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How to Replace the Main Battery in a Mercedes-Benz B-Class (W247)

Model: Mercedes Classe B MK 3, W247 - Years: 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
Part: Battery

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Video tutorial

In this tutorial, you will see how to replace the main battery in a Mercedes-Benz B-Class (W247) by following a few simple steps: lift the bonnet and secure it with the appropriate prop. The first thing you need to do is remove the battery cover by pulling towards you and unhooking the appropriate clips.

Now, unscrew the 13 mm bolt at the bottom. Once the bolt is removed, disconnect the connector (to avoid losing data, you can connect another battery to the positive and negative terminals on the chassis to maintain power).

After removing the plate, you need to remove another hidden bolt (see video); then lift the plate, and under the plastic cover, there will be the bolt that holds the strap; after unscrewing both the negative and positive, you can pull out the entire battery block.

Once the old battery is removed, install the new battery by reversing the procedure.


Updated on 5 July 2026 by ScegliAuto


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Glow plugs, as the name suggests, raise the temperature of the engine in diesel vehicles to allow for easier starting. The manufacturer, in this case, Fiat for the Ducato 2.3 Multijet, specifies how often they should be replaced, and a warning light will illuminate when it's time. This work is carried out under the bonnet. First, remove the upper engine cover, then lift the coil and, using a socket wrench of the appropriate size, unscrew the glow plug to remove it from the base, followed by installing the new one.

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by ScegliAuto

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