*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Fuel/propulsion system
Vehicle: 2013 Mercedes-Benz ML350 BlueTEC (OM642 3.0L V6 Turbo Diesel) Current Mileage: Approx. 117,925 miles Dealer / Location: Mercedes-Benz of North Scottsdale (RO #260467) Summary of Safety Issue & Defect: The vehicle is experiencing an active liquid diesel fuel leak from a replacement fuel pump assembly that was previously installed by an authorized Mercedes-Benz dealership four years ago. Active diesel leaks directly over/near hot engine and exhaust components pose an acute, severe vehicle fire hazard and expose cabin occupants to toxic diesel fumes. Additionally, the vehicle exhibits a severe oil leak in the engine inner-V caused by prematurely degraded factory oil cooler seals…
Oct 15, 2025Engine
NHTSA VEHICLE SAFETY COMPLAINT SUPPORTING STATEMENT Vehicle: 2013 Mercedes-Benz ML350 I am submitting this complaint regarding a continuing safety concern involving water intrusion and electronic system damage in my 2013 Mercedes-Benz ML350. My vehicle was subject to a Mercedes-Benz recall involving water intrusion and related components. Despite recall-related repairs being performed, moisture and water intrusion concerns remain unresolved. During the diagnostic process, Mercedes-Benz personnel identified evidence of water and humidity in areas associated with vehicle electronics and control modules. The vehicle has experienced repeated mechanical and electronic issues following discovery…
Dec 17, 2025Fuel/propulsion system
Re: My 2013 ML350- Intermittent Start/ Vehicle cutting off while in heavy traffic. Fuel Pump and Fuel modulator failed due to water collecting in the spare tire wheel-weld causing water intrusion into the fuel system. I paid out of pocket for this service twice, AND then found out from MB Tacoma there was a RECALL with the exact same issue. I took the vehicle in to the closest dealer- Seattle Mercedes to handle the outstanding recall issues. I was advised to contact MERCEDES BENZ USA GOODWILL DEPARTMENT. My initial claim was approved, as I submitted ALL DOCUMENTATION of the repairs related to this issue. NOW, after 5 months of my RECALL REIMBURSEMENT CLAIM BEING BOUNCED AROUND by customer…
Aug 1, 2025Engine
The contact owns a 2013 Mercedes-Benz ML350. The contact stated that while driving approximately 40 - 45 MPH, the vehicle stalled in the middle lane. The driver was able to push the vehicle safely to the roadside. There were no warning lights illuminated. The vehicle was towed to the local dealer, where it was diagnosed, and determined that the fuel pump needed to be replaced. The vehicle was repaired. The following day, it took two minutes to start the vehicle. The vehicle was drivable, but the vehicle eventually stalled while driving. The vehicle was towed to another local dealer, Mercedes-Benz of South Orlando (4301 Millenia Blvd, Orlando, FL 32839), where it was diagnosed with a faulty…
Dec 1, 2025 · 96,000 milesElectrical system
Good morning ! I am an owner of a 2013 ML 350 . I live in San Diego ,CA ,92103 . I was driving my car on [XXX] and it was raining a lot . After around 30 miles I got to my destination parking area and my car died 20 feet away from the parking zone .I tried to reignite it but it wouldnât start . I checked it with a OBD2 scanner and it was indicating a code U0109 - Lost communication with fuel pump control module . After looking into solutions and reasons for the issue online I came across a post regarding an existing recall with NHTSA with ID 22v955 regarding water intrusion in the spare wheel well portion of the trunk( The Wheel well is not water proofed and doesnât have a drain port…
Nov 15, 2025EngineFire
The engine locked up after blowing the top part of the engine off, fire shot out of the engine and quickly went out like a flam thrower. I was driving on the expressway when the accelerator would not work without any warning I didnât have any issues with this truck. The car cut off immediately thank God I was able to coast to the side of the expressway because it stopped in the left lane on the expressway I was scared for our lives. The dealership has the truck and they said the engine is locked up. This morning s unacceptable for a car Iâve had for a year.
Aug 17, 2025Service brakes
Brake Booster failure, this vehicle is exhibiting the EXACT same symptoms as described in Recall Campaign: Campaign No. 2024050001, May 2024 TO: ALL MERCEDES-BENZ CENTERS SUBJECT: Model GL-Class, ML-Class, and R-Class (X164, W164 and 251 platform) Model Year 2006 â 2012 Inspect Brake Booster â without Pedal Rework Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2006-2012 ML-Class, GL-Class, and R-Class (164 and 251 platform) vehicles, the function of the brake booster might be affected due to advanced corrosion in the joint area of its housing. After extended time in the field and in conjunction with prolonged water exposure, this…
Sep 1, 2025Fuel/propulsion system
Fuel system failed carbon and shut off without any notification while driving two times put me at risk of getting hit both times as the vehicle was not in a safe spot. This has been confirmed at the dealership where my vehicle is at this point. It has been inspected by the dealership in Georgetown, Texas. Again, no warning lights just cut off two times while driving. I already had one recall fixed two times dealing with the fuel system and now itâs shutting off with no notice while Iâm driving 60 70 mph and causing a dangerous safety hazard. Dealer stated⦠pressure regulator and control valve field as it is designed to maintain and regulate the amount fuel flowing into the engine.
Jul 11, 2025
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.