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How to replace the key battery in the Mercedes A-Class W169

Model: Mercedes Classe A W169 - Years 2004-2012
Part: Key

In this new mini guide, you will learn how to replace the battery inside the key of your Mercedes A-Class W169. First, make sure you have a new CR2032 battery and then proceed to remove the emergency key from the remote cover. Next, take a small flathead screwdriver and use it to remove the rear cover. Finally, remove the dead button battery and replace it with the new one. Reattach the rear cover and the procedure is complete.

Updated on 18 September 2026 by ScegliAuto

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