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How to Reset the B5 Service in the Mercedes C-Class?

Model: Mercedes Classe C W205 - Years: 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
Part: Warning light – error code

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Video tutorial

In this tutorial, you will see how to reset the B5 service in the Mercedes C-Class, a very simple and quick operation. Before proceeding, make sure to complete all required tasks.

Start by inserting the key and turning it to the first position. Then, press and hold the call button, and a fraction of a second later, press and hold the "OK" button as well.

At this point, in the menu that just appeared, enter "ASSYST PLUS", select "Full Service", and finally perform the reset by confirming the option "Conf. Full. Serv." You can verify that the procedure was successful by restarting the ignition.


Updated on 14 May 2026 by ScegliAuto


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by ScegliAuto

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