| Servicing central locking system |
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| The central locking system in the Audi A4 operates electrically instead of pneumatically, as on previous models. |
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| The actuators in the doors are integrated in the lock and have 2 motors. |
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| The actuators cannot be renewed separately. |
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| The first motor locks the door, whereas the second motor locks the interior door handle (SAFE function). |
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| The locked doors can no longer be opened from inside the car. |
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| The actuators for the tank flap and rear lid have one electric motor each and can be renewed separately. |
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| After an accident involving activation of the airbags, the central locking control unit will unlock any doors which are locked. |
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| The central locking control unit is located in front of the driver's seat on the left side underneath the floor covering. |
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