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How to Reset the "Service A7" Light on the Mercedes C-Class

Model: Mercedes Classe C W205 - Years 2014-2021
Part: Service warning light

To reset the "Service A7" light on the Mercedes C-Class, insert the ignition key and turn it to the first position. Now, press the OK button and the button for answering calls simultaneously, which are located on the two side spokes of the steering wheel. At this point, in the menu that appears, select "ASSYST PLUS", then "Full Service", and finally, you can reset by confirming the "Conf. Full Serv." option. At the end of the procedure, you can turn off the instrument cluster to complete.

Updated on 25 August 2026 by ScegliAuto

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