There are 2 owner-reported fuel system complaints for the 2011 Mercedes-Benz ML-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The contact owns a 2011 Mercedes-Benz ML350. The contact stated while driving 45 MPH, the contact noticed that the check engine warning light was illuminated. The contact stated that the message indicating an EVAP leak was displayed. The contact checked and noticed that there was a leak underneath the vehicle coming from the fuel tank. The vehicle was not diagnosed. The manufacturer was not contacted. The failure mileage was 114,000.
DEF/ADBLUE HEATER FAILURE. IT APPEARS IT IS COMMON FOR THE DEF/ADBLUE HEATER TO FAIL. I HAVE BEEN TOLD BY MERCEDES SERVICE THAT THEY REDESIGNED THE HEATER BECAUSE OF THE COMMON FAILURE OF THIS PART BUT THEY ARE NOT REPLACING THEM AS A RECALL. (SAME PROBLEM WITH VW WHICH IN NOW COVERED)
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026