2018 AUDI A8 Owners Manual

lL t:0 ....
'"" ......
'"" .... 0 0 :c ' Tires with unidirectional tr ead design
Tires with unidirectional tread design must be
mounted with their tread pattern pointed in the
right direction .
Using a spare tire with a tread pattern
intended for use in a specific direction
When using a spare t ire with a tread pattern in­
tended fo r use in a specific direction, please note
the following:
- The direction of rotat ion is marked by an arrow
on the side of the tire .
- If the spare tire has to be installed in the incor­
rect direction, use the spare tire only tempora ­
rily s ince the tire will not be able to achieve its
opt imum performance character istics with re­
gard to aquaplaning, noise and wear .
- We recommend that you pay particular atten­
t ion to this fact during wet weather and that
you adjust your speed to match road condi­
tions.
- Replace the flat tire with a new one and have it
installed on your vehicle as soon as possible to
restore the handling advantages of a unidirec­
tiona l tire .
Notes on wheel changing
Please read the information ~ page 290 if you
are going to use a spare tire which is different
from the tires on your vehicle.
After you change a tire:
- Check the tire pressure on the spare immedi­
ately after installation.
- Have the wheel bolt tightening torque
checked with a torque wrench as soon as pos­
sible by your authorized Audi dealer or a
qualified service station.
- With steel and alloy wheel rims, the wheel
bolts are correctly tightened at a torque of 90
ft lb
(120 Nm).
- If you notice that the wheel bolts are corroded
and difficult to turn while changing a tire ,
they should be replaced before you check the
tightening torque .
Emergency assistance
-Replace the flat tire with a new one and have
it installed on your vehicle as soon as possi­
ble. Remount the wheel cover.
Until then , drive with extra care and at reduced
speeds.
A WARNING
- If you are going to equip your vehicle with
tires or rims which differ from those which
were factory installed, then be sure to read the information
Q page 290.
- Always make sure the damaged wheel or
even a flat tire and the jack and tool kit are
properly secured in the luggage compart­
ment and are not loose in the passenger
compartment.
- In an accident or sudde n maneuver they
could fly forward, injuri ng anyone in the ve­
h icle .
- Always store damaged wheel, jack and tools
securely in the luggage compartment. Oth­
erwise, in an accident or sudden maneuver
they could fly forward, causing injury to pas­
sengers in the vehicle.
Spare tires
General information
Applies to : vehicles wit h spare tire/space-saving spare tire
(com pact spa re tire)
Fig. 282 Lu ggage compar tmen t: ca rgo floor cover fo lded
upwa rd
The spare tire is intended for short-term use on-
-
ly. Have the damaged tire checked and, if neces­
sary, replaced by an authorized Audi dealer or au­
thorized Audi Serv ice Facility as soon as possible.
II>-
319

Emergency assistance
There are some restrictions on the use of the
spare tire. The spare tire has been designed spe­
cifically for your type of vehicle. Do not replace it
with the spare tire from another type of vehicle.
There are different types of spare tires available
depending on the equipment
c::> page 320.
Removing the spare tire
• Lift the cargo floor by the plast ic ha ndle
c::> fig. 282.
• Hook the hand le into the luggage compartment
weathe r strip.
• Turn the handwheel counter-clockwise and re-
move it.
• Remove the spare tire.
Snow chains
For technical reasons, the use of snow chains on
the compact spare tire is not permitted.
If you have to drive w ith snow chains and a front
tire fails , mount the spare t ire in place of a rear
tire . Install the snow chains on the rear tire that
you removed, and install that in place of the
front tire that failed.
A WARNING
-After installing a spare tire, the tire pres­ sure must be checked as quickly as possible.
- Do not drive faster than 50 mph (80 km/h)
with a compact spare tire. Driving faster
than that increases the risk of an accident.
- To reduce the risk of an accident, avoid full­
throttle acceleration, heavy braking, and
fast cornering with the compact spare t ire.
- To reduce the risk of an accident, never drive
with more than one compact spare tire.
- Norma l summer or winter tires must not be
mounted on the compact spare wheel rim.
A WARNING
- Never use the spare tire if it is damaged or if
it is worn down to the tread wear indicators.
- If the spare tire is more than 6 years old, use it only in an emergency and with ex­
treme caution and careful dr iving .
- The spare tire is intended only for tempora­
ry and short-term use.
It should be replaced
320
as soon as possible with the normal whee l
and tire.
- For technical reasons, the use of tire chains
on the spare tire is not permitted. If it is
necessary to drive with tire chains, the spare
wheel must be mounted on the front axle in
the event of a flat in a rear tire . The newly
ava ilable front wheel must then be installed
in place of the rear wheel w ith the flat tire.
Installing the tire chain before mounting
the wheel and tire is recommended.
- Loose items in the passenger compartment
can cause serious personal injury during
hard braking or in an accident. Never store
the inflatable spare tire or jack and tools in
the passenger compartment .
Spare tire types
Fig. 283 Luggage compartment: space -saving spa re t ire
(compact spare tire)
(D Spare tire*
If you have to mount a spare tire oppos ite the
running direction because of a flat tire , drive
ca refully and restore the correc t running direc­
tion as soon as possible
<=:>page 319.

u. co .... N
" N .... 0 0 :c ' @Space-saving spare tire (compact spare
tire )*
The ti re pressure must be 6 1 PSI (4.2 ba r).
Emergency assistance
321

Fuses and bulbs
Fuses and bulbs
Electrical fuses
Changing fuses
A fuse that has blown will have metal strips that have burned through .
Fig. 284 Driver side of the cockp it: fuse panel cover
1
•
Fig. 285 Luggage compartment: fuse panel cover
The fuses are located on front left and right of
the cockpit and behind the trim on the right side
of the luggage compartment.
.. Switch the ignition and all electrical equipment
off.
.. Check the following table to see which fuse be­
longs to the equipment .
.. Remove the cover c::> fig. 284 or c::> fig. 285 .
.. Remove the colored plastic clip from the fuse
panel, if necessary
<=:>page 323 , fig. 286. You
can dispose of the plastic clip .
.. Remove the clamp from the rear side of the
cover
c::> fig. 284 .
.. Remove the fuse using the clamp .
.. Replace the blown fuse only with an identical
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
White or transparent 25
Green 30
Orange 40
A WARNING
-
Do not repair fuses and never replace a blown
fuse with one that has a higher amp rating.
This can cause damage to the electrical sys­
tem and a fire.
(D Note
If a new fuse burns out again shortly after you
have installed it, have the electrical system
checked as soon as possible by an authorized
Audi dealer or authorized Audi Service Fac ili­
ty .
(!) Tips
-The following table does not list fuse loca­
tions that are not used .
- Some of the equipment listed in the follow­
ing tables applies only to certain model ver­
sions or certain optional equipment.

lL t:0 ....
'"" ......
'"" .... 0 0 :c ' Driver's side cockpit fuse assignment
Fig. 286 Drive r side cockpit: fuse panel with plastic bracket
Fuse panel @ (brown)
No. Equipment
1 Light switch
2 Eme rgency start coil (driver iden tification)
3 Left rear door control module
4 Head-up display
5 Horn
6 Interior lights (headliner)
Steering column lever, multifunction
8 steer ing whee l controls, steering wheel
heating
10 Powe r steering column adjustment
11 Driver door control module
12 Diagnostic con nector, light/rain sensor
14 Power steering column adjustment
lS Power steering, A/C compressor
16 Brake booster
Fuse panel © (black)
No. Equipment
1 Front seat heating
2 Windshield wipers
Fuses and bulbs
Fuse panel © (black)
3 Front exterior lighting
4 Sliding/tilting sunroof
5 Driver power window
6 Dr iver 's seat (pne umat ic)
7 Panorama glass roof
8 Dynamic steering
9 Front exterior lighting
10 Windshield/headlight washer system
11 Left rear power window
12 Panorama glass roof
Front passenger side cockpit fuse
assignment
Fig. 287 Fro nt passe nge r side cockp it: fuse panel with
plastic bracket
Fuse panel @ (black)
No. Equipment
1 Anti-theft alarm system
2 Transmission contro l module
3 Front climate control fan
4 Engine s upply
6 Engine control module
7 Front passenger door control module
323

Fuses and bulbs
Fuse panel@ (black ) Fuse panel@ (black)
8 Front passenger power window 11 Right rear power window
9 ESC con trol module 12 Front passenger's seat (pne umatic)
10 E
SC control module
Luggage compartment fuse assignment
F ig . 28 8 Luggage co mpar tment : fuse panel w it h plastic bracket
Fuse panel @ (black) Fuse panel@ (black)
No. Equipment
10 Rear seat heat
ing, refrigerator, rearv iew
1 ESC b
utton , data logger, d iagnost ic con -
nector, BCM - 1, adaptive lig ht mir
ror
1 1 Electromechanical steering
2 Network ing gateway 12 Selec tor lever, BCM-2 vol tage
3 Adaptive air suspension
13 Side assist
4 Park ing a id 14 E ngine contro l module
5 Steer
ing column lever
15 Starter
6 S usp ension contro l system senso r
7 Belt tensioners, airbag control mod ule 16
L
eft head light (he adlights w it h adap tive
li ght)/head light range co ntr ol
Heated w asher flu id no zz les, Home link
8 (garage doo r opener), night vision system
cont rol mod ule, sport differe ntia l, ionizer
9
Electromecha nica l par king brake cont rol
modu le
Fuse panel ® (red)
No . Equipment
1 Left reversible belt tensioner
2 R
ight revers ible belt tensioner
324

u. co .... N
" N .... 0 0 :c ' Fuse panel @ (red)
3
Starter diagnosis, DC/DC converter (with
Start/Stop system)
4 DC/DC converter (with Start/Stop system)
5 Image processing
6
Right headlight (headlights with adaptive
light)
7 ESC control module
8
Sound actuator, AEM control module/
crankcase housing heater
9 Adapt ive cru ise control
10 Transmission control module
11 Climate control system sensors
Fuse panel © (brown)
No. Equipment
1 Electromechan ica l park ing brake
2 Suspension control system sensor
3 Rear Infotainment system control panel
4 Smart module ( tan k)
5 Front climate control system controls
6 Rea r climate control system control panel
7 Networking gateway
8 Refrigerator
9 Special functions interface
10 Cell phone adapter, Bluetooth handset
11 AEM control module
12 Selector lever
1 3 Inte rior lighting
14 Rear exterior lighting
15 Fue l pump
16 Electromechanica l parking brake
Fuse panel @ (black)
No. Equipment
1
Luggage compa rtment lid movement-acti-
vated opening
2 Luggage compartment sockets
3 Rear socket
4 Fro nt cigarette lighter
5 Adaptive air su spension
6 115 V socket
Fuses and bulbs
Fuse panel @ (black)
7 Electromechanical parking brake
8 Rear seat heat ing
9 Rear exterior lighting
10 Rear climate control blower
Rear sunshade, closing a id, luggage com-
11 partment lid lock, convenience key, fue l
filler door
12 L uggage compartment lid control module
Fuse panel © (red)
No. Equipment
1 Rear seat adjustment buttons
3 Left rear seat (pne umatic)
5 Tra iler hitch control module
6 Left rea r seat
7 Right rear seat
8 Trailer hitch control module
9 Trailer hitch control module
10 Right rear seat (pneumat ic)
Fuse panel ® (brown)
No. Equipment
1
Start/Stop system , radio receiver/sound
amplifier
2 Sound amplifier
3
Start/Stop system, Rear Seat Entertain -
ment, radio receiver/sound amplifier
5
Automat ic dimming interior rea rview mir-
r or (for Start-Stop system)
6 DVD changer (glove compartment)
7 TV tuner
8 Infotainment system control panel/drives
9 Instrument cluster, analog clock
10 Infotainment system d isp lay
11 Radio receiver
12
Rearview camera, perip heral cameras
(parking system)
325

Fuses and bulb s
Bulbs
Replacing light bulbs
For your safety, we recommend that you have
your authorized Audi dealer replace burned out
bulbs for you .
It is becoming increasingly more and more diffi­
cult to replace vehicle light bulbs since in many
cases, other parts of the car must first be re­ moved before you are able to get to the bulb .
This applies espec ially to the light bulbs in the
front of your car wh ich you can only reach
through the engine compartment .
Sheet metal and bulb ho lders can have sharp
edges that can cause ser ious cuts, and parts
must be co rrectly taken apart and then p roperly
put back together to help prevent breakage of
parts and long term damage from water that can
enter housings that have not been properly re ­
sea led.
F or your safety, we recommend that you have
your authorized Audi dealer replace any bu lbs for
you, since your dealer has the proper tools, the correct bulbs and the expertise.
Ga s di sc ha rge la mp s (Xe non ligh ts):
Due to the high electrical voltage, have the bulbs
replaced by a qua lified techn ic ian . Head lights
with Xenon light can be identified by the high
voltage sticker.
LED headlights* requ ire no maintenance. P lease
contact your authorized Aud i dealer if a bulb
needs to be replaced.
A WARNING
Contact w it h high -vo ltage components of the
electrical system and improper rep lacement
of gas disc harge (Xenon) head light bu lbs can
cause serious personal injury and death.
- Xenon bulbs are pressurized and can ex ­
plode when being changed.
- Changing Xenon lamps requires the special
training, instructions and equipment.
- Only an a uthorized Audi dea ler or other
qualified workshop s hou ld change the bulbs
in gas disc harge lamps .
326
A WARNING
There are parts with sharp edges on the open­
ings and on the bulb holders that can cause
serious cuts .
- If you are uncertain about what to do, have
the work performed by an author ized Audi
dealer or other qual ified workshop . Ser ious
pe rsonal inju ry may resu lt from improperly
pe rformed wor k.
(D Tips
- If you must replace the light bulbs yourself,
always remember that the eng ine compart­
ment of any vehicle is a hazardo us a rea to
work in. Always read and heed all WARN­ INGS
~ page 272.
-It is best to ask you r author ized Audi dea le r
w henever you need to change a bulb.