2011 AUDI S8 radiator cap

16 Instruments and warning/indicator lights
• Continue driving only after the engine cool­
ant warning/indicator light goes out.
• Contact your authorized Audi dea ler for as-
sistance if necessary .
I f the engine coolant level is correct, then the
radiator fan may be the cause of the malfunc­
tion .
• Coolant temperature too high! Please let
engine run with vehicle stationary
If the indicator light turns on and the mes­
sage appears in trailer mode*, let the engine
run at id le for a few minutes to cool down.
A WARNING
-If your veh icle should break down for
mechanical or other reasons, park at a
safe distance from moving traffic, turn
off the engine and turn on the hazard
warning lights
c> page 44, Emergency
flasher .
-
-Never open the hood if you see or hear
steam or coolant escap ing from the en­
gine compartment - you risk being scald­
ed . Wait until you can no longer see or
hear steam or coo lant escaping.
- The engine compartment of any vehicle
is a dangerous area. Before you perform
any work in the engine compartment,
turn of the engine and allow it to cool.
Follow the warning stickers
<=>page 216,
Engine comportment .
(D Note
Do not continu e driving if the . symbol
illuminates. There is a malfunction in the
engine cooling system -you could damage
your engine.
,f,. Safety belts
This warning/indicator light reminds you to
put on your safety belt.
The . warn ing/ indicato r light illum inates
when the ignition is sw itched on to remind
the driver and any front passenger to put on the safety be
lt. Additionally, an acoustic warn­
ing (gong) wi ll also sound.
For more Information
q page 137, ,f,. Safety
belt warning light .
0 Battery
This warning/indicator Light detects a mal­
function in the generator or in the vehicle's
electrical system.
T he . warn ing/indicator light i llum inates
whe n you switch on the ignition and must go
out after the engine has started .
• Alternator fault: Battery is not being
charged
If the indicator light turns on and the mes­
sage appears, there is a malfunct ion in the
generator or veh icle electrical system.
Drive to your authorized Audi dealer or quali­
fied workshop immed iately. Because the veh i­
cle battery is discharg ing, turn off all unnec­
essary electrical equipment such as the rad io .
Seek professiona l assistance if the battery
charge level is too low.
(•i low battery charge: battery will be
charged while driving
If the indicator light turns on and the mes­
sage appears, there may be limited starting
ability .
If this message turns off after a little while,
the battery charged enough while driving.
If the message does not turn off, have your
authorized Aud i dea ler or qualified workshop
correct the malfunction.
~ Engine oil pressure malfunction
The red engine oil pressure warning symbol
requires immediate service or repair. Driving with a low-oil-pressure indication is likely to
inflict severe damage to the engine .
• Switch off engine and check oil level
If the indicator light turns on the message ap-
pears, the oil pressure is too low.
IJI>

222 Checking and filling
Checking and filling Engine hood
Releasing the engine hood
The engine hood is released from inside the
vehicle .
Fig. 175 Driver foo twell: release lever
AUD I
Fig. 176 Rocker switch un der the hood
Make sure the wiper arms are not raised up
from the windshield. Otherwise the paint
could be damaged.
.,. Pull the lever under the instrument panel in
the direction of the arrow
¢ fig. 175.
.,. Raise the hood slightly¢,&. .
... Press the rocker switch under the hood up­
ward ~
fig. 176. This releases the catch.
... Open the hood.
&_ WARNING
Hot engine coolant can burn you.
- To reduce the risk of being burned, never
open the hood if you see or hear steam
or coolant escaping from the engine compartment . Wait until no steam or
coolant can be seen or heard before care­
fully opening the hood .
' 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 per­
sonal injury always observe the following
WARNINGS. The engine compartment of any
vehicle is a hazardous area
¢ ,&. .
/n.. WARNING
To help avoid injury, before you check any­
thing under the hood:
- Turn off the engine.
- Switch off the ignition .
- Apply the parking brake.
- 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
compartment. Wait until no steam or
coolant can be seen or heard before care­
fully opening the hood.
- Keep children away from the engine com­
partment.
- Never spill fluids on hot engine compo­
nents . They can cause a fire .
- Never touch the radiator fan. The auxili­
ary electric fan is temperature controlled
and can switch on suddenly .
- Never open the coolant reservoir cap
when the engine is still warm . The cool­
ant system is pressurized and hot cool­
ant 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 electri­
cal system is necessary:
- Always disconnect the battery.

230 Check ing and filling
th e "min" and "max" markings. When the
engine is wa rm, the level may be slightly
above the "max" marking.
The location of the coolant expansion tank
can be seen in the engine compartment ill us­
tration ¢
page 224 .
To obtain an accurate read ing , the engine
must be switched
off .
The expans io n tank in you r vehicle is equipped
with an e lectric coolant level se nsor.
When the coolant level is too low, the warning light in the A uto-Check System ¢
page 15 will
i llum inate u nti l 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 leve l
from time to time.
Coolant loss
Coolant loss may indicate a leak in the cooling
system. In the event of coolan t loss, the cool­
ing system should be inspected immedia tely
by your authorized Audi dealer. It is not
enough mere ly to add coolant.
I n a
se aled system, losses can occur only if
the boiling point of the coolant is exceeded as
a result of overheat ing.
A WARNING
T he cooling system is unde r pressure and
can get ve ry hot . Reduce the risk of sca ld­
ing from hot coolant by following these
steps.
- Turn off the engine and allow it to cool
down.
- Protect yo ur face, hands and arms from
escaping fluid and steam by cove ring the
cap with a large, thick rag.
- Turn the cap slowly and very carefu lly in
a counter-clockwise direction wh ile ap­
plying light, downward pressure on the
top of the cap .
- To avoid being b urned, do not spill ant i­
freeze or coolant on the exhaust system or hot eng ine parts . Under ce rtai n condi -
'
tions, the ethylene glycol in engine coo l­
ant can catch fire.
@ Note
Do not add any type o f radiato r leak sea l­
ant to your vehicle's engine coolant. Add ­
i ng radiator repa ir fluid may adverse ly af­
fect the funct ion and performance of your
cooling system and could result in damage not covered by your New Veh icle L imited
Warranty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anyth ing in the engine com­
partment,
always read and heed all WARN­
INGS
c> .&. in Working in the engine compart­
ment on page
222 .
• Turnoff the engine .
• Let the eng ine cool down.
• Place a thick rag over the coolant expansion
tank
c> page 22 9, fig . 180 and carefully
tw ist t he cap co unter-clockwise c> ,& .
• Add coo lant .
• Twist the cap o n again
tightly.
Replacement engine coo lant must conform to
exact spec ificat ions ¢
page 229, Coolant .
Even in a n emerge ncy, if coo la nt addi-
t ive G 12++ , G12+ or G12 is not ava ilable , do
not use a d iffe ren t addit ive. Use plain water
instead unt il you can get the cor rect add itive
and can restore the correct ratio . This sho uld
be don e as soon as possible.
If you have los t a consider able amount o f
coolant, then you sho uld add cold ant ifreeze
and cold wate r on ly when the engine is cold.
Always use
new engine coo lant when refilling.
Do not f ill coolant above the "MAX" mark. Ex ­
cess coola nt w ill be fo rced o ut through the
pressure relief valve in t he cap when the e n-
gine becomes ho t.
Ill>

A WARNING
-=
-The cooling system is under pressure and
can get very hot . Reduce the risk of
scald ing from hot coolant by following
these steps .
- Turn
off the engine and a llow 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 spi ll an­
tifreeze or coolant on the exhaust sys­
tem or hot engine parts. Under certa in
conditions, the ethylene glycol in en­
g ine coolant can catch fire.
- Antifreeze is poisonous. Always store an­
t ifreeze in its original container and well
out of the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a proper con­
tainer clearly marked "poison".
(D Note
- Coolant pollutes the env ironment and
could cause an engine fire. Excess cool­
ant w ill be forced out through the pres­
sure relief valve in the cap when the en­
gine becomes hot.
- If, in an emergency, only water can be
added, the correct ratio between water
and antifreeze
Q page 229 must be re­
stored as soon as possible.
@ For the sake of the environment
Drained coolant should not be reused. Al­
ways dispose of used coolant while obse rv­
ing all environmental regulations.
Checkin g and fillin g
Radiator fan
The radiator fan switches on automatically by
itself .
The rad iator fan is dr iven by the engine via the
V-belt. The viscous clutch regulates the speed
of the fan according to the temperature of the
coolant .
An auxiliary electric radiator fan* switches on
and
off depending on coolant temperature
and other vehicle operat ing cond it ions .
After you switch the engine
off, the aux iliary
fan can continue running for up to 10 minutes - even with the ignition
off. It can even switch
on again later by itself
Q &., if
- the temperature of the engine coo lant rises
due to the heat build-up from the engine in
the engine compartment, or
- the engine compartment heats up because the vehicle is parked in intense sunlight.
A WARNING
- To reduce the risk of personal in jury nev­
er touch the radiator fan .
- The auxiliary electric fan is temperature
controlled and can switch on suddenly
even when the engine is not running.
- The auxiliary radiator fan sw itches on au­
tomatically when the engine coolant reaches a certa in temperature and w ill
continue to ru n until the coolant temper­
ature drops.
231
•
•

294 Index
Panoramic sunroof ........... .. .... .. 41
Sun shade . . . . . . . . . . . . . . . . . . . . . . . . . 42
Parking . .. .... ........... ........ .. 82
Valet park ing ............ .. .. .. .. .. 40
Park ing brake ... . ...... ... .. .. .. .. .. 81
also refer to Electromechanical park ing
brake .. .. .. ................ ... ... . 81
Parking lights ............. .... .... .. 43
Parking system
C leaning camera lens ............... 208
Parking system advanced
Adjust ing the display .......... .. .. . 122
Adjust ing the warning tones .. .. .. ... 122
Rear view camera -parking mode 1 .. . 121
Rear view camera -parking mode 2 . .. 121
Safety precautions ................ . 118
Switching on and off ....... .... ... . 120
Parts replacement ......... .... .... . 285
Pass-through with ski sack . . . . . . . . . . . . . 66
PASSENGER AIR BAG OFF light .... ... . 1S6
Passenger protection ........ ..... .. . 188
Passive safety system ......... .. .... . 127
Pedals .. .. .. ............. .. .. .. .. . 132
Physical principles of a frontal collision . 138
Polishing .... ................ ..... . 209
Pollutant filter (automatic A/C system) . . 7 4
Power locking system . . . . . . . . . . . . . . . . . 31
Locking/unlocking the vehicle from in-
side . .. .. .. ................ ... ... . 34
Rear lid .. .. ... .... ...... .. .. .. .. .. 35
Selective unlock feature . .. .. .. .. .. . . 32
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Unlock ing and locking vehicle ... .. .. . . 32
Power seat adjustment Front seats . . . . . . . . . . . . . . . . . . . . . . . . S5
Rear seats .. ................ ... ... . S7
Power steering (servotronic) . .. .. .. .. . 194
Power windows . . . . . . . . . . . . . . . . . . . . . . 39
malfunction . . . . . . . . . . . . . . . . . . . . . . . 39
Pregnant women
Special considerations when wearing a
safety belt . . . . . . . . . . . . . . . . . . . . . . . 142
pre sense .. .. ... .. ..... ... .... .. .. . 188
Preventative passenger protection . . . . . 188
Programming the Homelink ® universal re-
mote control .............. .. .. .. .. . 124 Proper
occupant seating positions ... .. 128
Proper safety belt position ............ 141
Proper seating position Front passenger .. ............. .... 129
Occupants . .. .. .. .. .. ... ..... ... .. 128
Rear passengers .. ..... ........... . 130
Q
quattro ®
refer to All Wheel Drive . . . . . . . . . . . . . 194
Question What happens to unbelted occupants? 138
Why safety belts? ............. .... 137
R
Radiator fan ...... ................ . 231
Radio clock ... .. .. ............. .. .. . 26
Rain/light senso r
Headlights .. ...... ... ..... ... .. .. . 43
Intermittent (w indshield wipers) ...... 48
Sensor defective . . . . . . . . . . . . . . . . . . . . 21
Range (fuel level) . . . . . . . . . . . . . . . . . . . . 24
Reading lights ... .. ............. .. .. . 46
Rear fog lights .. .. ....... ...... .. .. . 43
Rear lid Automatic operation .............. .. 36
Emergency release ............... .. . 37
Escape handle . .. ............. .... 259
Opening and closing ..... ...... .. .. . 35
Rear light Defective . . . . . . . . . . . . . . . . . . . . . . . . . 21
Rear seats Adjusting individual seats ....... .... . 57
Entry assistance . . . . . . . . . . . . . . . . . . . . 60
Front passenger seat adjustment . . . . . . 60
Reclining rear seat ................ .. 59
Rear view camera
Reverse Parking .. ............. .. .. 121
Rear view mirror ... ....... ...... .. .. . 51
Rear window heating ................. 76
Recirculation mode (automat ic climate
control) .... .... ................... . 7S
Reclining rear seat . ... .. ....... ... .. . 59
Refrigerator
refer to Cooler . . . . . . . . . . . . . . . . . . . . 216
Refuelling .... .. .. .. ... ............ 220