2016 AUDI S8 overheating

Instruments and indicator lights
§0 Adaptive Light
Applies to: vehicles with Adaptive Light
m;J Audi adaptive light : system fault
If the indicator light turns on and th is message
appears, there is a malfunction in the adaptive
light system . The head lights st ill function .
Go to an authorized dea lership to have the head­
lights or the control unit for the Adaptive Light
repaired .
~D Light /rain sensor
!;I Automatic headlights /automatic wipers:
s y stem fault
If the ind icator lig ht t urns on and th is message
appears, the light/ra in sensor is no t funct ioning
correct ly.
For safety reasons the low beams are turned on
permanently with the switch in
AUTO . However,
you can continue to turn the lights on and off us­
i n g the light swi tch. You can still con trol a ll func­
tions th at are in dependen t of t he rain senso r
through t he w indshie ld w iper lever.
Contact your author ized Audi dealer as soo n as
possible to have the prob le m corrected.
I-: Sport differential
1,11 Sport differential : sy stem fault
There is a malfunc tion wi th t he sport differential.
Drive to yo ur authori zed Aud i dea le r i mmediately
to have the malfunct ion corrected.
1,11 Sport differential: overheating
T he t ransm iss ion tempe rature h as increased s ig­
n ificant ly due to the spor ty driv in g manne r. Dr ive
in a less sporty ma nner un til the tem perature re ­
turns to the normal range and the indicator light
sw itches o f.
A WARNING
Contact your authorized Audi dealer or a
qualified workshop if the sport differentia l is
faulty or malfunctioning . The repair m ust be
22
performed by t rained personnel using the cor­
rect oil in order to ensure safety .
¢ Q Turn signals
The indicator light blinks when you use either
turn signal.
Wheneve r yo u use the left II or the r ight B
turn s ignal, the indicator light blinks . When you
u se the emergency flashers, both indicator lights
flash.
I f one of the turn sign al light bulb s bu rn o ut, the
turn s ignal will b link twice as fast as no rma l.
Caref ully drive to yo ur authorized Aud i dea le r im ­
med iate ly to have the malfunction corrected. The
i ndicato r light does not indicate a ma lfunction if
a turn signal on the trailer or on the vehicle fails i n trailer towing mode.
(D Tips
Fo r more informati on on the t urn signa ls, re­
fer to
¢ page 48.

© -12 volt socket c:> page 72
@ -Folding table c:> page 68
©-center armrest and storage compartments:
to open the deep compartment, press the rig ht
button and fold the center armrest upward . To
open the compartment fo r the massage funct ion
r emo te contro l*
c:> page 63 and for the tele ­
phone*, press the left button and fo ld the center
armrest upward .
115-volt socket
Applies to: vehicles with 115-volt socket
The 115-vo lt socket can only be used when the
engine is running
c:> & . When you push the con­
nector all the way into the socket, the ch ild safe­
ty mechan ism releases and current flows through
the socket .
Equ ipment th at can be conn ect ed
Electrical devices can be connected to the 1 15
volt socket in the vehicle. Power consumption at
the 115-volt socket must not exceed 150 watts
(300 watts peak) . Check the power consumpt ion
of the equipment on the model plate .
LED on the socke t
-The socket is ready for use when the LED is
green.
- If the LED blinks red, there is a malfunction .
The socket will switch off automatically due to overcurrent or overheating. The socket will
switch on again automatically after a cool­
down period . Any devices that are connected
and switched on will activate again automati­ ca lly
c:> ,& .
A WARNING
- T he so ckets and the electrical accesso ries
conne cted to them operate only when the
ignition is switched on . Incorrect usage can
lead to serious injuries or burns. To reduce
the risk of injuries, never leave children un­
attended in the vehicle w ith the vehicle key.
- Heavy eq uipment or plugs with integrated
power supply units can damage the socket
and lead to injuries.
-
Seat s and sto rage
-Store all connected equipment securely
while the veh icle is moving so that they can­
not be thrown through the vehicle in the
event of a braking maneuver or an accident.
- Never sp ill any liquids on the socket . If any
mo isture gets into the socket, make certain
that all the moisture has dried up before us ­
ing the socket again .
- Equipment that is connected to the vehicle
socket can heat up more than it does when
connected to the public grid .
- When us ing adapters and extens ion cords,
the child safety for the 115-volt socket is
disabled and the socket is live.
- Never insert anyth ing other than the plug of
an app ropr iate electrical accessory into the
soc ket, especially th ings that conduct ele c­
tr icity, e.g. metal pens, knitting need les,
etc. into the contacts of the 115 -vol t sock­
et .
- Turn the electrical equ ipment off if the
socket has switched off because of over­
heating.
(D Note
- Always follow the manufacture r's i nstruc­
tions for a ll electrical accessories yo u wan t
t o use with the e lectr ica l socket!
- Do not connect lamps tha t con tain a neon
t u be. Fo r tech nica l reasons the lamp may be
damaged.
- Do not connect any 230-volt equipment to
t he 115-vo lt socket . The equipment may be
damaged. If necessa ry , check the permiss i­
ble vo ltage for the equipment on the mode l
label.
- In the case of some power packs, e.g. for a
laptop computer , the bui lt-in ove rcurrent
shutoff prevents it from being switched on
because of excessive start-up current. In
this case, disconnect the power pack from the consumer and reconnect it after abo ut
1 0 seconds .
(D Tips
-Unshielded equ ipment may cause interfer­
ence in the radio and the vehicle electronics .
67

In extreme cases, EDL automatically switches off
to help keep the brake on the braked wheel from
overheating. EDL w ill switch on aga in a utomati­
cally when conditions have returned to normal.
Ste ering recommendat ion
The ESC helps to stabilize the ve hicle by chang ing
the s teering torque .
I n vehicles with dynamic steering*, ESC also
h e lps to s tabilize the stee ring in critical s itua­
tions.
Selective wh eel torqu e control
Select ive whee l torque control is used when driv­
in g on curves . T he front wheel on the inside of
the cu rve or both wheels o n the inside of the
curve are br aked selec tively as needed . This al ­
l ows more precise driv ing in curves . The applica­
b le system may not activate when driving in wet
or snowy conditions.
Automatic post-collision braking system
The "Automatic post-co llision bra king system"
can help to reduce the ris k of slid ing and of other
coll is ions after an accident. If the airbag contro l
module detects a col lision above a certain vehicle
speed, the vehicle is b raked by t he ESC.
The vehicle does not b rake automatica lly if :
- the driver p resses the accelerator pedal, or
- the braking force generated by the pressed
brake pedal is greate r than the brak ing force
that wou ld be initiated by the system, or
- the ESC, the brake system or the vehicle electri ­
ca l system are not f unction ing .
Sma rt Technology
A WARNING
- The ESC and its integrated systems cannot
overcome the limits posed by natural physi­
cal laws . This is especia lly important on s lip­
pe ry o r we t roads .
If the systems beg in act­
i n g to stab iliz e your ve hicle, yo u should im­
mediately change yo ur speed to ma tch the
road and traffic con dit ions . Do not let the
increased safety provided by these systems
tempt you to take r isks. Do ing so will in­
crease the r isk of a loss of vehicle contro l,
coll is ion and serious pe rsonal in juries.
- Always adapt your speed to road, traffic and
weather conditions. The risk of losing con­
trol of the vehicle increases when driving too fast, especially through curves and on
slippery or wet roads, and when driving too
close to vehi cles up ahead. The ESC and its
i n teg ra ted systems ca nnot alw ays preven t
coll is io ns -the re is s till a risk of accide nts!
- Always accelerate w ith specia l care on even,
smooth s urfaces su ch as those that are wet
or covere d wi th ice and snow. The d rive
whee ls can spin eve n wit h these assistance
systems that cannot always help to reduce
the risk of loss of vehicle contro l.
(D Tips
-ABS a nd ASR only wo rk cor rec tly when all
four wheels a re equipped wi th identi cal
tires. Diffe rent tire s izes can lead to a red uc­
tion i n engine power .
- You may hear noises when the systems de ­
scribed are working .
191

Driving and th e en vironm ent
pollutants in the exha ust gas before they are re ­
leased into the atmosphere.
The exclusive use of unleaded fue l is critica lly im­
portant for the l ife of the catalytic converter and
proper functioning of the engine.
A WARNING
T he temperature of the exha ust system is
high, both when driving and after stopping
the engine.
-
- Never touch the exhaust tail pipes once they
have become hot. This could result in burns.
- Do not park or operate the vehicle in areas
where the hot exha ust system may come in
contact with dry grass, brush, fue l spill or
other mater ial which can cause a fire.
- Do not apply additional undercoating or rustproofing on or near the exhaust mani­
fold, exhaust p ipes, catalytic converter or
heat sh ields. During dr iv ing, the substance
used fo r undercoating could overheat and
ca use a fire.
(D Note
- Be aware that just one tank filling with
le aded fuel will already ser iously degrade
the performance of the catalytic co nverter .
- Do not exceed the correct eng ine oil level
<=;> page 225.
-Do not drive until the fuel tank becomes
complete ly empty. The engine could mis­
fire. Unburned fuel could also get into the
exhaust system and this cou ld cause the
cataly tic converte r to overheat.
- Do not sw itch off the ignition while the veh i­
cle is moving.
- Do not continue to operate your vehicle un­
der these cond it ions, as otherwise fue l can
r each the catalyti c converte r. This cou ld re­
su lt in overheating of the conve rter, req uir­
i ng its replacement.
- T o assure efficient oper ation of the Emis­
s ion Control Sys tem:
- Have your veh icle maintained properly and
in accordance with the service recommen­
dations in your Warranty
& Maintenance
book let .
198
-Lack of proper ma intenance as well as im ­
proper use of the vehicle wi ll impair the
funct ion o f the emission control system
and could lead to damage.
@ For the sake of the environment
Even when the Emiss ion Control System is op ­
erating properly, the exhaust gas can have a
su lfu r-li ke exhaust gas sme ll under some op­
erating states. Th is depends on the sulfur
content of the fuel being used. Us ing a d iffer­
ent brand of fuel may help, or fi lling the tank
with lead-free super g rade gasoline.
Diesel particulate filter
App lies to: vehicles with diese l engine
The diesel particulate filter filters nearly all of
the soot part icles out of the exhaus t. The filte r
clea ns itself automat ica lly unde r no rma l dr iv ing
cond it ions. If the fil ter canno t clean i tself (fo r ex­
amp le, because yo u are on ly driving short distan­
ces), the filter becomes clogged with soot and
the
II symbol for the diese l particu late filter il­
l uminates
¢ page 20.
A WARNING
- Do not park your vehicle over flammable
materials such as grass or leaves because
the high temperature of the diesel particu­
la te filte r could sta rt a fi re.
-
- Do not apply an underbody protectant in the
exhaust system area or a fire could start.
Shutting down vehicle
If you would like your vehicle to remain inopera­
tive for a longer period of time, contact an Audi
or other spec ia lized dealer . They can adv ise you
o n necessary p recautions e .g. corros ion preven­
tion, ma intenance and storage . Pay attention to
additional informat ion concer ning t he battery.
Refer to
<::;> page 2 31.

Cooling system
Coolant
The engine coolant performs two functions: it
keeps the engine from overheating and it pro ­
tects the engine from freezing in the winter .
The cooling system is sealed and generally re­
quires little attention.
T he 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
specially condit ioned water and the manufactur ­
er's glycol-based coolant additive Gl3 antifreeze
with anticorrosion additives (SO% for USA mod­
e ls; 60% for Canadian mode ls). This m ixture
both ass ures the necessa ry frost protection and
protects metal components in the engine's coo l­
ing system from corrosion and scaling .
It also
raises the boiling point of the coolant.
Do not red uce the concent ration of the coolant in
the summer by adding p lain water.
The propor­
tion of coolant addit ive mu st be at least 50 %
but not more than 60 %
to mainta in antifreeze
protection and cooling efficiency. If the coolant
frost protection is too low, the coolant could
freeze and damage the vehicle heating and en­
g ine cooling system .
For year-round driving, antifree ze is added at the
factory for temperatures down to :
- -31° F(- 3S°C)USA
- - 40 ° F ( - 40 °C) Canada.
If you must add coolant, use a m ixture of water
and coolant addit ive. M ixing the coolant additive
with d istilled water is recommended .
_& WARNING
Before you check anythi ng i n t he engine com­
partment, always read and heed all WARN ­
INGS
¢ .&. in Working in the engine compart­
ment on page 220 .
(D Note
-Befo re winter se ts in, have the coo lant
checked to see if the coolant additive in your
vehicle is sufficient to meet the cl imate con -
Check ing and Filling
ditions. This is especially important if you
live in a region where the winter is extreme­
ly cold. If necessary, increase the proportion
of coolant additive to 60%.
- When adding coolant additive to your cool­
ing system, remember :
- We recommend us ing only coolant add i­
tive Gl2+ + or Gl3 for yo ur vehicle. This
coolant addit ive is avai lab le at aut horized
A udi dealers . O ther types of antifree ze can
significantly reduce corrosion pro tect ion .
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 ra ­
diator repair fluid may adversely affect the
function and performance of your cooling system and cou ld resu lt in damage not cov­
ered by your New Veh icle Limited Warra nty .
Checking the engine coolant level
The engine coolant level can be checked with a
quick glance.
Fi g. 2 01 Engin e compar tmen t: cover o n th e coo lant expan ­
sion t ank
Before you check anything in the engine compart­
ment,
always read and heed all WARNINGS
¢ A in Working in the engine compartment on
page 220 .
Park your vehicle on a level surface .
.,. Switch off the ignition .
.,. Read the engine coolant level from the coo lant
expansion tank
¢ fig . 201, ¢page 222. With a
cold engine, the coolant level should be be-
tween the "min" and "max" markings. When .,.
227

Checking and Filling
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 222.
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 15 will il­
luminate 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 immediately 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 re­
sult 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.
- Turn off the engine and allow it to cool
down.
- Protect your face, hands and arms from es­
caping 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 anti­
freeze or coolant on the exhaust system or
hot engine parts. Under certain conditions,
the ethylene glycol in engine coolant can
catch fire.
228
(D Note
Do not add any type of radiator leak sealant
to your vehicle's engine coolant. Adding radia­
tor 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 compart­
ment,
always read and heed all WARNINGS
¢.& in Working in the engine compartment on
page 220 .
.. Requirement: There must be a residual amount
of coolant in the expansion tank ¢(D .
.. Turn off the engine .
.. Let the engine cool down .
.. Place a thick rag over the coolant expansion
tank ¢
page 22 7, fig. 201 and carefully twist
the cap counter-clockwise ¢&, .
.,. Add coolant mixed in the correct ratio
r::!> page 22 7, Coolant up to the MAX marking.
.. Make sure that the fluid level remains stable.
Add more coolant if necessary .
.. Twist the cap on again
tightly.
Replacement engine coolant must conform to ex­
act specifications ¢
page 22 7, Coolant.
We recommend using only coolant additive G12+
+, G13 or in an emergency G12+ . Do
not use a
different additive. In an emergency use plain wa­
ter until you can get the correct additive and can
restore the correct ratio. This should be done as
soon as possible.
If you have lost a considerable amount of cool­
ant, then you should add cold antifreeze and cold
water only when the engine is cold.
Always 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 engine becomes
hot.
~