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How to replace the auxiliary battery of a Mercedes CLA?

Model: Mercedes CLA C117, X117 - Years: 2013, 2014, 2015, 2016, 2017, 2018, 2019
Part: Battery

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Video tutorial

To replace the auxiliary battery of a Mercedes CLA, start by opening the trunk, where the battery is located. Before starting, make sure the vehicle is turned off and the keys are away from the car to avoid accidental short circuits.

Lift the floor covering of the trunk to access the lower compartment, where you will find the auxiliary battery, usually located near the spare tire or inside a specific housing. Once you have located the battery, unscrew the clamps that connect the cables, starting with the negative one to avoid short circuits.

After disconnecting both clamps, remove any screws or supports that secure the battery to its base and lift it carefully. Take the new auxiliary battery and position it in the compartment in the same orientation as the previous one, then screw the supports back in to secure it. Reconnect the positive clamp first and then the negative one, making sure the connections are secure to ensure a stable connection.

Reposition the trunk covering, close the compartment, and start the car to verify that the system recognizes the new battery and that everything is functioning correctly.


Posted on 26 May 2025 by ScegliAuto


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