Keyless Entry Transmitter Battery: Service and Repair

Central Locking System

- Central locking system in the A4 operates electrically instead of pneumatically as before.

- Actuators in doors are integrated in the door lock and have 2 motors.

- Actuators cannot be replaced separately.

- The first motor locks the door and the second motor locks the interior door mechanism (Safe function).

- Now, doors also can no longer be opened from the interior.

- Actuators of fuel filler flap and rear lid have one motor each and cannot be replaced individually.

- After an accident in which the airbag deploys, the central locking system control module opens any doors which were locked.

- Central locking system control module is located in front of driver's seat, at left, under floor mat.