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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 key fob battery in a Mercedes A-Class, extract the integrated mechanical key by pressing the release button on the fob. Next, use the key itself or a small tool to detach the rear cover of the shell. Once the battery compartment is open, remove the dead battery, paying attention to the orientation and polarity.

Insert a new battery of the same type, ensuring it is correctly positioned in the slot. Finally, close the cover until it clicks into place, reinsert the mechanical key, and check the operation of the vehicle's lock and unlock buttons.


Posted on 9 July 2026 by ScegliAuto


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How to Open the Fuel Flap on a Volkswagen Tiguan?

To open the fuel flap on a Volkswagen Tiguan, first unlock the car using the appropriate button on the remote. This will open the car and unlock the mechanism that controls the fuel flap. At this point, apply light pressure to the left side of the flap to open it and access the cap underneath. Once this is unscrewed, you can refuel and then close everything.

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by ScegliAuto

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