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How to Replace the Key Battery in a Mercedes A-Class

Model: Mercedes Classe A W169 - Years 2004-2012
Part: Key

If pressing the buttons on the key fob does not unlock the doors, it is likely that the key battery is dead. Replacing it is very simple: first, pull out the mechanical key from the back of the fob and use it to pry open the designated slot to detach and remove the back cover of the key fob. Once this cover is removed, you can easily access the battery compartment and replace the battery with a new one, ensuring that you orient the battery correctly and use the same model.

Updated on 22 February 2026 by ScegliAuto

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How to Open a Stuck Boot on the Peugeot 407?

On the Peugeot 407, the boot may become stuck, possibly due to a problem with the control button or the lock actuator. In such cases, you can perform an emergency opening by following the simple procedure shown in this tutorial. First, open the rear doors, then lower the seat back by operating the release lever. Next, go inside the boot, locate the lock, and manually operate it using a flathead screwdriver. The boot will then be free to open.

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