How to Reset the AdBlue Level on Mercedes-Benz Diesel Vehicles

About this video

If you’re getting a warning about low AdBlue in your Mercedes-Benz ML Diesel OM642, it’s essential to top off the AdBlue tank and reset the system to avoid performance issues. After filling the AdBlue tank, the reset process can be done using a diagnostic scanner or via the vehicle’s menu system. Resetting the AdBlue level ensures that the vehicle accurately reflects the new fluid level and clears any warning lights. If the warning persists after a refill and reset, it could indicate an issue with the AdBlue injector, pump, or sensors, requiring further diagnosis.

Applicable Vehicles:
This method applies to Mercedes-Benz ML Diesel OM642 models, including:

ML320 CDI (W164)
ML350 BlueTEC (W164, W166)
ML250 BlueTEC (W166)
ML400 BlueTEC (W166)