ignition AUDI A8 2017 Repair Manual

Checking and Filling
-Set the parking brake.
- Select the P selector lever position.
- Let the engine cool down.
- Never open the hood when there is steam or
coolant escaping from the engine compart­
ment, because there is a risk that you could
be burned. Wait until no steam or coolant is
escaping.
- Keep children away from the engine com­
partment.
- Never spill fluids on a hot engine. These flu­
ids (such as the anti-freezing agent con­
tained in the coolant) can ignite.
- Avoid short circuits in the electrical system.
- When working in the engine compartment,
remember that the radiator fan can switch
on even if the ignition is switched off, which
increases the risk of personal injury.
- Never open the cap on the coolant expan­
sion tank when the engine is warm. The
cooling system is under pressure.
- To protect your face, hands, and arms from
hot steam or coolant, cover the cap with a
large cloth when opening.
- Do not remove the engine cover under any
circumstances. This increases the risk of
burns.
- If tests need to be performed with the en­
gine running, there is additional danger due
to moving components (such as the ribbed
belt, alternator and radiator fan) and from
the high-voltage ignition system .
- Do not under any circumstances activate the
throttle inadvertently (for example, by hand
from the engine compartment) if the vehi­
cle is stationary but the engine is running
and a gear is engaged. Otherwise, the vehi­
cle will start to move immediately and this
could result in an accident.
- Pay attention to the following warnings list­
ed when work on the fuel system or on the
electrical equipment is required.
- Do not smoke .
- Never work near open flames.
- Always have a working fire extinguisher
nearby
- All work on the battery or electrical system
in your vehicle can result in injuries, chemi-
272
cal burns, accidents or burns. Because of
this, all work must be performed
only by an
authorized Audi dealer or authorized Audi
Service Facility .
- To reduce the risk of electric shock and in­
jury, never touch the following components when the engine is running or is being start­
ed:
- Ignition cable
- Other components in the electronic high-
voltage ignition system
- If you must check or perform work on the
engine while it is running:
- Set the parking brake and place the selec­ tor lever in the P (park) position first.
- Always proceed with extreme caution so
that clothing, jewelry or long hair do not
become caught in the radiator fan, fan
belt or other moving components or do
not come into contact with hot compo­
nents . Tie back long hair before beginning
work and do not wear clothing that can
hang down into the engine .
- Limit your exposure to exhaust and chemi­
cals to as short a time as possible
c:> ,&. .
.&_ WARNING
California Proposition 65 Warning:
- Engine exhaust, some of its constituents,
and certain vehicle components contain or
emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and
reproductive harm. In addition, certain flu­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm .
- Battery posts, terminals and related acces­
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive harms .
Wash hands after handling.

Checking and Filling
have the cause of your concern properly di­
agnosed. Keep in mind that the accurate
measurement of oil consumption requires
great care and may take some time. Your
Audi dealer has instructions about how to
measure oil consumption accurately.
Checking the engine oil level
A pp lies to: ve hicles w ith oil leve l indicator
The engine oil level can be checked in the Info­
tainment system
Observe the safety precautions c:::> &. in Working
in the engine compartment on page 2 71.
.. Park your vehicle on a level surface.
.. Shut the engine off when it is warm .
.. Switch only the ignition back on.
.. Wait approximately two minutes.
.. Select: the
ICARI function button > Car systems
control button > Servicing & checks> Oil level.
.. Read the oil level in the display . Add engine oil
if the bar in the oil level indicator is just before
"min"
<=:> page 276.
The engine oil consumption may be up to
0.5 quart/600 miles (0.5 liter/1,000 km), de­
pending on driving style and operating condi­
tions. Consumption may be higher during the
first 3,000 miles (5,000 km). Because of this, the
engine oil level must be checked regularly. It
would be best to check each time you refuel your
vehicle and before long drives.
@ Tips
The oil level indicator in the display is only an
informational display. If the oil level is too
low, a minimum oil warning appears in the in­
strument cluster. Add oil and close the hood.
The current oil level is displayed in the Info­
tainment system the next time the ignition is
switched on .
276
· Adding engine oil~
Fig. 260 En gine compartment : engine oil f iller opening
cover
Read and follow the WARNINGS before check­
ing anything in the engine compartment
c:::> page 2 71 .
.. Turn the engine off .
.. Unscrew the engine oil filling opening cap
"I::?:
c:::> fig. 260, c:::> page 2 74.
.. Carefully add 0.5 quart (0.5 liter) of the correct
oil
c:::> page 2 74.
.. Check the oil level again after two minutes
c:::> page 2 76, Checking the engine oil level .
.. Add more oil if necessary.
.. Close the engine oil filler opening cap.
A WARNING
- When adding oil, do not let oil drip onto hot
engine components. This increases the risk
of afire.
- Always clean skin thoroughly if it comes into
contact with engine oil.
(D Note
- Check the oil level. If the message Please
reduce oil level
appears, contact an author­
ized Audi dealer or authorized Audi Service
Facility to have excess oil extracted if neces­
sary.
- Do not mix any additional lubricants into
the engine oil. Damage caused by such addi­
tives is not covered by the warranty.
(® For the sake of the environment
-Oil should never enter the sewer system or
come into contact with the ground.

C)
_& WARNING
-The cooling system is under pressure. Do
not open the coolant expansion tank cap
when the engine is hot. This increases the
risk of burns .
- The coolant add itive and the coolant can be
dangerous to your health. For this reason,
keep the coolant in the original container
and away from children. There is a risk of
poisoning.
- When working in the engine compartment,
remember that the radiator fan can sw itch
on even if the ignition is switched off, which
increases the risk of injury.
CD Note
Do not add coolant if the expansion tank is
empty. Air could enter the cooling system and
damage the engine. If this is the case, do not
continue driv ing. See an authorized Audi deal­
er or authorized Audi Service Facility for assis­
tance.
Brake fluid
N
N
-N
" co IXl
F ig. 262 Engine compartment: cap on brake fluid re servoir
Observe the safety precautions c:> &. in Working
in the engine compartment on page 2 71.
Checking the brake fluid level
" Read the brake fluid level on the brake fluid
reservoir
c:> page 2 74, fig. 259. The brake fluid
level must be between the MIN and MAX mark­
ings
c:> &_ .
~ The brake fluid level is mon itored automatically .
" N ...... 0 0 :r Checking and Filling
Changing the brake fluid
Have the brake fluid changed regularly by an au­
thorized Audi dealer or authorized Audi Service
Facility.
A WARNING
-
- If the brake fluid level is below the MIN
marking, it can impair the braking effect
and driving safety, which increase the risk of
an accident . Do not continue dr iving. See an
author ized Audi dealer or author ized Audi
Service Facility for assistance.
- If the brake fluid is old, bubbles may form
in the brake system dur ing heavy braking.
This would impair braking performance and
driving safety, which increases the r isk of an
accident.
- To ensure the brake system functions cor­
rectly, only use brake fluids that comply
with VW standard 50114 or FM VSS -116 DOT 4.
CD Note
-If the brake f luid level is above the MAX
marking, brake f luid may leak out over the
edge of the reservoir and result in damage
to the vehicle.
- Do not get any brake fluid on the vehicle
paint, because it wi ll corrode the paint.
Battery
General warnings about batteries
Because of the complex power supply, all wo rk
on batter ies such as disconnecting, replac ing,
etc. should
only be performed by an authorized
Audi dealer or authorized Audi Service Fac il ity
c:> & .
The term "vehicle battery" refers to the 12 Volt
battery in your vehicle.
Detailed warnings for the vehicle battery:
® Wear eye protection.
I.)._ Bat~ery acid is highly corrosiv~. Wear pro-
~ tect1ve gloves and eye protection. Ill-
279

Checking and Filling
@
Fire, sparks, open flame and smok ing are
forb idden.
~
A highly explosive mixture of gases can
form when charging batteries.
®
Keep c hildren away from bat tery acid and
batteries.
A WARNING
All work on the battery or electrica l system in
your vehicle can result in injuries, chemical
burns, accidents or burns. Because of this, a ll
work m ust be performed
only by an author­
ized Aud i dea le r o r autho rized Aud i Serv ice
Facili ty.
A WARNING
California Proposit io n 65 Warning:
- Battery posts, termina ls and re lated acces­
so ries contai n lead and lead compounds,
chemicals known to the Sta te of Californi a
to ca u se ca nce r and rep roduct ive p roblems.
Wash hands after handling.
0 Note
Protect the vehicle ba ttery against freezing if
t he vehicle will be p arked for long per iods of
time so th at it is not destroyed by "free zing"
c::>page 280.
@ For the sake of the environment
~ Batteries cont ain poll utin g substances suc h
as s ulfu ric ac id and lead. Contac t an a uthor­
ized Audi dealer or aut horized Audi Service
Facility for more information.
Vehicle battery
The term "vehicle battery" refers to the 12 Volt
battery in your vehicle.
Not running the vehicle for long periods of
time
If you do not drive your ve hicle for seve ral days or
weeks, e lec trical equipment is gradually scaled
back or switched off. This reduces energy use and
ensures the veh icle wi ll be able to start after long
periods of time
c::> page 130 . Some conven ience
280
funct ions, such as interior lighting o r power seat
adjustment, may not be avai lab le under certain
c ircumstances. These convenience functions will
be available again once you switch the ignition on
and start the eng ine.
Even when electrical equipment is switched off,
the eq uipment can st ill dra in the vehicle batte ry
if the veh icle is not dr iven for long pe riods of
time . Deep drai ning results in a chemica l reaction
that destroys t he ins ide of the vehicle battery .
The vehicle battery must be charged every mon th
to reduce the risk of this happening
c::> page 280 .
Contact an a uth o rized Aud i dea le r or a uth o rized
Audi Se rvice Fac ility for mo re informa tion.
Winter operat ion
Co ld weather places higher demands on the vehi ­
cle battery . T his res ults in reduced starting ab ili­
ty. Have the vehicle batte ry checked by an au­
thorized Audi dea le r or authori zed Audi Service
Fac ility befo re t he cold time of year.
Charging the vehicle battery
Fi g. 2 63 En g ine compa rt m ent: con nectors fo r a c ha rge r
and j ump start cab les
Requirement: only use chargers with a maximum
charging voltage of 30 amp s/14 .8 Volts .
The
vehicle battery cab les remain connected .
.. Read the warnings
c::> A in General warnings
about batteries on page 280
and c::> A .
.. Switch off the ign it ion and all electrica l equ ip­
ment.
.. Open the hood
c::> page 273.
.. Remove the cover© by pressing on the ar row
¢ fig . 263 .
" Open the cover @on the pos itive terminal. .,.

Checking and Filling
Service interval display
The service interval display detects when your ve­
hicle is due for service.
The service interval display works in two stages:
-Inspection or oil change reminder: after a cer-
tain distance driven, a message appears in the
instrument cluster display each time the igni ­
tion is switched on or off . The remaining dis­
tance or time is displayed briefly.
- Inspection or oil change due: if yo ur vehicle
has reached an inspection or oi l change interval
or both intervals at the same time, the mes­
sage
Inspection due! or Oil change due! or Oil
change and inspection due!
appears briefly af­
ter switching the ignition on/off .
Checking service intervals
You can check the remaining distance or time un­
til the next oil change or next inspection in the
Car menu. To do this, select : the
ICARI function
but ton
> Car systems control button > Servicing
& checks > Service intervals .
Resetting the indicator
Your authorized Audi dealer or authorized Audi
Serv ice Facility will reset the serv ice interval dis­
p lay after performing serv ice.
If you have changed the oil yourself, you must re­
set the oil change interva l.
To reset the indicator, select : the
ICARI function
button
> Car systems contro l button > Servicing
& checks > Service intervals. Turn the control
knob downward to
Reset oil change interval and
press the control knob.
([) Note
-Only reset the oil change indicator if the oil
was changed .
- Following the service intervals is critical to
maintain ing the service life and va lue of
your vehicle, especially the engine. Even if
the m ileage on the vehicle is low, do not ex­
ceed the time for the next service.
282

Wheels
the recommended tire pressure for your vehicle
¢page 293, fig. 268.
Tire tread circumference and vibration character­
istics can change and cause a tire pressure warn­
ing if:
- the tire pressure in one or more tires is too low.
- the tire has structural damage .
- the tire was replaced or the tire pressure was
changed and it was not stored¢
page 302.
-the spare tire* is installed.
Indicator lights
IE Loss of pressure in at least one tire¢&. .
Check the tires and replace or repair if necessary.
Check/correct the pressures of all four tires and
store the pressure again in the Infotainment sys­
tem ¢
page 302 .
mm (Tire Pressure Monitoring System) Tire
pressure: System malfunction!.
Ifmm appears
after switching the ignition on or while driving
and the
IE indicator light in the instrument clus­
ter blinks for approximately one minute and then
stays on , there is system malfunction . Try to
store the correct tire pressures¢
page 302. If
the indicator light does turn off or turns on again
after a short period of time, drive to an author­
ized Audi dealer or authorized Audi Service Facili­
ty immediately to have the malfunction correct­
ed .
A WARNING
- If the tire pressure indicator appears in the
display, reduce your speed immediately and
avoid any hard steer ing or braking maneu­
vers . Stop as soon as possible and check the
t ir es and their pressure .
- The driver is responsible for maintaining the
correct tire pressure. You must check the
t ire pressure regularly.
- Under certain conditions (such as a sporty
dr iv ing style, winter cond itions or unpaved
roads), the tire pressure monitoring system
indicator may be delayed.
- Do not use run-flat tires on your vehicle. Us­
ing them when not permitted can lead to
vehicle damage or accidents .
302
(D Tips
-The tire pressure monitoring system can al­
so stop working when there is an ESC mal­
function.
- Using snow chains may result in a system
malfunction.
- The tires with the identification "AO" or
"RO" ¢
page 290 have been matched with
your Audi tire pressure monitoring system.
We recommend that you use these tires.
Storing tire pressures
App lies to: AB, 58
If the tire pressure changes or a tire is replaced ,
it must be confirmed in the Infotainment sys­
tem.
... Make sure before storing that the tire pressur es
of all four tires meet the specified values and
are adapted to the load ¢
page 291.
... Switch the ignition on.
... Select: the
ICARI funct ion button> Car Systems
control button > Servicing & checks > Tire
pressure monitoring
> Store tire pressure >
Yes, store now.
(D Tips
Do not store the tire pressures if snow chains
are installed. Othe rw ise the system could
malfunction.
Tire Pressure Monitoring System (S8 plus)
(l) General notes
App lies to : 58 plus
Each tire, including the spare (if provided),
sho uld be checked monthly when cold and inflat­
ed to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or
tire inflation pressure label. (If your vehicle has
tires of a different size than the size indicated on
the vehicle placard or tire inflation pressure la­
bel, you should determ ine the proper t ire infla-
tion pressure for those tires). .,.

Wheels
@ For the sake of the environment
Low tire pressure inc reases fuel consumption
and tire wear.
@ Tips
- The pressure of the spare tire * is not moni ­
tored.
- If t ires are re pla ced, the sensors/valves do
not need to be removed or rep laced . Ju st re­
placed the valve stem and, if necessary, the
valve and the wheel e lectron ics . If you have
quest ions, see your autho riz ed Aud i dea ler
or authorized Audi Service Facility.
Displaying tire pressures/temperatures
App lies to : 58 plus
Req uirement: the ign ition must be switched on .
.,. Select : the
ICARI function button > C ar s ystems
> Serv icing & checks > Tire pressure mon itor ­
ing
> Display tire pressures.
The current tire pressures are shown in green and
yellow numbers in the Infotainment system:
- Green : the current tire pressure and the speci­
fied tire pressure are approximately the same .
-Yellow: the c urrent tire press ure is too low
compared to the specified tire pressure.
The spe cified t ire press ure is the la st tire pres­
sure th at was s tored
c::> page 305.
No te that the tire pressure also depends on the
t emperature of the ti re . The ti re pressu re in­
creases as the engine becomes wa rmer wh ile
d riving.
& WARNING
R ea d and follow t he important information
and notes
c::> page 303 .
@ Tips
The tire pressure or tem per ature are not dis­
pl ayed in ada ptation mode. D ashe s·-.·- are
shown i n place of the press ure and tempera ­
ture .
304
-
Tire pressure loss
Applies to: 58 plus
Fig. 2 70 Dis pla y: ind icator light w it h a mess age
If the [I] ind icator light turns on, the pressure in
at least one tire is too low or new sensors were
not adapted:
RE indicator light s turn s on after turning the
ignition on
The tire pressure is too low compared to the
spec ified press ure .
.. Check and store the tire press ure(s) the next
time it is possible
c::> page 305.
RE indicator light turns on while dr iving
Wheels with new sensors we re not adapted or
the tire p ressure has reached a critica l level com­
pared to the specif ied pressure.
.. Avoid unnecessary s teering and brak ing maneu-
vers .
.. Adapt your driving sty le to the s ituation.
.. Stop as soon as possib le and check the tire(s).
.. If it is possib le to cont inue dr iv ing, see an au-
thorized Audi dealer or authorized Audi Service
Facility immediately and have your tire(s) re ­
pai red or rep laced .
& WARNING
Read and f ollow the impo rtant inform ation
and notes
c::>p age 303.
-

Storing new tire pressures
Applies to: S8 plus
Correctly stored tire pressure specifications are
necessary for reliable tire pressure monitoring .
.. Check the tire pressures in all wheels.
1> If necessary, correct the tire pressure according
to the spec ificat ions on the sticker on the driv ­
er's door ~
page 291 . Only correct the press ure
in tires whose tempera tu re is approx imately
the same as the amb ient temperature.
If the
tempera ture of the tire is highe r than the ambi­
ent a ir temperat ure, the tire pressure must be
increased approximately 3 PSI (0,2 bar) above
the va lue on the sticker.
.. Switch the ignition on.
.. Se lect :
I CARI funct ion button > Car systems >
T ire pr essure monitoring > Store tire pres­
s ure s.
After stor ing, the tire pressure mon itor ­
ing system measures the c urrent tire pressures
and stores them as the new specified p res­
s ur es .
.. If the changed tire press ures are not displayed
in t he Infotainment system, dr ive the veh icle
for approximate ly 10 minutes so that the sen ­
sor signal from the whee ls is received again .
During this adap tat ion phase, --,-- is disp layed
for pressure and temperature and the Tire Pres ­
sure Monitoring System is only partially availa­
b le: it only warns you if one or more of the tire
pressures is/are under the m inimum permitted
va lue. If this is the case, the
It] indicator light
appears w ith a message .
A WARNING
Read and follow the important information
and notes
~ page 303.
Malfunctions
Applies to: S8 plus
-
I f t he Tire Pressu re Monito ring System is not
av ail able,
the m ind icator light appe ars in the
driver informat ion system. The
HJ] indi cator light
o a lso blinks for approx imately one m inutes each co
~ time the ignition is switched on . The tire pressure ,.....
~ monitoring system cannot be selected in the In-o 0 :c ' Wh eel s
fota inment system. The following are examp les
of situations that cou ld cause a malfunction:
- I f the message appears at t he e nd of the adap­
t ation phase, the system cannot detec t the
wheels installed on the veh icle. This may result
from one or more whee ls being installed with­
out wheel senso rs or with incompatible whee l
sensors.
- A wheel sensor or another component has
fa iled.
- Using snow chains can affect the function of
the system beca use of the shielding effect of
the chains .
- The tire pressure monitoring system is not
avai lab le due to a ma lf u nction .
- Transmitters with the same frequency, such as
headphones or remote-cont rolled devices, may
cause a temporary system malfunct ion due to
the strong electromagnetic field.
The
fim indicator light t urns off once the Tire
Pressure Monitoring System is availab le aga in . If
you cannot correct the ma lf u nction and
the m
indicator light stays on, drive immediately to an
authorized Aud i dealer or a uthorized Audi Serv ice
Facility to have the malf unct ion repaired .
305

0 co .... N ,..... N .... 0 0 :c ' & WARNING
-Only wash the vehicle when the ignition is
off and follow the instructions from the car
wash operator to reduce the risk of acci­
dents.
- To reduce the risk of cuts, protect yourself
from sharp metal components when wash­
ing the underbody or the inside of the wheel
housings.
-After washing the vehicle, the braking effect
may be delayed due to moisture on the
brake rotors or ice in the winter . This in­
creases the risk of an accident . The brakes
must be dried first with a few careful brake
applications.
(D Note
- If you wash the vehicle in an automatic car
wash, you must fold the exterior mirrors in
to reduce the risk of damage to the mirrors.
Power folding exterior mirrors* must only
be folded in and out using the power folding
function.
- To reduce the risk of paint damage, do not
wash the vehicle in direct sunlight.
-
Care and cleaning
-To reduce the risk of damage, do not wash
the power top with a pressure washer.
- To reduce the risk of damage to the surface,
do not use insect removing sponges, kitchen
sponges or similar items.
- Matte finish painted vehicle components:
- To reduce the risk of damage to the sur-
face, do not use polishing agents or hard
wax.
- Never use protective wax. It can destroy
the matte finish effect .
- Do not place any stickers or magnetic
signs on vehicle parts painted with matte
finish paint . The paint could be damaged
when the stickers or magnets are re­
moved.
@ For the sake of the environment
Only wash the vehicle in facilities specially de­
signed for that purpose . This will reduce the
risk of dirty water contaminated with oil from
entering the sewer system.
Cleaning and care information
When cleaning and caring for individual vehicle
components, refer to the following tables. The
information contained there is simply recom­
mendations. For questions or for components that are
not listed , consult an authorized Audi
dealer or authorized Audi Service Facility. Also
follow the information found in¢& .
Exterior cleaning
Component Situation Solution
Windshield wiper
Deposits ¢ page 51
blades
Headlights/
Deposits Soft sponge with
a mild soap solutiona)
Tail lights
Sensors/
Deposits Sensors: soft cloth with solvent-free cleaning solution
camera lenses Camera lenses: soft cloth with alcohol-free cleaning solu-
tion
Snow/ice Hand brush/solvent-free de-icing spray
Wheels Road salt Water
Brake dust Acid-free special cleaning solution
307

Fuses and bulbs
Fuses and bulbs
Electrical fuses
Changing fuses
A fuse that has blown will have metal strips that have burned through .
Fig. 28 5 Driver s ide of th e cockp it: fuse panel cover
I l I
F ig. 2 86 Lu ggage compartment: fuse pane l cover
The fuses are loca ted on front left and r ight of
the cockpit and behind the trim on the right side
of the luggage compartment.
.. Swi tch the ignition and all e lec trica l equipment
off.
.. Check the following table to see which fuse be­
lo ngs to the equipment .
.. Remove the cover
c::> fig. 285 or c:> fig . 286 .
.. Remove the colored plastic clip from the fuse
panel, if necessary
c:> page 323, fig. 287. You
can d ispose of the p lastic clip .
.. Remove the clamp from the rear s ide of the
cove r
c::> fig. 285 .
.. Remove the f use usi ng the clamp .
.. Replace the b low n fu se only wi th an identi cal
new one .
.. Install the cover.
322
Fuse color identification
Color Current rating
in amps
Black 1
Purple 3
Light brown 5
Brown 7.5
Red 10
Blue 15
Yellow 20
Wh ite or transpa re nt 25
Green 30
Orange 4 0
A WARNING
-
Do not repair fuses and never replace a blown
f u se with one that has a higher amp rat ing.
This ca n cause damage to t he e lectr ica l sys­
tem and a fire.
(D Note
If a new fuse burns out again sho rtly after you
h ave insta lled it, have the electrical system
checked as soon as possible by an authorized
A udi dealer or authorized Aud i Service Fac ili­
ty .
(D Tips
-The following table does not list fuse loca­
tions that are not used .
- Some of the equipment listed in the fo llow­
ing tables applies on ly to certai n model ver­
sions or certa in optional equipment .