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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

To reset the Service light on a Mercedes S-Class, turn the ignition on by rotating the key in the ignition switch. Once the dashboard lights up, press and hold the OK button and the button for answering calls. A menu will appear where you need to select "ASSYST PLUS". Then, you can choose "Complete Service", "Service A", and "Full Service". This will reset the Service light, and you will see on the dashboard when the next service is due.

Updated on 13 August 2026 by ScegliAuto

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