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How to Replace the Key Battery of the Mercedes C-Class W206

Model: Mercedes Classe C W206 - Years: 2021, 2022, 2023, 2024, 2025, 2026
Part: Key

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Video tutorial

To replace the battery inside the smart key of your new Mercedes C-Class W206 (2022 model), carefully follow the instructions below. First, locate the button on the back cover and press it. At the same time, pull up the top part of the cover and remove the physical emergency key. Now, use this key to open the cover and remove the protective cap of the battery holder.

Finally, remove the old battery and replace it with a new, fully compatible battery.


Updated on 9 August 2026 by ScegliAuto


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by ScegliAuto

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