2008 AUDI S8 heating

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&, WARNING (continued)
• When removing the oil drain plug with your fingers, stay as far
away as possible. Always keep your forearm parallel to the ground
to help prevent hot oil from running down your arm.
• Drain the oil into a container designed for this purpose, one
large enough to hold at least the total amount of oil in your engine.
• Engine oil is poisonous. Keep it well out of the reach of children.
• Continuous contact with used engine oil is harmful to your
skin. Always protect your skin by washing oil off thoroughly with
soap and water.
0 Note
Never mix oil additives with your engine oil. These additives can
damage your engine and adversely affect your Audi Lim ited New
Vehicle Warranty.
<£> For the sake of the environment
• Before changing your oil, first make sure you know where you
can properly dispose of the used 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 facility 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 in the winter.
The cooling system is sealed and generally requires little attention.
The cooling system has been filled at the factory with a permanent
coolant which does not need to be changed . The coolant consists of
a mixture of water and the manufacturer's glycol -basedcoolant
additive G12 ++ antifreeze with anti corrosion addi tives (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 coolant in the summer by
adding plain water.
The proportion of coolant additive must be at
least 50% but not more than 60%
to maintain antifree ze protection
and cooling efficiency. If the coolant frost protection is too low, the
coolant could freeze and damage the vehicle heating and engine
cooling system.
For year-round driving, antifreeze is added at the factory for temper­
atures down to :
• -31 °F ( -35 °C) USA
•
-40 °F ( -40 °C) Canada .
You can mix the G12 ++ coolant additive with other additives (G12 +
or G12). Always check with your authori zed Audi dealer .
& WARNING
Before you check anything in the engine compartment, always
read and heed all WARNINGS
~ & in "Working in the engine
compartment" on
page 307.

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0 Note
• Before winter sets in, have the coolant checked to see if the
coolant additive in your vehicle is sufficient to meet the climate
conditions. This is especially 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 coolant additive to your cooling system,
remember:
-We recommend using only coolant additive G12+ + (check the
label) for your vehicle. This coolant additive is available at autho­
rized 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 coolant. 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.
Fig . 267 Engine
compartment : Coolant
expansion tank
Before you check anything in the engine compartment,
always read and heed all WARNINGS => & in "Working in
the engine compartment" on
page 307.
Turn off the ignition.
Read the engine coolant level from the coolant expan­
sion
tank => fig. 267 . With a cold engine, the coolant level
should be between the "min" and "max" markings. When
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 308.
To obtain an accurate reading, the engine must be switched off.
The expansion tank in your vehicle is equipped with an electric
coolant level sensor.
When the coolant level is too low, the warning light in the Auto­
Check
System => page 31 will blink until you add coolant and the
level has been restored to normal. Even though there is an electric
coolant level sensor, we still recommend you check the coolant 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
coolant .
In a
sealed system, losses can occur only if the boiling point of the
coolant is exceeded as a result of overheating.
& WARNING
The cooling system is under pressure and can get very hot. Reduce
the risk of scalding from hot coolant by following these steps.
.,_
Vehic le care I I Technical data

-Alphabetical index _-!.. ____ ...::.:..:... ___________________________ _
Power seat . . . . . . . . . . . . . . . . . . . . . . . 87
Safety guidelines .. ....... .... .... 86
Seat belts Why YOU MUST wear them .. ...... 209
Seat memory . . . . . . . . . . . . . . . . . . . . . . . . 94
Seat position Incorrect seat position . . . . . . . . . . . . 203
Seating capacity .................... 209
Seating position Driver .......................... 200
Front passenger . . . . . . . . . . . . . . . . . 201
How to adjust the front seats . . . . . . 201
Occupants . ...... .... .... ...... . 200
Rear passengers
Seats 202
Number of seats ... ....... ....... 209
Selective unlock feature . . . . . . . . . . . . . . 52
Selector lever . . . . . . . . . . . . . . . . . . . . . . 164
Service and disposal Safety belt pretensioner . . . . . . . . . . . 217
Service interval display ............... 27
Service position Windshield wipers ................ 82
Servotronic Power steering . . . . . . . . . . . . . . . . . . 273
Shift buttons . .... .... .... ........ .. 168
Ship Transporting your vehicle
Side airbags 369
Description ... .... .... .......... 237
How they work . . . . . . . . . . . . . . . . . . . 238 Side assist
Activating and deactivating ........ 154
Description .......... ...... .... .. 154
Informationa l and alert stage signa ls 156
Messages in instrument cluster display ..
161
MM I settings .................... 159
Operation . . . . . . . . . . . . . . . . . . . . . . . 156
Safety tips . . . . . . . . . . . . . . . . . . . . . . 161
Sensor detection area . . . . . . . . . . . . 155
Side curtain airbags Description .......... ...... .... .. 240
How they work ................... 241
Safety instructions ............... 241
Side curtain airbags (SIDEGUARD) ..... 240
Side marker lights . . . . . . . . . . . . . . . . . . . 69
Ski sack . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Snow chains ... .. ...... ....... ..... 342
Sockets ....................... 107, 108
So lar blower fan/solar roof . . . . . . . . . . . 123
Sound system display Driver information display . .... .... . 25
Spare wheel ... ....... .... .... ...... 350
Speed contro l system
See Adaptive Cruise Control .. ..... 139
Speed rating letter code ............. 338
Speed warning system ......... ...... 36
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . 14
Sport Suspension
See Adaptive Air Suspension .... ... 185
Starting off with a trailer .... .... .... . 136 Starting the engine
...... .... .... 129, 130
What should I do if the engine does not
start? ..... ...... .... ...... ... . 130
Steering .. .... ... .... .... ..... .. ... 128
Adjusting steer ing column ...... ... 128
Easy entry feature ... .. .... .... ... 129
Locking the steering ... .... .... ... 129
Malfunction .. .. .. .... .... .... .... 33
Steering wheel heating .............. 119
Steps for determining correct load limit 334
Stopping the engine .. ....... .. .... .. 131
Storage .. .... ........... .... ...... 109
Compartments in the door trim pane ls ..
111
Compartments in the rear doors .. .. 111
Cupholder ... .. .... .... ...... .... 105
Cupholder rear center armrest ..... 105
Glove compartment ....... .... ... 109
Luggage compartment .. .... ... ... 112
Ski sack . . . . . . . . . . . . . . . . . . . . . . . . . 102
Small objects .......... .... .... .. 110
Sun shade ..... ...... .... ...... ..... 78
Sun visors .... ........... .... .... ... 77
Switches Emergency flashers ...... .... .... .. 73
Power sunroof .................... 65
Rear window defogger ..... .... ... 124
Symbols Red .......... ............... .... 30
Y ellow ........................... 34

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Rain sensor ........ .... .... .... ... 80
Service position . ....... .... .... ... 82
Washer reservoir ...... .. .... .... . 323
Winter driving Windows . .... .... .... ... .... .... 292
Winter operation Battery . ... .. .... .... .... .. . .. .. . 318
Cooling system ...... .... .... ... . 314
Steering wheel heating .. .... . .... . 1 19
Tires .. ......... .... .... ... .... . 273
W. t t
' in er ires . .. .. .... .... ... .... ... .
Al l-whee l drive . ...... .... ... .... .
Wiper blades 341
341
See Windshield wipers ............. 82
X
Xenon-Lights ...... .... .... ......... 362
y
Yellow symbols ... .... .... .... .... ... 34
Controls and equip­
ment Safety first Vehicle operation
Vehicle care Do-it-yourself service Technical data