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How to Replace the Key Fob Battery for the Mercedes A-Class?

Model: Mercedes Classe A W177 - Years: 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
Part: Key

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Video tutorial

Replacing the dead battery in the key fob for the Mercedes A-Class is very simple. Let's see how to proceed in this tutorial.

For this operation, you need two replacement batteries of type CR2016. Start by extracting the emergency metal key by pressing the designated button. Then, use the tip of the key itself to unlock the battery drawer, as shown in the video.

Once extracted, replace the dead battery, or both, ensuring to position them with the positive terminal facing up. Finally, reinsert the drawer and the key into their respective slots.


Updated on 9 June 2026 by ScegliAuto


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How to Open the Hood of the BMW X3

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by ScegliAuto

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