lock AUDI S8 2014 Repair Manual

~ Start the engine.
~ Se lect the D selector lever position.
~ Re lease the park ing brake and slowly pull
out and away from the wheel chocks .
~ Stop and have someone retrieve the wheel
chocks.
(D Tips
If you move the selector lever of the auto­
matic transm ission to P before applying
the parking brake and before blocking the
wheels, you may have to use more force
later to move the lever out of the P posi­
tion .
Trailer towing 215
•
•

224 Fuel supply and filling your fuel tank
Winter operation
At temperatures below 20° F (-7° C), Diesel
fuel No.
2 loses its fluidity due to wax separa­
tion, which may clog the fuel filter or tank fil­
ter and keep the engine from running .
To help the filter from being clogged by wax,
the fue l filter in your vehicle is automatically
preheated. Preheating the fuel filter makes
operation of your vehicle possible with Diesel
fuel No. 2 down to -10° F (-24° C).
If you expect temperatures below
5° F
(-15° C)
ask your fuel dealer whether their
Diese l fuel No.
2 is sufficiently winterized for
the prevailing and expected temperatures.
If not winterized or insufficiently winterized
Diesel fuel has already thickened to the extent
that the engine will not start, warm the vehi­
cle up by leaving it in a heated garage.
It is normal that the engine noise leve l (die­
seling) is louder during the warm-up period in
winter. It is also norma l when whitish-blue
smoke comes out of the tailpipe after starting
and during warm-up . The amount of smoke
depends on the outs ide temperature.
Do not let your Diese l engine idle unnecessari ­
ly after a cold start. Driving off slowly will
shorten the warm-up period.
A WARNING
- Never use "starting assist fluids." They
may be potent ially explosive or cause a
"run-away" engine condition. This could
result in ser ious engine damage and per­
sonal injur y.
- Never use fuel line anti-freeze offered for
gasoline engines.
(D Note
- Your Diesel engine has been specifically designed to operate only on Ultra Low
Sulfur Diesel fuel. Therefore, never use
home heating oil or regular gasoline. The
properties of these fuels may cause seri­
ous damage to the fuel injection system
and to the engine. Using these fuels can
-
cause expensive engine repairs and will
also adversely affect your New Vehicle
Limited Warranty.
- If Diesel fuel sho uld get on any rubber
hose, it must be wiped off immediately.
Then wash the contaminated hose por­
tion with soap and warm water. Do not allow D iesel fuel to remain on connect­
ing hoses . They may develop leaks and
cause serious damage.
Fuel tank
Fuel filler neck
The fuel filler neck is located on the right rear
side panel behind the fuel filler flap.
If the power locking system shou ld fail, you
can still open the flap manua lly -for detailed
instructions see ¢
page 22 7.
You can find the fuel tank capacity of your ve­
hicle in ¢
page 290.
The label on the inside of the fuel filler flap
te lls you the correct fuel for your vehicle. For
more information about fuel specifications,
see ¢
page 222.
Your vehicle fuel tank has an on board refuel­
ling vapo r recovery system. This feature helps
to prevent fue l vapors from escaping from the
tank and polluting the environment while you refuel your vehicle. In order to fi ll the tank
proper ly while protecting the environment,
please fo llow this refueling procedure careful­
ly.
A WARNING
-Under normal operating conditions, never
carry addit ional fuel conta iners in your car .
Gas canisters and other conta iners used to
transport fuel can be dangerous. Such con­
tainers, full or empty, may leak and could
cause a fire in a collision.
If you must
transport fuel to use for your lawn mower,
snow blower, etc., be very careful and al ­
ways observe loca l and state laws regard­
ing the use, transportation and storage of
such fuel containers. Make certain the ..,.

container meets industry standards (ANSI/
ASTM F852 -86).
(D Note
Never drive yo ur vehicle unt il the fuel tank
is complete ly empty. The irregular supply
of fuel can cause misfiring . Gasoline could
enter the exhaust system and damage the
catalyt ic converter.
Refuelling
•
F ig. 190 Righ t rear vehicle side: Opening th e fue l fill er
flap
F ig. 191 Fu el filler flap wit h at tached fue l cap
When activating the central locking, the fuel
filler flap is automatically unlocked or locked.
Refuel the vehicle with the ign ition switched
off.
Tak ing the fuel c ap off
.,. Press the left side of the fuel filler flap to
open it ¢
fig . 190 -arrow -.
.,. Unscrew fuel filler cap counter-clockwise
and hang it on the fuel fille r flap ¢
fig. 191.
.,. Check the label on the inside of the fuel fi ll­
er flap to determine if the vehicle must be
fueled with gasoline or diesel f uel.
Fuel suppl y and filli ng your fuel t ank 225
Refuelling proce dur e
.,. Insert the fuel nozzle from the gasoline
pump into the fuel fi ller neck as far as it wi ll
go .
.,. Select a medium refuelling rate so that the
nozz le switches off automatically when the
tank is full.
Pu tting th e fuel cap bac k on
.,. After filling your tank, twist the fuel filler
cap clockwise as far as it wi ll go.
.,. Close the fue l filler flap.
T o avoid fuel spill ing or evaporating from the
fuel tank always close fuel filler cap properly
and completely . An improperly closed fuel fill­
er cap may also cause the MIL lamp¢
page 29
to come on (only vehicles with gasoline en­
gine).
A WARNING
Improper refue ling or handling of fuel can
cause fire, explosion and severe burns.
- Fuel is highly flammable and can cause
severe burns and other injur ies.
- Failure to shut the engine off wh ile refu­
eling and/or to insert the pump nozzle
fully into the fuel filler neck could cause
fue l to spray out of filler neck or to over­
f low. Fue l spray and overflowing fue l can
cause a fire.
- Never use a ce ll ular telephone while re­
fueling. The electromagnet ic rad iation
can cause sparks that can ignite fuel va­
pors and cause a fire.
- Never get back into yo ur vehicle whi le re­
fueling. If in exceptional circumstances
you must get back in your vehicle while
refueling, make certain that you close
the door and touch metal to discharge
stat ic electricity before touching the fill­
er nozzle again. Static e lectr icity can
cause sparks that can ignite fuel vapors re leased du ring refuel ing .
- Never smoke or have an open flame any­
where in or near your veh icle when refu-
eling or fi lling a portab le fue l conta iner.
ll>

226 Fuel su ppl y and fi lling yo ur fu el t an k
- For your safety , we strongly recommend
that you do not travel with a portable
fuel container in your vehicle. The con­
tainer, full or empty may leak and could cause a fire, especially in a crash.
- If, under exceptional circumstances, you
must transport a portable fuel container,
please observe the following:
- Never fill a portab le fuel container
while it is anywhere in or on the vehicle
(for example, in the luggage compart­
ment, or on the trunk). Static electrici­
ty can build up while filling and can ig­ n ite fuel vapors causing a fire .
- Always place a portable fuel container
on the ground before filling.
- Always keep the fi ller nozzle complete­
ly inside the portable container before
and during filling.
- If filling a portable container made of
metal, the filler nozzle must always be
in contact with the container . This will
help prevent static electricity from dis­
charging and cause a fire .
- Never sp ill fuel inside the vehicle or
luggage compartment. Fuel vapors are
h ighly flammable.
- Always observe local and state/provin­
cial laws regarding the use, storage
and transpo rtation of fuel conta iners.
- Make certa in the fuel container meets
industry standards (ANSI/ ASTM
F8S2-86).
@ Note
If any fuel has spilled onto the car, it
should be removed immed iately to prevent
damage to the paint .
@) For the sake of the environment
As soon as the correctly operated nozzle
sw itches off automatically for the first
time, the tank is full . Do not try to add
mo re fuel because fuel may spill out. In
add it ion, the expans ion space in the fuel
tank will be f illed -causing the fue l to overflow when it becomes warm and pol­
lute the environment .
(D Tips
-Running your engine whi le refue lling
may cause vapors to escape or even
cause fuel to spi ll out of the tank. This
would then shut off the fue l nozzle be­
fore the tank is full.
- Do not refuel your vehicle with the igni­
tion switched on. The fuel gauge may
otherwise not indicate the correct fuel
level after refuelling .
- Diesel vehicles* are equipped with a die­ sel misfueling protector. It allows the
vehicle to be fueled only with a diesel
fuel pump nozzle. A worn or damaged nozzle or a nozzle that is too small may
not be ab le to open the diesel misfueling
protector. If this is the case, try turning
the nozzle before insert ing it in the f uel
filler neck, use a different fuel pump or
see your authorized Audi dea ler or au­
thorized repair facility for assistance.
- The fuel fi ller f lap of your vehicle is not
locked when you lock the vehicle from
the inside.

Fuel filler flap emergency release
You can open the fuel filler flap by hand if the
power locking system should fail.
Fig . 192 Veh icles w it h select ive catalytic reduct ion :
R ig ht side trim pane l
Fig . 1 93 Right side trim pa ne l in the lu ggage compart ­
ment: emergency release mechan ism
The emergency release mechanism is located
behind the right side trim pa ne l in the lug­
gage compartmen t. In vehicles with se lec tive
catalyt ic red uction *, remove the ve nt gri lle
first:
• Press b oth tabs @
r:::;, fig. 192 and ti lt the
ven t grille downward . You can then remove
t h e g rille upwa rd .
• Loosen the loop
r:::;, fig. 193 from the retainer
and then pull on the loop carefully
r:::;, (D ,
• Press on the left s ide of the fuel filler door
to open
r:::;, page 225, fig . 190.
(D Note
O nl y pull on the loop until you feel resist­
ance. You will not hear it release. Other­
w ise you cou ld damage t he emergency re­
lease mechanism .
Fuel suppl y and filli ng your fuel t ank 22 7
Selective catalytic
reduction
General information
Applies to vehicles: wi th diesel engine
On vehicles with se lective cata lytic reduction,
an urea solution (AdB lue) is injected into the
exhaust system before a n itrogen oxide cata­
lytic converter to reduce nitrogen emissions.
The Ad Blue is stored in a separate tank in t he
vehicle. The Ad Blue usage accounts for ap­
proximately 0.5% to 1.2% of the d iesel fue l
that is used.
You must refill the Ad Blue or have it refi lled
by your aut horized Audi dea ler or qua lified
workshop as soon as the Ad Blue refill mes­
sage appears in the instrument cluster
c;, page 229.
A WARNING
Failure to heed AdBlue refill information in
the instrument clus ter can prevent the ve­
hicl e from be ing started and dr iven. If the
vehi cle can not be driven and an emergen cy
ar ises, pe rsonal inju ry c an o ccu r.
- Always have the Ad Blue tank refi lled we ll
befo re the tank runs dry.
(i'} Tips
- Th e instr ument cluster d isplay ind icates
t he distance remain ing that can be d riv­
en
r:::;, page 228. I f th e A d Bl ue tank is
c omple tely empty, t he eng ine will not
sta rt ag ain afte r th e ig niti on is swit ched
off.
-Ad Blue is requi red by law t o opera te th is
vehicle.

Filling AdBlue
Applies to vehicles: wit h diesel engine
A special refill bottle must be used to fill the
AdBlue .
Fig. 195 Right rear ve hicle s ide: remov ing the Ad B lu e
cap
Fi g. 196 AdBl ue filler tube: inse rt in g the ref ill bott le
The Ad B lue fi ller tube is located near the die­
sel filler tube . Always add 1 gallon (3.8 liters)
of AdBlue (two bottles). This is the m inimum
amount req uired to ensure the system detects
the ref illing and to start the engi ne. The Ad Bl­
ue tank capac ity is approximate ly 6 gallons
(23 liters) .
Opening the filler tube and adding
AdBlu e
Requirement: The request to add Ad B lue m ust
appear in the inst rument cluster display.
.. Switch the ignition off .
.. Open the tank cover
¢page 225 .
.. Turn the cap counte rclockw ise with the l ug
wrenc h from the veh icle tool k it to remove it
~fig . 195.
.. Remove the cap from the refill bottle.
.. Position the refill bottle on the filler tube
and turn the bottle clockwise unt il it stops
turning
(D ¢ fig . 196.
Fu el suppl y and filli ng your fuel t ank 229
.. Press ligh tly against the bottom of the bot ­
tle @ to empty it. Continue pressing the
bottom of the bottle unt il it is empty or un ­
til f luid stops flowing into the tank.
.. Turn the bottle to the left w ithout pressing
on the bottom .
Clo sing the filler tube
.. Turn the cap clockwise on the filler tube
w ith the lug wrench until you hear it t ighten
completely .
.. Close the tank cover.
After filling
The vehicle must be driven . The system may
take up to two minutes to detect t hat the
AdB lue has been f illed .
.. If the re was no Ad Blue left in the tank and a
range of
O mi (0 km ) was displayed in the
instrument cluster, switch the ignition on
for about 15 seconds before start ing the en­
gine.
A WARNING
Ad B lue can irritate the sk in , eyes and res­
p ira to ry system .
If there is contact with
the fluid, flush immedia tely with plenty of
wa ter . Co nsu lt a phys ician if ne cessary.
(D Note
- On ly use AdB lue that conforms to the
s tandar d ISO 22241-1. Do not mix any
add itives w ith the AdBlue and do not d i­
lute it wi th water.
- Ad Blue is not a diesel add itive . Do not
add it to the diese l tank. If AdBl ue is
m ixed wi th diesel f uel, it can lead to
d amage to the engine an d the AdBl ue
t ank system . The Limited New Vehicle
W arranty does not cove r such damage .
- Ad B lue attacks su rfaces s uch as painted
vehicle components, p las tic a nd carpet .
Remove t he fluid as quickly as possible
w ith a damp cloth and p lenty o f cold wa­
ter. If the Ad Bl ue has already crystal-
lized, use warm water and a sponge. ..,_

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>-
•
•

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.