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How to Reset the Mercedes A-Class Service Light

Model: Mercedes Classe A W169 - Years 2004-2012
Part: Warning light – error code

To reset the service light for maintenance on a Mercedes A-Class, first turn on the vehicle's ignition. Then, press the TRIP A button located on the left side of the instrument cluster to access the vehicle's mileage. Next, press the call button and then OK to enter the service menu. From the service menu, use the arrow keys to select ASSYST PLUS, then select FULL SERVICE, press the OK button, and wait for the reset process to complete. Return to the main menu and then turn off the ignition.

Updated on 22 September 2026 by ScegliAuto

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