change key battery AUDI A4 AVANT 2008 Owners Manual

Opening and clo sing
Master key battery replacement
Each master key contains a battery housed under the
cover.
F ig. 48 Mas ter key:
o p enin g the cover
We recommend having the battery changed by an autho­
rized dealership. However, if you wish to replace the dead
battery yourself, proceed as follows:
- Pry apart the
base~ fig. 48 @ and the cover ® car efully
with a coin .
- Remove the cover (arrow).
- Remove the dead battery from the cover .
- Install the new battery. Please make certain t hat the"+"
sign on the battery faces down . Correct polarity is shown
on the cover.
- Place the cover w ith the new battery on the key base and
press both parts together.
ffi For the sake of the environment
Dispose of dead batteries properly so as not to pollute the environ­
ment .
[ i ] Tip s
The replacement battery must be the same specification as the
original. •
Electronic immobilizer
The immobilizer prevents y our vehicle from being started
b y u nau thor ized pers ons.
Inside the key head there is a computer ch ip. Th is ch ip automatically
deactivates the e lectronic immobilizer when you insert the key in
the ignit ion lock. When you remove the key from t he ignition lock,
the electron ic immobili zer is automatical ly activated once again .
[ i ] Tips
• Your engine can only be started using the factory -equipped key
=> page 16.
• You may not be able to start your vehicle if an ignition key of a
different vehicle make is also located on your set of keys. •

Openin g and closing
Anti-theft alarm system
Description
The anti-theft alarm triggers an alarm if anyone attempts
to break int o the vehicle.
The anti-theft alarm system triggers an audible alarm and turns on
t he emergency flasher if an unauthorized interference with the
vehic le is sensed by the system .
How is the anti-theft al arm sy stem swit ched on ?
The anti -theft alarm system is switched on when you lock the
dr iver's door manually using your key, o r w hen you use the remote
control. The system is activated approximate ly 30 seconds after the
vehic le is locked. T he indicator light on top of the door trim s tart
flashing rapidly for 30 seconds and then b link slowly.
How is th e anti -theft alarm system switched off ?
The anti-theft alarm system is switched off only when you use the
r emote contro l to unlock your vehicle. If you do not open a doo r
within 60 seconds after you have un locked with the remote control,
the vehicle wi ll loc k itse lf aga in automat ical ly .
If you lock just the driver's door using your key , the front
passenger 's door, the rear and the fue l filler flap remain locked.
I f you use the veh icle key to unlock the driver's door, the other
doors , the rear lid and the fuel tank flap will remain locked . The
a lar m system wil l not be deactivated u nless you insert the key in the
ignition switch within 15 seconds and turn on the ignition . If you fail
to do this, the alarm wi ll sound.
Wh en w ill t he anti th eft ala rm sys tem b e trigg ere d?
When the vehicle is locked, the ala rm system monitors and pr otects
the fo llowing parts of the vehic le:
• engine compartment
• luggage compartment •
doors
• veh ic le incline
• ignition
• factory installed radio .
When the system is activated , the alarm will be triggered if one of
the doors, the engine hood or the rear lid are opened, or if the igni ­
tion is turned on or the radio removed or if the vehicle incline has
been changed .
The anti -theft alarm system wi ll also go off when you unlock the rear
lid with yo ur key and open it. The alarm is switched off again when
you c lose the rear lid .
The anti -theft alarm system wil l also go off when the battery is
disconnected.
You can also trigger the alarm by pressing the PANIC button on your remote c ontro l. This wil l a lert other people in case of emergency.
Press the
PANI C button again to turn off the a larm .
How i s the anti-theft alarm switched off when
trigg ere d ?
The ala rm system is switched off when you un lock the veh ic le using
the remote contro l or when the ignition is switched on . The a larm
wi ll also switch itse lf off when it co mes to the end of its cyc le .
Em ergen cy flash er
The emergency flasher wil l b link briefly when the doors, engine
hood and rear lid are properly closed .
I f the emergency flashers do not blink, check the doors, engine hood
and rear l id to make sure t hey are proper ly c losed . If you close a
door, the hood or the rear lid with the anti -theft a larm switched on,
the emergency flas hers wil l b link only after you have closed the
door or lid .
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