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How to Reprogram the Remote Key for the Mercedes A-Class

Model: Mercedes Classe A W168 - Years 1997-2004
Part: Key

If the remote key has lost its codes and can no longer open and close the vehicle, you can reprogram it by following the procedure below: enter the cabin and sit in the driver's seat, insert the key into the ignition switch and start the engine. Locate the buttons on the key for opening and closing the doors, and press them in sequence (first the unlock button and then the lock button) at least five times. At that point, the key will be reprogrammed, and you can turn off the engine. Finally, remove the key and exit the cabin to test its functionality.

Updated on 24 June 2026 by ScegliAuto

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