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How to Reset the AdBlue Warning on a Mercedes

Model: Mercedes Mercedes Various
Part: AdBlue warning light

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The method shown in the video is a professional one, obtained with advanced diagnostic tools such as Xentry/Star Diagnose; Autel; Launch, etc.; a procedure that requires specific equipment and software, more suited to a specialised workshop than to a user, for whom we recommend these standard procedures instead: insert the key and turn on the instrument panel; wait 30/60 seconds, turn off the car, and remove the key. If the vehicle is keyless, walk away.

Wait 3/5 minutes and restart the car. Sometimes, it may be necessary to drive a few miles (10/15) for the update.

Alternatively, disconnect the negative terminal of the battery, wait an hour to allow the control units to reset. Reconnect the battery and drive a few miles to allow the control units to recalibrate.

If nothing works, then you need to go to a workshop and rely on the method shown in the video; otherwise, it means there is a physical fault in the system.


Posted on 11 July 2026 by ScegliAuto


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