change key battery AUDI A4 CABRIOLET 2009 Owners Manual

Master key battery replacement
Each master key contains a battery housed under the
cover.
Fig. 39 Master key:
opening 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. 39
@ and the cover @carefully
with a coin.
- Remove the cover (arrow).
- Remove the dead battery from the cover.
- Install the new battery. Please make certain that the"+"
sign on the battery faces down. Correct polarity is shown
on the cover.
- Place the cover with the new battery on the key base and
press both parts together.
W For the sake of the environment
Dispose of dead batteries properly so as not to pollute the environ ­
ment.
Contro ls and eq uip­
ment
Opening and closing
[ i] Tips
The replacement battery must be the same specification as the
original. •
Electronic immobilizer
The immobilizer helps to prevent unauthorized use of
your vehicle.
A computer chip inside your key automatically deactivates the elec­
tronic immobilizer when you insert the key in the ignition lock.
When you remove the key from the ignition lock, the electronic
immobilizer is automatically activated once again.
If an unauthorized key was used,
SAFE is displayed continuously in
the odometer display field.
in. WARNING
Always take the key with you when you leave the vehicle. The key
can disarm the electronic engine immobilizer and permit an unau­
thorized person to start the engine and enable operation of the
vehicle systems such as power window or power top leading to
serious personal injury.
[ i] Tips
• Your engine can only be started using the factory -equipped key.
• 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.
• For Declaration of Compliance to United States FCC and Industry
Canada regulations
~ page 320. •
~ehicle care irechnical data

To unlock r ear lid
- Pu ll the switch c:::::5 ~ page 56, fig. 48 in the driver's door.
To open re ar lid
- Raise the rear lid.
The remote rear lid re lease is deactivated automatically if you lock
the rear lid using the key . This enables the driver to lock the luggage
compartment permanently with the key and prevent unwanted
access to the trunk .•
Anti-theft alarm system
Description
The anti-theft alarm triggers an alarm if anyone attempts
to break into the vehicle.
The anti -theft a larm system triggers an audible alarm and turns on
the emergency flasher if an unauthorized interference with the
veh ic le is sensed by the system.
How i s the anti -theft alarm syste m switched on ?
The anti-theft alarm system is switched on when you lock the
driver's door manually using your key, o r when you use the remote
control. The system is activated approx imately 30 seconds after the
vehic le is locked. The indicator light on top of the door trim start
fl ashing rapid ly for 30 seconds and then b link slowly.
How i s the anti -theft al arm syst em switch ed off ?
The anti-theft alarm system is switched off only when you use the
remote contro l to unlock your vehicle . If you do not open a door
with in 60 seconds after you have unlocked with the remote control,
the vehic le will lock itself again automatica lly.
Controls and equip ­
ment
Op ening and clo sing
If you lock just the driver's door using your key, the front
passenger's door, the rear and the fuel f iller flap remain locked.
If you use the vehicle key to unlock the driver's door, the other
doors, the rear lid and the fuel tank flap will remain locked . The
a larm system will not be deactivated unless you insert the key in the
ignition switch within 15 seconds and turn on the ignition. If you fai l
to do this, the a lar m wi ll sound.
When will the anti theft alarm system be triggered?
When the vehic le is locked, the a larm system monitors and protects
the following parts of the vehic le:
• engine compar tment
• luggage compartment
• doors
• vehic 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 ant i-theft alarm system will also go off when you unlock the rear
lid with your key and open it. The alarm is switched off again when
you close the rear lid.
The anti-theft alarm system will also go off when the battery is d isconnected.
You can also trigge r the alarm by pressing the PANIC button on your
remote control. This will alert other people in case of emergency.
Press the
PANI C button again to turn off the a larm. .,_