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How to Change the Key Fob Battery on the Mercedes A-Class - B-Class

Model: Mercedes Classe B MK 1, W245 - Years: 2005, 2006, 2007, 2008, 2009, 2010, 2011
Part: Key

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Video tutorial

In this video tutorial, you will learn how to disassemble and replace the battery in the key fob for the Mercedes A-Class W169 and also the B-Class W245 (first series). First, take your key fob and remove the key by sliding the button; then, pry open the sides to remove the back cover and access the battery compartment, as shown in the video.

At this point, remove the battery and replace it with a new one of the correct type (in this case, a CR 2025 3V); insert it the right way round and reassemble everything!


Updated on 22 April 2026 by ScegliAuto


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How to Reset the Tire Pressure Light on a MG ZS?

On the instrument cluster of the MG ZS, the tire pressure light that appears can be reset by inflating the tires to the correct pressure: this value will be indicated on the sticker attached to the driver's door pillar. Once the tires have been properly inflated, you can turn on the instrument cluster and navigate through the menu until you find the option that indicates tire pressure: if this screen shows the new values, the light will turn off; otherwise, you will need to drive for a few miles so that the sensors can read the new values and turn off the light afterward.

Watch the video!


by ScegliAuto

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