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Where is the auxiliary battery of the Mercedes CLA W118 located?

Model: Mercedes CLA C118, X118 - Years: 2019, 2020, 2021, 2022, 2023, 2024, 2025
Part: Battery

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Video tutorial

Let's see where the auxiliary battery of the Mercedes CLA W118 is located: it is found inside the cabin, under the center tunnel. To access it, we need to move the handbrake lever to its lowest position and remove the cover of the center console that surrounds the base of the handbrake lever.

This cover is secured by hidden clips. To avoid breaking these clips (which someone had already damaged in the video), we need two hex keys to insert into two specific holes on the cover to unlock the safety tabs.

Once the cover is removed, the auxiliary battery will be visible and accessible. After replacement, it is also necessary to register this battery in the BMS, specifying the type, capacity, and manufacturer code.


Posted on 14 December 2025 by ScegliAuto


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