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How to Change the Key Fob Battery on a Mercedes A-Class W169

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 short and simple guide, learn how to disassemble and replace the battery in the key fob for the Mercedes A-Class W169, as well as the B-Class W245. First, take your key fob and start by removing the physical key from inside it; then pry on the sides of the slot to remove the back cover and access the battery compartment, as shown in the video.

At this point, replace the battery with a new one of the correct type (in this case, a CR 2025 3V), inserting it correctly and in the right direction, following the video to the end!


Updated on 29 April 2026 by ScegliAuto


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How to Set the Time in an Audi A4?

In this tutorial, you will see how to set the time in an Audi A4, a very simple and quick operation to perform after replacing the battery or when the time changes. First, insert the key and turn on the instrument cluster. Then, press the "SETUP" button located on the center console. Next, press the upper left arrow button, navigate to the "Time" option, and use the central knob to adjust the clock. Finally, set any necessary formats and save by returning to the main screen.

Watch the video!


by ScegliAuto

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