A4 Quattro Cabriolet L4-2.0L Turbo (BWT) (2009)
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Keyless Entry Transmitter Battery: Service and Repair
Central Locking System
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Central locking system in the A4 operates electrically instead of pneumatically as before.
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Actuators in doors are integrated in the door lock and have 2 motors.
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Actuators cannot be replaced separately.
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The first motor locks the door and the second motor locks the interior door mechanism (Safe function).
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Now, doors also can no longer be opened from the interior.
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Actuators of fuel filler flap and rear lid have one motor each and cannot be replaced individually.
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After an accident in which the airbag deploys, the central locking system control module opens any doors which were locked.
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Central locking system control module is located in front of driver's seat, at left, under floor mat.
