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How to Open the Key Fob for the Mercedes A-Class - B-Class

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

In this guide, you will find the main instructions to disassemble and open the key fob for the Mercedes A-Class, as well as the B-Class. First, take your key fob and remove the physical key from inside it. Then, pry on the sides of the fob to open it into two parts, accessing the circuit board and the battery, as shown in the video. At this point, replace the battery or the shell of the key; if necessary, transfer everything to the new casing, following the video to the end!

Updated on 4 July 2026 by ScegliAuto

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How to Connect the Cables to the Battery of the Citroen Xsara Picasso?

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