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How to Reset the Service Light in the Mercedes M-Class?

Model: Mercedes Classe M W166 - Years: 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
Part: Service warning light

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Video tutorial

In this tutorial, you will learn how to reset the service light in the Mercedes M-Class, a very simple and quick operation to perform only after completing all required scheduled maintenance tasks. Start by entering the cabin, then insert the key and turn on the ignition.

Next, press and hold both the call button and the "OK" button on the steering wheel, enter "ASSYST PLUS", "Full Service", and perform the reset by selecting the "Conf. Full Serv." option. To complete the procedure, simply restart the vehicle.


Updated on 12 October 2026 by ScegliAuto


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by ScegliAuto

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