removal ............ 94
Rear seats .... .... .... .... ..... 94, 95
Headlight washer reservoir .. .... .... . 312
Vehicle operation Vehicle care Do-it-yourself service Technical data