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How to Reset the B3 Service Light on a Mercedes C-Class?

Model: Mercedes Classe C W204 - Years 2007-2013
Part: Service warning light

In this tutorial, you will see how to reset the B3 service light on a Mercedes C-Class. This operation is very simple and quick, and should only be done after completing all required scheduled maintenance tasks. First, insert the key and turn it to the first position. Then, press and hold the call button on the steering wheel, and just a fraction of a second later, press the "OK" button. Once this is done, navigate to the "ASSYST PLUS" section, enter "Full service," and perform the reset by selecting the "Confirm" option at the bottom. Finally, restart the vehicle.

Updated on 7 September 2026 by ScegliAuto

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