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How to Replace the Remote Battery on a Mercedes B-Class?

Model: Mercedes Classe B W246, MK 2 - Years 2011-2019
Part: Key

If the battery in the remote for the Mercedes B-Class is flat and needs replacing, follow this video tutorial that shows how to proceed; it is a very simple and quick operation. First, slide the small button down and extract the metal emergency key. Using the same key, open the rear cover of the remote by inserting it into the slot indicated in the video and lever it open. Once the cover is slightly lifted, you can completely remove it by hand. At this point, proceed to replace the battery with an equivalent model, namely CR2025.

Updated on 28 April 2026 by ScegliAuto

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