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How to Change the Remote Battery for the Mercedes-Benz A-Class

Model: Mercedes Classe A W177 - Years 2018-2026
Part: Key

Take the key and locate a small button on the back. Press this button while simultaneously sliding the black cover outward with your fingers. Once the cover is removed, there is a slot on the side of the key that holds the battery. Remove the battery cover. Pay attention to the type of battery and the orientation (positive "+" and negative "-"), take out the battery and replace it with a new one. Reinsert the battery slot into the key in the same direction, take the black cover again and slide it back onto the key.

Updated on 18 June 2026 by ScegliAuto

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