There are 2 stored owner reports matching the fuel system leading-label group for the 2011 Mercedes-Benz ML-Class in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)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.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Aug 31, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.