2014 AUDI S8 radiator

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 . .,.

Stee ring lock
The stee ring locks when you t urn the engine
off us ing the
I S TAR T ENGINE STOP! button
and open the driver 's door . The locked steer­
i ng he lps pr event ve hicle theft.
E mergenc y off
If necessary , the eng ine can be sw itched off
with the selector leve r in the R, Dor S pos i­
tions . The engine stops i f you press the
I S TART ENGINE STOP! button at speeds below
6 mph (10 km/h) .
.&_ WARNING
- Never turn off the eng ine before the ve­
hicle has come to a complete stop. The
full function of the brake booster and the power steering is not quaranteed. You
must use mo re force to turn or brake if
necessary. Because you cannot steer and
brake as you usua lly would, this could
lead to crashes and serious injur ies.
- For safety reasons, you shou ld always
par k your vehicle with the se lector lever
in P. Otherwise, the veh icle co uld inad ­
vertent ly roll away .
- After the engine has been switched off,
the radiator fan can continue to r un for
up to 10 mi nutes -even with the ignition
switched off.
It can a lso switch on aga in
after some time if the coolant tempera­
ture rises as the result of a heat buildup
or if the engine is hot and the engine
compartment is addit ionally heated by
the sun's rays .
0 Note
Do not stop the engine immed iate ly after
hard or extended dr iving . Keep the engine
r u nning for approximately two minutes to
prevent excessive heat build-up.
Driver message in the instrument
cluster display
Turn off ignition before leaving car
On th e ro ad 85
This message appears and a warning tone
sounds if you open the driver's door when the
ignition is sw itched on.
Pre ss brak e pedal t o sta rt engine
This message appears if yo u press the
I STAR T ENG IN E S TOP I button to start the en­
gine and do not dep ress the br ake pedal. The
engine can only be s tarte d if the brake pedal
is depressed.
I!! I s key in th e vehi cle?
If the indicator light turns on and the mes­
sage appears, the remote control key was re­
moved from the vehicle whi le the engine was
run ning . If the ignition key is not in the veh i­
cl e you will not be able to swi tch on the igni­
tion or res tart the engine after i t has been
switched off. You will a lso not be able to lock
the ve hicle from the outsid e.
Shift to P, oth erwi se v ehicle can roll aw ay.
Do ors d o n ot lo ck if lever is not in P .
This dr iver message appears for safety rea­
sons if the transmission has not bee n shifted
to the P position when you switc h the ign ition
off . Move the selec to r l ever to the P posi tion .
Otherwise the vehicle is not protected from
ro lling and cannot be locked.
fl Key is not r ecognized. Hold back of key
again st marked area . See ow ner' s m anu al.
If the indicato r light turns on and this mes­
sage appea rs, there is a malfunct ion
~ page 86.
Turn off ign ition before lea ving ca r. Battery
is d is c harging
This message appears if the driver's door is
opened wh ile the ignition is switched on . Al­
ways switch off the ign it ion if you a re leav ing
the ve hicle . See also
Q page 90 .
Shift to P and turn off ignition before lea v­
ing car, otherwi se v ehicle can roll away
T his messag e app ears if the driver's door is
opened wh ile the ignition is switched on and
the selector lever is not in the P posit ion. Shift
the selecto r lever into the P pos ition and .,..

long side of the blue surface so that there is
suff icient space from the obstacle. The sur ­
face must not be touch ing. You will also need
to start turning the steer ing whee l much ear­
lier. The blue curve
¢ fig . 13 7 must not to uch
the obstacle and should have sufficient room .
@ Tips
The left or right orientation lines and sur­
faces will be displayed, depend ing on the
turn signa l bei ng used.
Peripheral cameras
Introduction
Applies to vehicles: with top view camera system
In addit ion to the functions from the sensors
¢ page 123, Sensors,¢ page 125 , Visual dis­
play,
this parking system conta ins peripheral
cameras. Depending on the ve hicle equip­
ment, you are assis ted by various views such
as peripheral view, corner views at the front
and rear of the veh icle, and views d irectly in
fro nt of o r behind the vehicle.
General information
App lies to vehicles: with top view camera system
Fig. 138 Loca tion of per ipheral came ras
Depending on the vehicle equ ipment, the pe­
riphera l cameras are fou nd i n the radiator
grille, in the luggage compartment lid and on both exterior mirrors ¢
fig. 138 . Make sure
that the lenses are no t covered by deposits or
any other obstructions as it may impair the
sys tem. For information on cleaning, refer to
¢ page 216.
P arking sys tems 127
In the to p view mode, b lack corners are
shown in the ve hicle silhouette . Objects in
these areas are outside of the camera 's field
of view and are not detected .
T he accuracy of the orientation lines and the
bl ue surfaces is reduced if the adaptive air
suspension * is faulty, if the vehicle is lifted or
if the
dynamic mode is activated ¢ page 110.
A WARNING
- Always read and follow the applicable
warn ings ¢
& in General information on
page 122.
- If the position or the installat io n angle
of a camera was changed , after a colli­
sion for example, do not continue to use
the system fo r safety reaso ns. Have i t
checked by you r author ized Audi dealer­
sh ip .
- Keep in mind tha t the image in the dis­
pl ay is distorte d if the exterior mirror
housing has bee n manually a dju sted .
- Use the
rear mode and the c orner view
( rear )
mode only when the luggage com­
partment lid is fu lly closed . Otherwise
the image in the disp lay will be d istort­
ed .
- T he vehicle surro undings are shown us ­
ing the came ra images. The veh icle im ­
age is shown by the system. Objects and
obstacles above the camera are not d is­
p layed.
- Camera lenses enlarge and distort the fie ld of vision . T he objects appear both
altered and inaccurate on the sc reen.
(D Note
- Always read and follow the ap plicable
warnings
¢(Din General information on
page 122.
- The Infotainment d isp lay shows the di ­
rection in which the rear of the vehicle is
traveling based on the steer ing whee l
ang le . The front of the vehicle front
swings out more than the rear of the ve­
hicle . Maintain plenty of d istance so that
IJJ,,

232 Check ing and filling
- Always disconnect the battery.
- Never smoke or work near heaters or open flames . Fluids in the engine com­
partment could start a fire.
- Keep an approved fire extinguisher im­
mediately available.
- To avoid electrical shock and persona l in ­
jury 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 repa ir
with the engine running:
- Fi rst, fully apply the parking bra ke,
move se lec to r lever to "P" (Park) .
- Always use extreme caution to preven t
clot hing, jewe lry, or long h air from ge t­
ting caught in the radiator fan, V -belts
or other moving parts, or from contact­ ing hot parts . Tie back hair before
start ing, and do not wear cloth ing that
will hang or droop into the eng ine .
- Min imize exposure to emission and
chemica l hazards¢ ,&..
A WARNING
California Propos ition 65 Warning:
- Engine exhaust, some of its constituents,
and certa in veh icle components conta in
or emit chemicals known to the State of
Califor nia to cause cancer and b irth de­
fec ts a nd reproduct ive ha rm. In addition ,
certain fluids conta ined in vehicles and
certa in prod ucts of co mponent wear co n­
ta in o r emi t chemicals known to the
State o f Ca lifornia to cause can cer and
birth defects or ot her reproductive harm . -
Battery posts, terminals and re lated ac­
cessories conta in lead and lead com­
pounds, chemicals known to the State of
California to cause cance r and reproduc­
tive harms. Wash hands after handling .
(D Note
When adding flu ids, always make sure that
they are poured into the proper conta iner
or f iller opening, otherwise serious dam­
age to vehicle systems w ill occur.
® For the sake of the environment
To detect leaks in time, inspect the vehicle
floor pan from underneath regularly. If
you see spots from oil or other ve hicle flu­
i ds, have yo ur vehicle inspected by a n au­
thori zed Audi dea le r.
Closing the engine hood
.,. Pull the hood down un til the pressure from
t he struts is reduced.
.,. Let the hood
drop down and latch in p lace .
Do not try to push it shut; it may fail to en­
gage ¢&_ .
A WARNING
-
A hood that is not completely latched
could fly up and b lock your view while dr iv ­
ing .
-When you close the engine hood, check it
to make sure the safety catch has p roper ­
ly engaged. The hood sho uld be flush
with the surrou nding vehicle body pa rts.
- If you notice while driv ing t hat the hood
is not s ecured prope rly, stop at onc e and
close it.

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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242 Checking and filling
-The auxiliary e lectric fan is temperature
controlled and can switch on suddenly
even when the engine is not runn ing.
- The auxiliary radiator fan switches on au­
tomatically when the engine coolant
reaches a certain temperature and will
continue to run until the coolant temper­
ature drops .
Brake fluid
Checking brake fluid level
The brake fluid level can be checked with a
quick glance.
Fig . 205 E ng ine co mpartment: cove r on the brake fluid
r eservo ir
Before you check anything in the engine com­
partment,
always read and heed all WARN­
INGS 9 &_ in Working in the engine compart­
m ent on page 231.
.. Read the brake fluid level from the brake
fluid reservoir
9 fig . 205, q page 233. The
brake fluid leve l must be between the "MIN"
and "MAX" markings.
The location of the brake fl uid reservoir can be
seen in the engine compartment illustrat ion
9 page233.
The fluid level may drop slightly after some
time due to the automatic adjustment of the
brake pads. This is not cause for alarm.
If the brake fluid level falls
considerably be­
low the "MIN" mark, the brake warning/ind i­
cator light
1111 (U.S. models)/ . (Canadian
models) will come on
q page 14. Do not con­
tinue to operate the vehicle . T he complete
brake system should be thoroughly checked by an authorized Audi dealer or other quali­
fied fac ility and the cause corrected.
If th e
brake flu id level is too low, the brake wa rning/
indicator light will illuminate. Contact an au­
thorized Audi dealer
immediately.
Changing brake fluid
Have the brake fluid changed by on experi­
enced technician.
Brake fluid absorbs moisture from the air. If
the water content in the brake fluid is too
high, corrosion in the brake system may result
a fter a period of time. The boiling point of the
brake fluid will also decrease considerably and
decrease braking performance .
Therefore, the brake fluid must be changed
every two years. Always use new brake flu id
which conforms to Federal Motor Veh icle
Standard "FMVSS 116 DOT 4" .
The brake fluid reservoir can be difficu lt to
reach, therefore, we recommend that you
have the brake fluid changed by your author ­
ized
Audi dealer . Your dealer has the correct
tools, the right brake fluid and the know-how
to do this for you .
.&, WARNING
-Brake fluid is poisonous. It must be stor­
ed only in the closed origina l container
out of the reach of children!
- Brake failure can result from old or inap­
propriate brake fluid. Observe these pre­
cautions:
- Use only brake fluid that meets SAE
spec ification
J 1703 and conforms to
Federa l Motor Vehicle Standard 116.
Always check with your authorized Aud i
dealer to make sure you are using the
correct brake fluid. The correct type of
brake fluid is also indicated on the
brake fluid reservoir .
- The brake fluid must be new. Heavy use
of the brakes can cause a vapor lock if
the brake fluid is Left in the system too
lllJ.

complexity of today's automobi les, have
steadi ly reduced the scope of maintenance
and repairs which can be carried out by vehicle
owners.
Also, safe ty and e nvir onm en tal con­
cerns place very strict limits on the na ture of
repairs and adjustments to engine and trans ­
miss io n pa rts which an owner can perform .
Maintenance, adjustments and repairs usua lly
require special tools, testing devices and oth­
er equipment avai lab le to specially trained
workshop personnel in order to assure prope r
performance, reliab ility and safety of the vehi­
cle and its many systems .
Improper ma intenance, adjustments and re ­
pa irs can impair the operation and reliability
of your vehicle and even void your vehicle war­ ranty. The refo re, p roof of servici ng in accord­
ance w ith the maintenance sched ule may be a
condition for upholding a poss ible war ranty
claim made within the warranty period.
Above all, operational safety can be adversely
affected, crea ting unnecessary risks for you
and your passengers.
If in doubt about any servicing, have it done
by your authorized Audi dealer or any other
properly equipped and q ualified workshop .
We strong ly urge you to give you r a uthorized
Audi dealer the opportunity to perform all
schedu led maintenance and necessary repairs .
Your dea ler has the facilities, or iginal parts
and trained spec ialists to keep your vehicle
running properly.
Performing limit ed m aintenance you rself
The following pages describe a limited num­
ber of procedures which can be performed on
your vehicle with ordinary too ls, should the
need arise and trained personnel be unavaila­
b le. Before performing any of these proce­
dures, always thoroughly read all of the app li­
cable text and carefully follow the instruc­
tions given . Always rigorously obse rve the
WARNINGS provided .
Before you check anything in th e engine
compartment, a lway s re ad and heed all
Con sumer In formation 293
WARNINGS ¢ & and ¢ & in Working in the
engine comportment on page 231 .
A WARNING
-Ser ious personal injury may occur as a re­
sult of improperly performed mainte­ nance, adjustments or repa irs.
-Always be extremely careful when work­
ing on the vehicle. Always follow com­
mon ly accepted safety practices and gen­
eral common sense . Never r isk personal
lnJU ry .
- Do not attempt any of the ma intenance ,
checks or repairs descr ibed on the fol­
lowing pages if you are not fully fam iliar
wit h these or othe r pro cedures with re­
spect to t he veh icle, or are uncerta in how
to p roceed .
- Do not do any work without the proper
too ls and equipment. Have the necessary
work done by your authorized A udi deal ­
er or another proper ly equipped and
qualified workshop .
- The engine compartment o f any motor
veh icle is a potentially hazardous area.
Never reach into the area around or
touch the radiator fan. It is temperature
contro lled and can switch on suddenly -
even when the engine is
off . The radiator
fan switches on automat ically when the
coo lant reaches a certai n temperature
and will cont inue to run until the coo lan t
temper ature drops.
- Always sw itch
off the ignition before any­
one gets under the vehicle.
- Always support your veh icle with safety
stands if it is necessary to work under­
neath the vehicle . The j ack s upplied with
the vehicle is not adequate for this pur­
pose and cou ld collapse causing serio us
personal i njury .
- I f you must work unde rneath the vehicle
with the wheels on the ground, a lways
make sure the vehicle is on leve l ground,
that the wheels are a lways securely
blocked and that the engine cannot be
started.
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