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Resetting the Service Light on a Mercedes M-Class

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

Below are the steps and instructions to reset the service light for routine maintenance on the Mercedes M-Class. First, get into the vehicle and start the ignition; then press and hold the call button and the "OK" button to enter the service menu and select the "Assyst Plus" option, as shown in the video. Now, enter the "Full Service" section to confirm and execute the reset of the service light and maintenance key from the instrument cluster.

Posted on 17 July 2026 by ScegliAuto

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