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How to reset the service light on the Mercedes M-Class?

Model: Mercedes Classe M W166 - Years 2011-2018
Part: Service warning light

This tutorial shows how to reset the service light on the Mercedes M-Class, a very simple and quick operation, to be carried out only after completing all scheduled maintenance tasks. First, enter the cabin, then insert the key and turn on the instrument cluster. Next, navigate to the screen displaying the odometer, press and hold both the call button and the "OK" button, and in the menu that appears, select "ASSYST PLUS". At this point, enter "Full Service", "Conf. Full Serv.", and confirm the reset.

Posted on 24 August 2026 by ScegliAuto

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