2014 AUDI S8 radiator cap

16 Instruments and warning/indicator lights
automatically if the driver's safety be lt is fas­
tened .
Ill Parking brake!
If the II indicator light turns on and this
message appears, there is a parking brake
malfunction. Drive to your authorized Aud i
dealer or qualified wo rkshop immediately to
have the ma lf u nction corrected .
-l Engine cooling system malfunction
A malfunction in the engine cooling system
must be repaired as soon as possible.
• Switch off engine and check coolant level
If the indicator light turns on and the mes­
sage appears, the coolant temperature is too
high or the coolant level is too low.
• Pull off the road.
• Stop the vehicle.
•Turnoff the engine.
• Check coolant level ¢
page 240.
• Add coolant if necessary ¢ page 240.
• Continue driving only after the eng ine cool­
ant warning/ indicator light goes o ut.
• Contact your authorized Audi deale r for as-
sistance if necessary .
If 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 m inutes to cool down.
A WARNING
-If your vehicle 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
wa rning lights ¢
page 47, 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 coolant 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 warn ing stickers ¢
page 231.
([) Note
Do not continue dr iv ing if the . symbol
ill uminates. There is a malfunction in the
engine cooling system -you could damage
your engine .
~ Safety belts
This warning/indicator light reminds you to
put on your safety belt.
The . warning/ indicator light illum inates
when the ignition is switched on to remind
the driver and any front passenger to put on
the safety belt. Add itionally, an acoustic warn­
ing (gong) w ill also sound .
For more Informat ion
¢ page 145, 4'-Safety
belt warning light .
· u Battery
This warning/indicator light detects a mal­
function in the generator or in the vehicle's
electrical system .
The. warn ing/ indicator light illuminates
when you switch on the ignition and must go
out after the eng ine 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 immediate ly. Because the vehi­
cle battery is discharging, turn off all unnec ­
essary electrical equipment such as the radio . .,.

24 0 Ch eck ing and filling
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance .
Fig . 204 Eng ine compartment: cover on the coolant
expa nsion tank
Before you check anything in the engine com­
partment,
a lwa ys re ad and h eed a ll WA RN­
INGS o .A in Working in the engine compart­
ment on page 231 .
Park your vehicle on a level surface.
• Switch
off the ignition .
• Read the engine coolant leve l from the cool­
ant expansion tank
o fig. 204, o page 233.
With a cold engine, the coolant level should
be betwee n the "min" and "max" markings.
When the engine is warm, the level may be slightly above the "max" marking .
The location of the coolant expans ion tank
can be seen in the engine compartment illus ­
tration
o page 233.
To obtain an accurate reading, the engine
must be switched
off.
The expansion tank in your vehicle is equipped
with an e lectric coolant level sensor.
When the coolant level is too low, the warning
light in the Auto-Check System
o page 16 wi ll
illuminate unti 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 level
from time to time.
Coolant l oss
Coolant loss may indicate a le ak in the cooling
system. In the event of coolant loss, the cool- ing system shou
ld be inspected immediately
by your authorized Audi dea ler . It is not
enough mere ly to add coo lant .
In a
sea le d system, losses can occur on ly if
the boiling point of the coo lant is exceeded as
a res ult of overheating.
A WARNING
-The cooling system is under pressure and
can get very hot. Red uce the risk of scald­
i ng from hot coolant by fo llow ing these
steps.
- Turn
off the engine and allow it to cool
down.
- Protect your face, hands and arms from
escaping flu id and steam by covering the
cap with a large, th ick rag.
- Turn the cap slowly and very carefully in
a counter-clockwise d irect ion while ap­
plying light, downward pressure on the
top of the cap.
- To avo id being burned, do not sp ill anti­
freeze or coolant on the exhaust system
or hot engine parts. Under certa in cond i­
tions, the ethylene glycol in engine cool­
ant can catch fire.
0 Note
Do not add any type of radiator leak seal­
ant to your veh icle's engine coolant . Add­
i ng radiator repa ir fluid may adverse ly af­
fect the funct io n 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 anyth ing in the eng ine com­
partment,
alw ay s re ad and h eed all WARN­
IN GS o .A in Working in the engine compart­
ment on page 231.
• Tu rnoff the engi ne.
• Let the eng ine cool down.

~ Place a thick rag over the coolant expansion
tank
¢ page 240, fig . 204 and car efull y
twist the cap counter-clockwise ¢ ,A.
~ Add coolant mixed in the correct ratio
¢ page 239, Coolant.
~ Tw ist the cap on again tightly .
Replacement engine coolant must conform to
exact specifications ¢
page 239, Coolant .
We recommend using on ly coolant additive
G12 ++, G 13 or in an emergency G12 +. Do
not
use a different additive. In an emergency use
pla in water until you can get the correct addi­
tive and can restore the correct ratio. This
should be done as soon as possible .
If you have lost a considerable amount of
coolant, then you should add co ld antifree ze
and cold water only when the eng ine is co ld.
A lways use
new engine coolant when ref illing.
D o not fill coolan t above the "M AX " mar k. Ex­
cess coolan t will be forced ou t th rough the
p ress ure re li ef va lve in the cap when the en ­
gine becomes hot .
&_ WARNING
- The coo ling system is under press ure and
can get very hot. Reduce the risk of
sca ld ing from hot coolant by f ollowing
these steps .
-Tu rn off the engine and a llow i tto cool
down.
- P rotec t your f ace, hands an d ar ms from
escaping f lu id and ste am by cover ing
the cap with a large, thick rag.
- Tu rn the ca p slowly and very ca re fully
in a counte r-clockwise d irect ion while
app ly ing light, downwa rd p ress ure on
the top of the cap.
- To avo id being burned, do not sp ill an­
tifreeze or coolant on the exhaust sys ­
tem or hot engine parts . Under certa in
conditions, the ethylene glyco l in en­
g ine coolant can catc h fire.
- Antifreeze is poisonous. Always store an­
t ifreeze in its or iginal container and well
o ut of the reac h of children .
Checkin g and fillin g 241
-If you dra in the coo lant, it m ust be
caught and safely stored in a pr oper con ­
tainer clearly marked "poison".
([) Note
-Coo lant poll utes the environment and
co uld cause an engine fi re . Excess cool ­
ant will be forced out th ro ugh the pres­
sure relief valve in the cap when the en­
gine becomes hot .
- If, in an eme rgency, only wate r can be
added, the correct ratio between water
and antifreeze ¢
page 239 must be re­
stored as soon as poss ible .
@) For the sake of the environment
Drained coola nt should not be reused. A l­
ways d ispose of used coolant while observ­
i ng all env iro nmental regula tions .
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 acco rding to the temperature of the
coolant .
An auxiliary electric radiator fan* sw itches on
and off depending on coolant temperature
and othe r vehicle operat ing cond it io ns.
After you switch the engine off, the aux iliary
fan can continue running for up to 10 m inutes
- even w ith the ignition off . It can even switch
o n aga in later by itself¢
A, if
- the temperature of the engine coo lant rises
due to the heat build- up from the engine in
the engi ne compa rtment, or
- the engine compa rtment heats up because
the vehicle is parked in intense sunlig ht.
&_ WARNING
- To reduce the risk of perso nal inj ury nev-
er touch the radiator fan .
II>-
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Power windows ..... .... ... .. .. .. .... 41
malfunct ion . ... .. .... ... .. .. .. .... 42
P regnant wome n
Specia l cons iderations when weari ng a
safety belt . .. ........... .. .. .. ... 1 50
pre sense . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Preventative passenger protection . . . . . 197
Pr og ramming t he Homelink universa l re-
mote cont ro l .............. .... .. .. . 133
Prope r occupa nt seating posit ions .... . 136
P roper safety belt position . . . . . . . . . . . . 149
Pr ope r seat ing pos ition
Fr ont passenge r .......... .. .. .. ... 137
Occupa nts .. ............. .. .. .. .. . 136
Rear passengers . . . . . . . . . . . . . . . . . . . 138
Protect ing . ............ ...... .... .. 218
Q
quattro
refer to All Wheel Drive .. ..... .... .. 204
Question What happens to unbe lted occupants? 146
Why safety be lt s ? ........ .. .. ... .. 145
R
Radiator fan ... .... .... ... .. .. .. ... 241
Radio cloc k .. ............. .... .. .... 27
Ra in/light sensor
H eadlights ........... ...... .... ... 46
Intermittent (windshield wipe rs) . . . . . . 53
Sensor defective . . . . . . . . . . . . . . . . . . . . 2 2
Range (fuel level) .......... .. .. .. .. .. 25
Reading lights .. .. .. .... ... .. .. .... .. 50
Rear fog lights . ................. ... . 46
Rear lid Escape hand le
Rear light 269
D efect ive . . . . . . . . . . . . . . . . . . . . . . . . . 22
Rear seats Ad justing individua l seats .. .. .. .. .. .. 6 1
E ntry ass istance . . . . . . . . . . . . . . . . . . . . 64
Fr ont passenger seat adju stmen t .. .. .. 64
Reclining rear seat ..... ... .. .. .. .. .. 63
Rear view mir ro r . . . . . . . . . . . . . . . . . . . . . 56
Rear window heating ....... .. .. .. .. .. 81
Inde x 305
Recirc ulation mode (a utomat ic cl imate
control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Reclining rear seat . ................. . 63
Ref uel ling .. .. .. .. ................. 225
Remote contro l
Garage door opener (Homelink) . ... .. 133
Massage function . . . . . . . . . . . . . . . . . . . 64
Un locking and locking . ............. . 35
Remote luggage compartmen t lid re lease 37
Repair ma nuals .. .. .. ............... 292
Repairs Airbag system ... .. .. .. .... ... .. .. 166
Re placi ng
F uses ... .. .. .. .. .. . .............. 278
Light bu lbs .. .... .. . .. .. ..... ... .. 282
Tires and wheels ... . .. ..... ... .. .. 260
Windshie ld wiper blades ..... ... .. .. . 54
Repo rting Safe ty Defe cts ......... .. .. 143
Reset button .. .. .. ............... .. . 27
Retractor . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Rims Cleaning .. .. .. .. ................. 217
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Load ing ... .. .... .. . .. .. ..... ... .. . 73
Roof weight ... .... . ... ...... ... .. . 73
s
SA FE .... .. .. .. .... .. .. ...... ... .. . 27
Safe driving habits . .. ... ....... .... . 135
Safety be lt pos ition . . . . . . . . . . . . . . . . . 149
Safety be lts worn by pregnant women . 150
Safety be lt pretensioner . . . . . . . . . . . . . . 151
Se rvice and disposa l .... ...... ... .. 152
Safety be lt pretensioners
P re sense . .. .. .. ... ............ .. 19 7
Safety be lts . . . . . . . . . . . . . . . . . . . . . . . . 148
Adjust ing ... .. .. .. . .. .... .... .. .. 150
Cleaning ........ .. ..... .......... 218
Danger to passengers who do not wear a
safety be lt . . . . . . . . . . . . . . . . . . . . . . . 146
F asten ing . .. .. .. .. ............... 148
Improperly worn ... . .. ... .... ... .. 151
Not worn . . . . . . . . . . . . . . . . . . . . . . . . 146
Safety be lt pos ition . . . . . . . . . . . . . . . . 149
Safety instr uctions ................. 148
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