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Replacing the Battery in a Mercedes A-Class Key

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 video, you will see how to replace the battery in a Mercedes A-Class key (this applies to many other models from the same manufacturer as well). The first step is to extract the key blade by pressing it upward.

With the key blade in hand, force the cover open; it should pop open immediately. Remove the old battery and replace it. The battery used is a CR 2025, 3V. Now, work in reverse: reattach the plastic cover, then reposition the key blade back in place.

Your Mercedes key is now ready and will function correctly.


Updated on 30 April 2026 by ScegliAuto


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How to reset the tyre pressure warning light on the Kia Niro EV?

To reset the tyre pressure warning light on the Kia Niro EV, inflate the tyres until they reach the correct pressure value. This value is indicated on the sticker attached to the driver's door pillar. Once the tyres are inflated, turn on the instrument cluster to check that the warning light has completely disappeared from the display. If it is still present, you may need to drive for a few miles to ensure it disappears completely from the screen.

Watch the video!


by ScegliAuto

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