2012 AUDI A8 battery replacement

Removing the mechanical key
Fig. 14 Remote control maste r key : re mov ing the me­
c han ical key
• Press the release button@ ¢ fig. 14.
• Pull the mechanica l key @ out of the mas ­
ter key.
Using the mechan ica l key, you can:
- lock and unlock* the storage compartment
on the passenger's side
<=:> page 71.
-lock and unlock the vehicle manually
c:>page 33 .
-lock the front and rear passenger doors me­
chanically
c:> page 34.
- unlock the rear lid manua lly ¢ page 37 .
Check light and battery in the master
key
Fig. 15 Remote master key : Re mov ing the battery
holder
Check light in the master key
The check light @<=:> fig. 15 in the master key
prov ides information about different cond i­
tions.
• The check light turns on brief ly once when a
button is pressed, and during an "inqu iry"
by the convenience key system .
Opening and closing 29
• If the check light does not come on, the
battery is dead and has to be replaced. In
add ition, when the battery is dead
the m
indicator light appears in the instrument
cluster display as well as the message
Please change the key battery .
Master key battery replacement
We recommend having the battery changed
by an authorized Audi dealer. However, if you
wish to replace the dead battery yourse lf , pro­
ceed as follows:
• Remove the mechanical key
c:> page 29.
.. Press the re lease button ® c:> fig. 15 on the
battery holder and at the same time pull the
battery holder out of the master key in the
direction of the arrow .
.. Install the new battery CR 2032 with the
"+" sign facing down.
• Push the battery holder carefu lly into the
master key.
• Install the mechan ical key.
(® For the sake of the environment
Dispose of dead batteries properly so as
not to poll ute the environment.
(D Tips
The replacement battery must be the
same specification as the original.
Electronic immobilizer
The immobilizer helps to prevent unauthor­
ized use of your vehicle .
A computer chip inside your key automatically
deact ivates the electronic immobilizer when
the key is inside the vehicle . When you remove
the key from the vehicle, the elect ronic immo ­
bilizer is automatically activated once again.
& WARNING
Always take the key with you when you
leave the vehicle. The key can disarm the
e lectronic engine immobilizer and permit
an unauthorized person to start the engine
and enable operation of the vehicle
IIJI,-

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 .

29 0 Index
Glove compartment (cooled) ... .. .... . . 71
Gross Veh icle Weight Rating (GVWR) ... 276
H
Headlights
Clean ing system ....... ..... .. .. .. .. 48
Defective . . . . . . . . . . . . . . . . . . . . . . . . . 21
H ead light range control . . . . . . . . . 21, 43
Washer reservoir .................. 234
Head restraints . . . . . . . . . . . . . . . . . 61, 128
Adjusting .. .......... .... .... .... 128
Heated exterior mirrors . . . . . . . . . . . . . . . . . . . . 51
rear window . . . . . . . . . . . . . . . . . . . . . . . 77
seats .. .. .... ........ ...... ... .. .. 77
windshield washer spray nozzles .. .... 48
Heating ..... ................ ..... .. 75
H eavy clothing and safety belts ... .. ... 137
High beam . .. ..................... .. 45
High voltage warning label ... ... .. ... 276
H omelink ® universal remote control . . . 121
Hood (release lever) ................. 219
H orn . .. .. .. .. . .......... .. .. .. .. .. . 8
How are child restraint system anchors re­
lated to child safety . . . . . . . . . . . . . . . . . 178
How many airbags does my vehicle have? 149
H ow often should I check my t ire pres-
sures? ............................ 242
H ow safety belt pretensioners work . ... 140
Hydroplaning . .. . ...... ... .. .. .... . 246
I
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . 25
Important things to do before driving . . 124
Improperly worn safety belts . .... .... . 140
I ndicator lights
refer to Warning/ind icator lights .... . . 11
Infant seats . ................ ... ... 171
Installing chi ld safety seats
Safety belts . . . . . . . . . . . . . . . . . . . . . . 17 5
I nstall ing the upper tether strap on the
anchorage ... ... .. ..... ... .. .. .... . 183
Instruments Ad justing the lighting . ........ ...... 47 Instruments and controls
Genera l illustration . . . . . . . . . . . . . . . . . . 8
Instrument cluster .......... ... .. .. . 10
Interior l ighting
Amb ience light ing ................. . 46
Front and rear ... ... .. ..... ... .. .. . 46
Intermittent (w indshield w ipers) ....... 48
J
Jack 257
Jump-starting ..... ... .. ..... ... .. .. 270
Jumper cables . .. .. .......... ...... . 271
K
Key ........... ... .. ................ 28
Battery replacement master key . . . . . . . 29
E mergency key . .. ............. .. .. . 28
K ey replacemen t . . . . . . . . . . . . . . . . . . . 28
Mas ter key . . . . . . . . . . . . . . . . . . . . . . . . 28
Mechan ica l key ... ... .. ..... .... . .. . 29
Valet key . . . . . . . . . . . . . . . . . . . . . . . . . . 28
K ick-down (automatic transmission) .... 112
Knee a irbags .... .. ... .......... .... 157
Description .... ................... 157
How they work . . . . . . . . . . . . . . . . . . . . 158
Important safety instructions .. .. .. .. 159
L
Lane assist
Activat ing and deactivating ........... 96
Description . . . . . . . . . . . . . . . . . . . . . . . . 96
Instrument cluster ind icator lig ht .. .. . 96
Kamerabereich rein igen ......... .... 205
Messages . ...... ............. .... . 97
Notes on instrument cluster disp lay ... . 96
Setting the steering wheel vibration ... . 98
Setting the warning point .... ... .. .. . 98
Lane Change Assistant
refer to side assist . . . . . . . . . . . . . . . . . . 99
LATCH .... ... .. .. .. ... ....... ... .. 178
Description .. .. ............ ....... 179
Gu idance fixtures for lower ancho rages 180
Installing a c hild restra int ........... 181
Loca tion . . . . . . . . . . . . . . . . . . . . . . . . . 179
Mounting and releasing the anchorage
hook ... .. .... .. .. ... .. ... ... .. .. 181