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

Model: Mercedes Classe A W169 - Years: 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
Part: Key

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Video tutorial

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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    • Classe A 2012-2018 - Why is my Mercedes A-Class W176 key not recognized? Read answer

How to reset the Service light on a 2019 Jeep Renegade?

The Service light, depicted as a yellow spanner, illuminates as scheduled to remind the driver that it is time for scheduled maintenance. This means that the set mileage has been reached, or the expected time has passed. The procedure involves turning on the instrument cluster, pressing the accelerator three times, and then turning off the ignition. After this, keep the brake pressed, turn the ignition back on, and then turn it off again. Upon the next ignition, you will notice that the light has been reset.

Watch the video!


by ScegliAuto

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