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How to Reset the AdBlue Warning Light on a Mercedes

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

Video tutorial
Detailed instructions - To reset the AdBlue warning light using a diagnostic system, follow the instructions in this description and refer to the video images. First, connect the PC with the diagnostic program to the OBD2 port of your vehicle, enter the vehicle model and engine type, and wait for the data to load from the ECU. Then, check for any errors and select the option to reset the additive level. This way, you can select this option and confirm with OK, and the AdBlue warning light on the dashboard will turn off.

Updated on 13 July 2026 by ScegliAuto


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by ScegliAuto

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