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

Model: Mercedes Classe S W221, MK 5 - Years 2005-2013
Part: Service warning light

You can turn off the Service light on the instrument cluster of the Mercedes S-Class by turning the key in the ignition switch: once it is on, press and hold the OK button and the button to answer calls. This will display a menu, from which you need to select "ASSYST PLUS": then choose the options "Complete Service", "Service A", and "Full Service". At this point, the Service light will be reset, and you will see on the instrument cluster when the next service is due.

Posted on 1 April 2026 by ScegliAuto

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