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Where is the Auxiliary Battery Located in the Mercedes A-Class?

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

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Video tutorial

In this video, you can see where the auxiliary battery is located in the Mercedes A-Class and how to proceed if you need to replace it. As shown, the battery is positioned inside the cabin, specifically within the center tunnel just behind the gear shift lever.

To access and replace it, first, remove the side panels, then take off the armrest trim and unscrew the two screws indicated with a T20 Torx wrench.

Once the upper panel is removed, you can disconnect both terminals, extract the battery, and install the replacement.


Updated on 1 September 2026 by ScegliAuto


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by ScegliAuto

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