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

Model: Mercedes Classe A W168 - Years: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
Part: Key

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Video tutorial

How to change the batteries in your Mercedes key fob (A-Class, but more or less all Mercedes key fobs work this way). The batteries are ECR2025, which vary in price from $5.30 to $11.30 each on major e-commerce platforms. The price varies depending on the brand.

Open the top part of the back of the key, which is snap-on, and remove the two old batteries. Now, simply reposition the new ones, making sure to insert them in the correct orientation so they will work: the side with the engraved numbers should be facing up. Now you can close the back cover of the key fob. The job is complete.


Updated on 4 July 2026 by ScegliAuto


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How to open the bonnet on a Volkswagen Golf?

In this tutorial, you will see how to open the bonnet on a Volkswagen Golf MK4. This is a very simple operation that follows the standard procedure. First, open the driver's door, then locate the lever in the lower left area and pull it. Next, move to the front of the vehicle, lift the bonnet slightly, and find the second lever located just above the Volkswagen logo. At this point, simply pull it towards you, fully open the bonnet, and secure it with the prop rod. To close it, gently push it down.

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