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How to Reset the Service Light on the Mercedes A-Class W177

Model: Mercedes Classe A W177 - Years: 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
Part: Warning light – error code

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Video tutorial

Thanks to the video support in this article, you will see the procedure to reset the maintenance/service light on the Mercedes A-Class W177. The procedure is simple and takes little time to complete. To reset the light, first start the instrument cluster.

Then, press the back button and the navigation button simultaneously for about 5 seconds. This will open the menu.

Navigate in the menu by going left until you find the workshop option, select it, scroll down to ASSYST PLUS, then select the maintenance option, confirm that you want to reset the service, now confirm the type of oil used for maintenance, confirm that the maintenance has been completed, and confirm that you want to reset.

At this point, the procedure will be complete, and the light will be reset.


Updated on 25 October 2026 by ScegliAuto


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On the instrument cluster of the MG ZS, the tire pressure light that appears can be reset by inflating the tires to the correct pressure: this value will be indicated on the sticker attached to the driver's door pillar. Once the tires have been properly inflated, you can turn on the instrument cluster and navigate through the menu until you find the option that indicates tire pressure: if this screen shows the new values, the light will turn off; otherwise, you will need to drive for a few miles so that the sensors can read the new values and turn off the light afterward.

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by ScegliAuto

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