2012 AUDI A8 light

Have the battery checked when you take your
vehicle in for service. Yo u are well advised to
replace a battery that is older than 5 years .
W ith certa in types o f airbag deployment, the
battery is disconnec ted from the vehicle elec ­
trica l system for safety reasons
c::> &. in Re­
pair, care and disposal of the airbags on
page 156.
Disconn ecting the battery terminal s
Some vehicle functions (power w indow regu­
l ators, for example) are lost if the battery ter­
minals are disconnected . These functions have
to be re learned after the battery terminals are
connec ted again. To prevent this, the battery
should only be disconnected from the vehicle
e lectrical system when absolutely necessary
for repairs .
Vehicles not driven for long period s
If you do not drive your vehicle over a period
of several days or weeks, electrical compo­
nents are gradually cu t back or switched off .
This reduces energy consumption and main ­
tains starting capability over a longer per iod
c::> page 192. Some of the convenience func­
tions may not operate, s uch as the inte rior
lights o r the power sea t adjustment . T he con­
ve nience fun ct ions wi ll be available again
when yo u switch on the ignition and start the
engine.
Winter operation
During the winter mont hs, ba ttery capaci ty
t ends to decrease as tempe rat ures d rop . Th is
is because more powe r is also consumed while
starting , and the headlights, rear window de ­
fogger, etc., are used more oft en.
Avoid unnecessary power cons umption, par­
ticularly in c ity t ra ff ic or when t raveling on ly
short distances. Let your a uthorized Audi
dealer check the capac ity of the vehicle bat ­
tery before winter sets inc::>
page 233. A well
charged battery w ill not only prevent starting
problems whe n the weather is cold, but will
also last longer .
Checkin g and fillin g 231
(D Tips
If your vehicle is left standing for seve ral
weeks at extremely low temperatures, the
vehicle battery shou ld be removed and
stored where it w ill not freeze. This will
prevent it from be ing damaged and having
to be replaced .
Working on the battery
Be especially careful when working on or near
the battery.
The battery is located in the l uggage compart­
ment under the floor. Before you check any­
th ing in the luggage compartment,
read and
h eed all WARNINGS
c::> &_ .
Always heed the safety warnings , when work­
ing on the vehicle battery or the vehicle e lec­
trical system to prevent injury.
The following WARNINGS are very
important when working on the battery:
Al ways heed the follo wing WARNING SYM­
BOLS and safety precautions when working on the battery.
@
®
Always wear eye protection.
Battery acid contains sulfuric acid.
Always w ear glove s and eye prot ec­
tion .
No
- sparks
-flames
- smoking .
When a battery i s charged, it produ­
ce s hydrogen gas wh ich i s ex plosive
and could cause per sonal injury .
Always keep the battery well out of ]
reach of children .
_& WARNING ~
Whenever working on the battery o r on
the electrical system, there is the risk of injury, accident and even fire . Read and
heed the following WARNINGS:
•
•

232 Checking and filling
-Always wear eye protection. Do not let
battery acid or any lead particles get on
your skin or clothing . Shield your eyes .
Explosive gases can cause blindness or
other injury .
- Battery acid contains sulfuric acid . Sulfu­
ric acid can cause blindness and severe
burns .
- Always wear gloves and eye protection.
Do not tilt the battery because acid
could leak out of the ventilation open­
ings.
- If you get battery acid in your eyes or
on your skin, immediately rinse with
cold water for several minutes and get
medical attention .
- If you should ingest any battery acid,
seek medical attention immediately.
- Do not expose the battery to an open
flame, electric sparks or an open light.
- Do not smoke.
- Do not interchange the positive and neg-
ative cables.
= When working on the battery , be sure
not to short-circuit the terminals with
tools or other metal objects. This would cause the battery to heat up very quickly,
which could lead to damage or explosion
and personal injury.
- When a battery is charged, it produces hydrogen gas which is explosive and
could cause personal injury .
- Always keep the battery well out of the
reach of children .
- Before work is done on the electrical sys­ tem, disconnect the negative ground ca­ble.
- Before performing any work on the elec­
trical system, switch
off the engine and
ignition as well as any electrical equip ­
ment . The negative cable on the battery
must be disconnected . If you are just go­
ing to replace a light bulb, then it is
enough to switch
off the lights.
- Before disconnecting the battery, switch
off the anti-theft alarm system! Other­
wise you will set off the alarm. -
When disconnecting the battery, first
disconnect the negative cable and then
the positive cable.
- Before reconnecting the battery, make
sure all electrical consumers are switch­
ed off. Reconnect the positive cable first
and then the negative cable . Never inter ­
change the cables - this could start a fire!
- Never charge a frozen or a thawed-out
battery .
It could explode! If a battery has
frozen, then it must be replaced . A dis­
charged battery can freeze over at 32 °F
(0 °C) .
-Make sure the vent hose is always attach­
ed to the opening on the side of the bat­
tery .
- Never use batteries which are damaged.
There is the danger of an explosion! Al­
ways replace a damaged battery.
A WARNING
California Proposition 6S Warning:
- Battery posts, terminals and related ac­
cessories contain lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive problems. Wash hands after han­
dling.
(D Note
- Do not disconnect the vehicle battery
when the ignition is on or when the en­ gine is running, otherwise, you will dam­
age electronic components in the electri­
cal system.
- If your vehicle is going to stand for a
long period of time without being driven,
protect the battery from "freezing", oth­
erwise it will be damaged and will then
have to be replaced .

234 Check ing and filling
Never use a fast charger as a booster to
start the engine. This will seriously dam­
age sensitive electronic components, such
as control units, relays, rad io, etc ., as well
as the battery charger.
Battery replacement
The new bat tery must have the same specifi­
cations and dimensions as the original equip­
ment battery .
Intelligent energy man agement in your veh i­
cle is respons ible for d istributing the electr i­
cal energy throughout your vehicle
c::> page 192. The intell igent energy manage­
ment system w ill keep the engine battery
cha rged bette r than vehicles w ithout t his sys­
tem. To make sure the additional e lectrica l en­
e rgy is availab le once again after you have
changed the battery, we recommend that you install batteries of the same type and manu ­
facture only (the same as those installed at
the time your vehicle was delivered). Specifi­
cations are listed on the battery hous ing. Your
author ized dealer must code the battery in
the energy management system to enable you
to use the energy management funct ions cor­
rectly after replac ing the battery .
The new battery must have the same capacity ,
voltage (12 volts), amperage, construct ion
and plug sealing.
When installing the ba ttery, make sure the ig­
n ition and all e lectr ica l consumers are sw itch ­
ed off .
{[) Note
Make sure the venti lation hose on the s ide
of the battery is connected, otherwise
fumes or battery ac id can leak out .
@ For the sake of the environment
Because of the problem of proper d isposa l
of a battery, we recommend your author ­
ized Aud i dealer change the battery for
you . Batter ies contain su lfuric ac id and l
ead and must a lways be disposed o f prop­
erly in compliance with a ll environmental
regulations. Disposing of vehicle batter ies
i mproperly is very dangerous to the envi­
ronment .
Windshield/headlight
washer container
Fig . 1 82 Eng in e compar tmen t: cov er on the w inds hield
washe r flu id rese rvoir
T he washer fluid co nta iner is marked w ith the
symbol~ on its cap
c::> fig. 182, c::>page 221.
.. Before you check anything in the engine
compartment, always read and heed all
WARNINGS c::> _& in Working in the engine
compartment on page 219.
.,. Lift the fil le r cap tongue to add washer flu­
id. You can fi ll the container to the top.
.. Press the cap back onto the fi ller neck after
fi lling the container .
You can find the reservo ir
ca pacit y in the table
in
c::> pag e 278 .
Clean water should be used when filling up. If
poss ible, use soft water to prevent scaling on
washe r jets . Always add a g lass cle aner solu­
tion (with frost protection in the winter).
(D Note
Do not mix engine coolant a ntifreeze or
any other addi tives to fill up the wind­
shield washer reservoir .

Tires and wheels 239
Cold tire inflation pressure
Tire pressure affects the overall handling, performance and safety of a vehicle .
Fig . 183 Tir e pr essur e labe l: located on drive r's s ide B ·
p ill ar
Tire pressu re genera lly refers to the amount
of air in a t ire tha t it needs it to do its job and
safely carry the combined load of the entire
vehicle and its contents . Tire pressure is
measured in kilopasca ls (kPa), the i nterna­
tional measuring unit and in pounds pe r
square inc h (PSI). Tire pressure is based in
pa rt o n the vehicle's desig n an d load limit­
the greatest amount of weight that the vehi­
cle can carry safe ly and the ti re size . The prop ­
er tire pressure is freq uent ly referred to as the
"recommended cold tire inf lation pressure ."
Air in the tires expands when the tire heats up
because of interna l frict io n when it flexes in
use . The ti re p ressu re is higher when the tire
has warmed up than when it is "cold ." It is the
i nflat io n pressure i n a "cold" tire that counts.
Therefo re, you s ho ul d never let air ou t of a
warm tire to match " cold tire infla tion p res­
sure" recommendations . The tires wo uld then
be underinf lated a nd could fail suddenly.
M ain taining proper t ire press ure is one of the
most impor tan t thi ngs you c an do to he lp
avoid sudden tire failure. Underinfla ted tires
are a major cause of s udden tire failure . Keep­
ing tires at the r ight pressure is also impor­
tant for safe and responsive vehicle handling,
traction, b rak ing and load carrying .
Tire pres­
sures are part icularly important wh en th e
vehicle is being driven at higher speeds , and
then especially when h eavily loaded even
within the permi ssible load -carrying capaci­
tie s approved for your vehi cle.
~
"' ~
,.------------------- ~
•(=~: I := I ~ I )§ :ll
,.,,. ........................ ...., .... ~----.... _ ... t.._.. .... _..,.. .... ......,... .. ~--......... ·- ..
-KPA. . PSI
- KPA. . PSI
- KPA. . PSI
Fig. 1 84 Tir e pressu re labe l
The recommended tire pressures for your Audi
depe nd on the kind of tires on your ve hicle
and t he number of passe ngers and/or amount
of luggage you w ill be t ransporting .
The tire pressure label is located on the driv­
er's side 8-pillar . The tire pressure labe l lists
the recommended cold t ire inflat io n pressures
for the veh icle at its maximum capac ity
weight and tires that we re o n your veh icle at
t h e time it was manufactu red.
If you wish to improve comfort when op erat­
ing the ve hicle at normal load (up to 2* /3
occupant s), you can adju st tire pres sures to
those specified for normal vehicle lo ad. Be­
fore operating the vehicle at maximum load ,
you must increase the tire pre ssure s to tho se
speci fied for maximum vehicle load
¢ .&.
Bear in mind that the tire pressure mon itor ing
system* can on ly mon itor the tire p ress ures
yo u have sto red. The sys tem does not recog ­
nize the load condition of your veh icle.
T he effectiveness of the t ire p ress ure monitor­
ing system * w ill be impa ired i f you s to re no r­
m al load pressures but t hen opera te the veh i­
cle a t its maximum load
¢ .& .
See the ill ustration 9 fig. 183 fo r the lo cat ion
of the label o n driver's s ide B-pillar (color of
the actu al label a nd exact lo cat ion on the ve­
hicle will vary s light ly).
Note t hat the follow ing table is accu rate at
the time of going to press and is s ubject to

254 Tires and wheels
remain continuously illuminated. This se­
quence will continue upon subsequent vehicle
start-ups as long as the malfunction exists.
When the malfunction indicator is illuminat­
ed, the system may not be able to detect or
signal low tire pressure as intended. TPMS
malfunctions may occur for a variety of rea­
sons, including the installation of replace­
ment or alternate tires or wheels on the vehi­
cle that prevent the TPMS from functioning
properly. Always check the TPMS malfunction
tellta le after replacing one or more tires or
wheels on your veh icle to ensure that the re­
placement or alternate tires and wheels allow
the TPMS to continue to function properly.
Tire pressure indicator appears
Appl ies to vehicles: with tire pressure monitoring sys te m
The tire pressure indicator in the instrument
cluster informs you if the tire pressure is too
low or if there is a system malfunction.
Fig. 188 Display: underinflation warning
Fig. 189 Display: System malfu nction
Using the ABS sensors, the tire pressure moni­
toring system compares the tire tread circum­
ference and vibration characteristics of the in­
dividual tires. If the pressure decreases in one
or more tires, this is indicated in the instru- ment
cluster with a warning symbol
[I] and a
message
r=> fig. 188.
The tire pressure monitoring system must be
reset via MMI each time the pressures are ad­
justed (e.g. when switching between partial
and full load pressure) or after changing or re­
plac ing a tire on your vehicle
r=> page 255. You
can find the recommended tire pressures for
your vehicle on the Label on driver's side 8-pil­ lar
¢ page 239.
Tire tread circumference and vibration charac­
teristics can change and cause a tire pressure
warning if:
- the tire pressure in one or more tires is too
low,
- the tire has structural damage,
- the tire pressure was changed, wheels rotat -
ed or replaced but the TPMS was not reset
r=> page 255.
Warning symbols
[I] Loss of pressu re in at least one tir e ¢ ,&. .
Check the tire or tires and replace or repa ir if
necessary. The indicator light
[I] in the instru­
ment cluster also illuminates
¢page 11 .
Check/correct the pressures of all four tires
and reset TPMS via MMI.
IIQllfl (Tir e Pressure Monitoring System) Tire
pressure! System malfunction .
If IIQIS, appears after switching the ignition
on or while driving¢
fig. 189 and the indica­
tor light
[I] in the instrument cluster blinks
f or approximately one minute and then stays
on, there is a system malfunction . See your
authorized Audi dealer as soon as possible.
A WARNING
-- If the tire pressure indicator appears in
the instrument cluster display, one or more of your tires is significant ly under­
inflated. Reduce you r speed immediately
and avoid any hard steering or braking
maneuvers. Stop as soon as possible and
check the tires and their pressures. In­
flate the tire pressure to the proper pres-
sure as indicated on the vehicle's tire .,..

CD Note
Do not lift the vehicle by the sill. Position
the vehicle jack only at the designated lift­ ing points on the sill. Otherwise, your vehi­
cle will be damaged.
(D Tips
The vehicle jack mode switches off auto ­
matically at speeds above 10 km/h.
Taking the wheel off/installing the spare
Follow these instructions step-by-step for
changing the wheel.
Fig . 201 Chang ing a whee l: using the screwdrive r han ­
dle (with the blade removed) to turn the bolts
Fi g. 202 Ch anging a wheel: alignment pin inside the
top hole
After you have loosened all wheel bolts and
raised the veh icle off the ground, remove and
replace the wheel as follows:
Re moving th e wh eel
.. Use the hex agon al so cket i n the s cre wdr iv ­
e r handle
to completely remove the top­
most wheel bolt and set it aside on a
clean
surface ¢fig. 201.
What do I d o now ? 263
.. Sc rew the threaded end o f the alignment
pin
from the tool kit hand-tight into the
empty bolt hole¢
fig. 202 .
.. Then remove the other wheel bolts as de­
scribed above.
.. Take off the wheel leaving the alignment
pin in the bolt hole
¢ (D .
Putting o n the spare w heel
.. Lift the spare wheel and carefully slide it
over the alignment p in to guide it in place
¢(]) .
.. Use the hexagonal socket in the screwdriver
handle to screw in and tighten all wheel
bolts
slightly.
.,. Remove the a lignment pin and insert and
tighten the rema ining wheel bolt slightly
like the rest .
.. Turn the jack hand le counter-clockwise to
lower the vehicle until the jack is fully re ­
leased .
.. Use the wheel bolt wrench to tighten all
wheel bolts firmly¢
page 261. Tighten
them
crosswise, from one bolt to the (ap­
proximately) opposite one, to keep the
wheel cente red.
CD Note
When removing or installing the wheel,
the r im cou ld hit the b rake rotor and dam­
age the rotor. Wor k carefully and have a
second pe rson help you.
@ Tips
Neve r use the hexagonal socket in the han­
dle of the screwdr iver to loosen or tighten
the wheel bo lts.
- Pull the reversible blade from the screw­
dr iver before you use the hexagonal
socke t in the hand le to turn the wheel
bolts.
- Whe n mount ing tires w ith
unidire ctional
t read de sign
make sure the tread pat ­
tern is pointed the right way
¢page 264.
- The wheel bo lts s hou ld be clean and ea sy
to turn . Check for dirt and corrosion on
the mating surfaces of both the wheel

266 Fuses and bulbs
Fuse panel @ (brown)
No. Equipment
1 Headlight control switch
2 Emergency start coil (key
identification)
3 Rear door
control module
(driver's side)
5 Horn
6 Interior lights
(headliner)
Steering column lever, mul-
8
tifunction steering wheel
controls, steering wheel
I heating
10 Power steering column ad-
justment
11 Driver door control module
12 Diagnost
ic connector, light/
rain sensor
14 Power steering column ad-
justment
15 Power
steering, AC compres-
sor
16 Brake booster
Fuse panel © (black)
No. Equipment
1 Front seat heating
2 Windshield wiper
3 Front exterior lighting
4 Sun roof
5 Driver power window
6 Driver seat (pneumatic)
7 Panoramic
sunroof
8 Dynamic steering
9 Front exterior lighting
10 Windshield/headlight
wash-
er system
11 Rear power window (driver's
side)
Panoramic sunroof
Amps
5
5
7,5 15
7,5
10/5
5
7,5 10
25
20 15
Amps
30
30
30 20
30 15
20
35
30
35
30
40
Front passenger side cockpit fuse
assignment
Fig. 206 Front passe nger side cockpit: fuse pane l with
plastic bracket
Fuse panel ® (black)
No. Equipment Amps
1 Anti-theft alarm system
5
2 T
ransmission control mod-
15
ule
3 Front climate control fan 40
4 Engine supply 35
6 Engine
control module
5
7 Front passenger door con-
7,5
trol module
8 Front passenger
power win-
30
dow
9 ESC control module 10
10 E5C control modu le 25
11 Right rear power window
30
12 Front
passenger seat (pneu -
15
matics)

Fuse s and bulb s 267
Luggage compartment fuse assignment
Fig. 207 Luggage compartment: fuse pa nel with plastic bracket
Fuse panel @ (black ) Fuse panel @ (b la ck)
No . Equi pment Amps No. Equipment Amps
[ru button, data logger, diag-
11 Dynamic
steering
5
l nostic connector, BCM -1,
5
Selector lever, BCM-2 5
adaptive light ing system
Audi side assist
5
2 Networking gateway 5
Engine control module 5
3 adaptive air suspension
5
Starter 40
4 Parking system 5
Left headlight/Headlight
16 10/5
5 Steer
ing column lever
5
range control system
Suspension control system
6 5 Fuse panel @ (red ) sensor
Belt tensioners, airbag con-
No. Equipment Amps
7
trol module 5 1 Left
reversible be lt tens ione r
25
Heated washer fluid nozzles, 2 Right reversible belt ten-
25
Homelink (garage door sioner
8 opener), night vision system
5 3 Starter diagnosis 5
control module, sport differ- 4 DC/DC converter
7,5
ential, ioni zer
5 Adaptive cruise contro l 7,5
9
Electromechan ica l parking
5 Right headlight (headlight
brake contro l modu le
6 with adaptive light) 10 -
10 Rear seat heating, cooler, in-
5 7 ESC co ntrol modu le 5 ... terior rearview mirror