2015 MERCEDES-BENZ ML350 Complaints

The failed/malfunctioning component appears to be the fuel pump controller / fuel pump control unit, and possibly the fuel pump system. The Mercedes-Benz dealer identified water/moisture-related damage and corrosion at the fuel pump controller area. The failed component should be available for inspection if the dealer preserves the part during repair. I have requested that the dealer not discard the damaged component. My safety and the safety of others were put at risk because the fuel pump controller is related to fuel delivery. If it fails, the vehicle may not start, may lose fuel supply, or may stall while driving. This creates a safety risk, especially if the vehicle stalls in traffic, at an intersection, on a highway, or during normal driving. The problem has been confirmed by a Mercedes-Benz dealership. The dealership diagnosed water/moisture damage to the fuel pump controller area and provided an estimate of $768.22 for fuel pump controller replacement, plus $244.88 for the inspection fee. The dealer also indicated that this was the first inspection and that the fuel pump itself may also need further inspection or may have related damage. The vehicle/component has been inspected by a Mercedes-Benz dealership. Mercedes-Benz USA / the manufacturer’s representative has also reviewed the case through its goodwill process, but they refused to treat it as recall-related coverage. To my knowledge, the vehicle has not been inspected by police or insurance representatives. Prior to the current failure, the vehicle had starting/no-start related symptoms beginning around the middle of 2023. The engine could not start successfully at times. I do not recall receiving a clear warning lamp or message specifically identifying the fuel pump controller before the failure. However, the symptoms were consistent with a fuel delivery problem, and the dealer later confirmed water/moisture corrosion damage in the fuel pump controller area.

In July 2025, the sunroof panel had lifes and was flapping at highway speeds. I immediately contacted a Mercedes-Benz dealer to report the hazard. I was told they were unaware of such an issue and that I would have to pay for the repair out-of-pocket. Due to financial hardship, I could not afford the repair at that time. in. In early February, while driving on the highway, the entire sunroof panel catastrophically detached and flew off the vehicle. This created an immediate and severe road hazard for other drivers. This incident matches the 'adhesive bonding failure' described in other Mercedes-Benz sunroof recalls (e.g., Recall 21V-197), but my specific VIN was not included in that list.

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.

Cam Shaft replacement diagnosed after week and half visit to Mercedes Benz dealership for engine rattling at cold start up. We are left with a $10,000 repair after performing all scheduled maintenance at the Mercedes Benz dealership since owning in 2015.

The contact owns a 2015 Mercedes-Benz ML350. The contact stated that while driving at various speeds, the vehicle shook abnormally before the vehicle lost automotive power. The contact was able to restart the vehicle and take the vehicle to a local dealer. The contact stated that the vehicle was repaired under NHTSA Campaign Number: 22V955000 (Fuel System, Diesel, Fuel System, Gasoline); however, the repair failed to prevent the failure. The contact stated that two weeks after the recall repair, the failure reoccurred. The check engine warning light was illuminated. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The vehicle was scanned by a local independent mechanic who retrieved DTC: P035413, A10D, P072102, U016886, V1FBD04, 94C3, V1DAV54, V1DBD31, P030085, and V142E31. The manufacturer was made aware of the failure. The failure mileage was approximately 88,000.

I was in drive mode and was looking to park the car on the open spot on the street. Had engaged the reverse gear and was attempting to get in the parallel parking spot. While i was doing that, suddenly the wheel locked up and car stopped with a jerk/jolt. Then came warning that the parking brake was not working (Remember I had not engaged the parking brake as I was in drive mode). The locked up wheel would not move and I had great difficulty in making the car safe in the cross traffic. The issue here is parking brake cannot engage by itself. That has nothing to do with the age of the car, it is like the wheel cannot come off just because the car is old. This could have easily happened while the car was in motion at a higher speed, in that case with 1 wheel locked, a car would spin out of control in a moving traffic causing major damage to other vehicles and myself. Mercedes's rep claimed it was a maintenance item. Parking brake engaging by itself is a maintenance item?? We should put a notice to all customers and your life is in danger because the parking brake can engage by itself locking the wheel anywhere anytime. I am very apprehensive of this design which allows for auto lock of a wheel. It must be investigated and all the parking brake systems should be replaced as it can happen to anyone. Thank you

The contact owns a 2015 Mercedes-Benz ML350. The contact stated while reversing, the vehicle stalled and failed to restart. The vehicle was towed to the local mechanic who determined that the fuel pump was faulty and needed to be replaced. The fuel pump was replaced, and the vehicle was repaired. The local dealer and manufacturer were notified of the failure, but no assistance was offered. The contact was informed that the VIN was included in NHTSA Campaign Number: 22V955000 (Fuel System, Diesel, Fuel System, Gasoline). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 120,000.

The center console box will jot close. I have researched and this is a common problem with this car. You can not just replace the closure part it requires a whole new box. This is at a cost of 400.00plus dollars. This is obviously a defect.

precense of some liquik oil from up motor litle meiby ist because change oil because i buy recently , i need observed ,ore time today i clean this area.

The contact owns a 2015 Mercedes Benz ML350. The contact stated that the rear driver’s side door failed to close properly after several attempts. The vehicle was taken to a dealer and the contact asked the mechanic to inspect the vehicle. The door failed to open after several attempts. The contact was provided an estimate for the repair. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 58,000.