There are 5 owner-reported electrical system complaints for the 2015 Mercedes-Benz ML-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
In mid-trip as we were going down the highway went to change lanes and the turn signals were no longer functioning. No errors, no alerts, no warnings they just stopped working. After pulling over and turning off the vehicle and turning back on they work for a time then stop working again. After researching with other owners of these and similar model Mercedes Benz vehicles this is a prevalent and highly dangerous safety issue that many many others have experienced.
Front passenger door lock is registering as locked when it is actually insecure which is a safety issue. Thank you. Unknown start date. Recently purchased vehicle. This weekend passenger for the first time and discovered issue.
"PRE SAFE FUNCTIONS LIMITED" MESSAGE APPEARED ON DASHBOARD IN NOV '16. OVER COUPLE MONTHS, AUDITORY BEEP WARNING OF BEING TOO CLOSE TO SOMETHING HAPPENED WITH NO HAZARD NEARBY APPROX 6 TIMES. ON 4/2/17, WHILE DRIVING 35 MPH ON SUNNY DAY, AUDITORY WARNING STARTED (WITH NO HAZARD NEARBY) THEN STOPPED WHEN WE STOPPED AT TRAFFIC LIGHT. BEEPING STARTED AGAIN (WITH NO HAZARD NEARBY) WHEN WE STARTED DRIVING, THEN CAR SELF-BRAKED WHILE DRIVING AT LEAST 20 MPH AND CARS AROUND US STARTED HONKING. STARTED DRIVING AGAIN AND CAR SELF-BRAKED AGAIN. WE PULLED INTO A PARKING LOT AND TURNED OFF THE CAR FOR A FEW MINUTES, CALLED CAR DEALER. SENSORS IN FRONT DID NOT APPEAR DIRTY OR BLOCKED BY ANYTHING. WE WERE ABLE TO DRIVE HOME 10 MIN WITHOUT INCIDENT. NEXT DAY, CAR DEALER REPORTED IT WAS A COMPUTER ISSUE THAT THEY FIXED BY UPDATING SOFTWARE. PAPERWORK READS "PERFORMED REPAIR AS PER BULLETIN." ON 4/4/17, "PRE SAFE FUNCTIONS LIMITED" WARNING APPEARED AGAIN.
DRIVING VEHICLE ALL DAY NO PROBLEMS .IT JUST TURNED 20,000 MILES. WAS DRIVING ON ROAD WHEN VEHICLE STARTED SURGING, LIKE OUT OF FUEL, WENT DOWN ROAD A LITTLE FURTHER AND IT HAPPENED AGAIN .THIS TIME I SMELLED STRONG DIESEL FUEL FUMES. SMOKE STARTING COMING OUT FROM UNDER HOOD. . I PULLED OFF ROAD AND SHUT CAR OFF. I OPENED HOOD LOTS OF SMOKE AND ENGINE COMPARTMENT COMPLETELY SOAKED WITH DIESEL FUEL ! HAD TO CALL ROADSIDE ASSISTANCE. GOT TOWED IN TO MERCEDES BENZ OF NORTH HAVEN CT. SERVICE DEPT TODAY SAYS LOOKS LIKE A RODENT CHEWED SOMETHING IN YOUR ENGINE COMPARTMENT. AND THAT CAUSED YOUR FUEL LEAK. THEREFORE WE ARE NOT COVERING ANYTHING UNDER WARRANTY. IT WILL COST ABOUT $4500 TO FIX .THIS IS RIDICULOUS AND VEHICLE IS UNDER FULL WARRANTY AND EXTENDED WARRANTY ! I WAS DRIVING THIS CAR ALL DAY .IT BROKE DOWN AT 2:30 IN THE AFTERNOON..MERCEDES BENZ IS LUCKY THE CAR DIDN'T CATCH FIRER AND BURN TO THE GROUND. MAURO MOTORS NEEDS TO MAKE GOOD ON THE WARRANTY AND FIX AT NO CHARGE. I HAVE A AUTOMOTIVE BACKGROUND AND JUST CANT BUY WHAT THEY ARE SAYING THE CAUSE IS FROM..WE OWN 2 MB VEHICLES AND THIS IS UNHEARD OF. WE WILL CONTACT OUR LAWYER ABOUT THIS ISSUE IF NOT RESOLVED. REGARDS, [XXX] [XXX] H: [XXX] C:[XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).'*JB
COMMAND SYSTEM OF CAR NOT RESPONDING PROPERLY, ENGINE LIGHT ILLUMINATED, LOUD NOISES FROM ENGINE. *TR
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