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How to Replace the Key Fob Battery in a 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

To replace the battery in the key fob of a Mercedes A-Class, start by removing the black plastic panel on the back of the device. Once this cover is removed, you can slide out the side compartment of the key, which contains the battery.

After removing the compartment, take out the old battery and replace it with a new one. Then, insert the new battery into the compartment, place it back into the key fob, and close it with the rear plastic panel.


Updated on 25 June 2026 by ScegliAuto


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How to reset the tyre pressure warning light on the Kia Niro EV?

To reset the tyre pressure warning light on the Kia Niro EV, inflate the tyres until they reach the correct pressure value. This value is indicated on the sticker attached to the driver's door pillar. Once the tyres are inflated, turn on the instrument cluster to check that the warning light has completely disappeared from the display. If it is still present, you may need to drive for a few miles to ensure it disappears completely from the screen.

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