There are 10 owner-reported engine complaints for the 2008 Mercedes-Benz ML-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Engine died and won't run. Known issue with MB balance shaft that they refuse to repair or help with the cost of a $8k job. Highly disappointed.
MONDAY MORNING, JULY 24, 2017 THERE WERE TORRENTIAL DOWNPOURS IN THE EARLY MORNING LEAVING LOTS OF STANDING WATER ON ROADWAYS. AFTER DRIVING THE CAR AND GOING THROUGH STANDING WATER ON ROADWAYS, CAR LOST POWER AND THEN ENGINE STOPPED. FORTUNATELY, I WAS ABLE TO COAST ONTO THE SHOULDER OF THE ROADWAY AND CAME TO A SAFE RESTING PLACE. CAR WOULD NOT RESTART. I WAS STRANDED WITH AN INOPERATIVE VEHICLE.
TRUCK JUST SHUT OFF WHILE SITTING AT THE STOP LIGHT AND ONCE WHILE TAKING OFF AT THE LIGHT AND WOULDN'T START BACK AFTER A FEW TRY'S
A SEAL FOR THE ENGINE OIL COOLER FAILED. THE COOLER LEAKED OIL ONTO THE UNDER-ENGINE PAN AND WAS NOT DETECTED AS A LEAK ON THE GARAGE FLOOR. HAD THE COOLER FAILED COMPLETELY IT WOULD HAVE CREATED A SAFETY ISSUE IN TRAFFIC. THE SEAL FAILURE APPEARS TO BE A COMMON PROBLEM BUT SHOULD NOT OCCUR UNDER NORMAL USE, WHICH IS HOW THIS VEHICLE IS USED. *TR
TL* THE CONTACT OWNS A 2007 MERCEDES-BENZ ML 350. THE CONTACT STATED THAT WHILE DRIVING 45 MPH, THE VEHICLE STARTED TO DECELERATE WITHOUT WARNING. ALSO, THE CONTACT MENTIONED THAT SMOKE STARTED TO EMIT FROM THE ENGINE COMPARTMENT. THE VEHICLE WAS NOT REPAIRED OR DIAGNOSED. THE VIN WAS NOT AVAILABLE. THE APPROXIMATE FAILURE MILEAGE WAS 87,000.
CARS STALLS WHILE DRIVING. CHECK ENGINE LIGHT IS ON. CARS DOES NOT START, LOSES POWER WHILE DRIVING IT. *TR
MERCEDES HAS MANUFACTURED A DEFECTIVE ENGINE OIL COOLER SEAL. IT NEEDS TO BE REPLACED ON EVERY DIESEL ENGINE AT A COST OF AROUND 4000$. *TR
BOTH REAR BRAKE LIGHT ASSEMBLIES HAVE FAILED. THESE FAILURES INCREASE THE LIKELIHOOD OF A REAR END COLLISION. WHEN THE LEFT ASSEMBLY FAILED IN 2011, I ATTRIBUTED IT TO BAD LUCK. WHEN THE RIGHT ASSEMBLY FAILED AT 66000 MILES IN 2012, IT OCCURRED TO ME THAT MERCEDES MAY HAVE A PROBLEM THAT DESERVES A RECALL ACTION. INSTEAD OF COSTING ABOUT $5 TO $10 FOR LIGHT BULBS THESE ASSEMBLIES COST ABOUT $300 EACH TO REPLACE AND INSTALL. $600 IS ENOUGH TO CAUSE SOME PEOPLE TO NOT REPAIR THEM AND THUS CREATE A SAFETY HAZARD. AT 65000 MILES I ALSO ENCOUNTERED SOME VERY EXPENSIVE TO REPAIR OIL LEAKS THAT MAKE MESSES ON MY DRIVEWAY AND CAUSE WATER POLLUTION WHEN THE OIL RUNS OFF. HAVE YOU HAD ANY REPORTS OF REAR SEAL LEAKS, OIL PAN LEAKS OR OIL COOLER LEAKS ON THIS VEHICLE?
CAR STALLED AT HIGHWAY SPEED OF APPROXIMATELY 55 MPH. DAUGHTER WAS BARELY ABLE TO GET THE CAR STOPPED DUE TO LACK OF POWER STEERING AND BRAKES. WAS BARELY ABLE TO AVOID TREE AND INJURY TO HER AND HER PASSENGER. *TR
THE OIL LEVEL LOW MESSAGE COMES ON EVEN WHEN THE OIL LEVEL IS FULL. THIS OCCURS AT HIGHWAY SPEED WHEN OUTSIDE TEMPERATURES ARE HIGH. *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