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Replacing the Backup Battery on Mercedes Class B W246

Model: Mercedes Classe B W246, MK 2 - Years 2011-2019
Part: Battery

If the display on the instrument panel shows "backup battery fault," it may indicate either a real depletion of the backup battery or, on some models with start&stop devices, a fault in the capacitor located behind the handbrake, which should assist in starting when the main battery begins to deplete. In the case of the Class B W246, this battery is located in the passenger compartment, on the passenger side, directly under the mat, beneath the carpet lining in the heel area, practically under the glove compartment.

Updated on 1 March 2026 by ScegliAuto

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What does the "Code 82" message indicate in the Chevrolet Orlando and how to remove it?

If the "Code 82" message appears on the dashboard of your Chevrolet Orlando, it means that the service interval in miles or time has been reached. Once all scheduled maintenance tasks are completed, you can remove the warning by following the simple procedure shown in this tutorial. First, insert the key and turn on the ignition, then press the "MENU" button located on the left control stalk and navigate to the screen displaying the "Reset" option. At this point, press the "SET/CLR" button at the end of the same stalk and confirm the reset.

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