What 66 owners told NHTSA about the 2015 Mercedes-benz Ml-class

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.

NHTSA ODI 11739473

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.

NHTSA ODI 11719355

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.

NHTSA ODI 11711956

Rear subframe rusted from the inside out causing structural failure. This matches the defect in Campaign #2023020002 for other Mercedes models."

NHTSA ODI 11711610

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.

NHTSA ODI 11676806

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.

NHTSA ODI 11652759

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

NHTSA ODI 11592867

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.

NHTSA ODI 11589651

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.

NHTSA ODI 11577425

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.

NHTSA ODI 11565307

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.

NHTSA ODI 11544793

The contact owns a 2015 Mercedes-Benz ML350. The contact stated while reversing, there was an abnormal sound coming from the vehicle. No warning light was illuminated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure and determined that the VIN was not included in a recall. The failure mileage was unknown.

NHTSA ODI 11543484

The contact owns a 2015 Mercedes-Benz ML350. The contact stated while driving at undisclosed speeds, the vehicle temporarily lost motive power before returning to normal driving functionality. There was no warning light illuminated. The vehicle was taken to a dealer and the contact was informed that the check engine light displayed after repairing the vehicle under NHTSA Campaign Number: 22V955000 (Fuel System, Diesel, Fuel System, Gasoline). The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 79,000.

NHTSA ODI 11540040

The contact owns a 2015 Mercedes-Benz ML400. The contact stated while driving 45 MPH, the vehicle lost motive power without warning. The vehicle was towed to the residence. The dealer was contacted and stated the vehicle was not included in NHTSA Campaign Number: 22V955000 (Fuel System, Diesel, Fuel System, Gasoline). The vehicle was not diagnosed. The vehicle was not repaired. The manufacturer was contacted and stated that the VIN was not included in the recall. The contact was referred to the NHTSA Hotline for assistance. The failure mileage was 79,000.

NHTSA ODI 11540104

On 8/15/23 on my parking explode air bag , completely make me blind.Nader air bag push my legs from brake and Car still was driving and stop a the wall, I was completely blind, destroyed my car ,Pain my legs , my arms my head incrediblo,my body is all blue, Thanks to God I am still life. Always I take care my car and I was in Mercedes -Benz dealer in Fletcher N C check my car before I wil drive back home to Florida he told me everything is good and safe .to drive .I need help .All my life I drive Mercedes-Benz .Mercedes mechanic must check car before release to customer to drive ,Please help me with nader car.

NHTSA ODI 11539120

In April 2023, while performing a rear brake service both right and left suspension springs were found with deteriorated suspension spring coating, corrosion and breakage of the coil springs. Suspension spring failure poses a safety hazard and risk of damage to other suspension components. It is unclear when exactly the springs broke but when the vehicle was inspected in Feb of 2022 there was no mention of spring breakage. The date of incident is the date I discovered the spring breaks. I only took a pic of the one spring but both were confirmed broken. MB dealership confirmed breakage. Communication with Mercedes Benz was not successful.

NHTSA ODI 11525691

The contact owns a 2015 Mercedes-Benz ML350. The contact received notification of NHTSA Campaign Number: 22V955000 (Fuel System, Diesel, Fuel System, Gasoline) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated while driving approximately 40 MPH, the vehicle started to lose motive power and was making an abnormal sputtering sound as if the vehicle was running out of gasoline. The contact stated that the vehicle stalled with the check engine warning light illuminated. The contact pulled over and was able restart the vehicle. The failure had become a recurring failure. The manufacturer had not been made aware of the failure. The failure mileage was approximately 104,000. Parts distribution disconnect.

NHTSA ODI 11523279

The cam shaft adjuster failed, causing a loss of power in the engine. Vehicle could not maintain speed on hills or merge onto interstates in this condition.

NHTSA ODI 11522582

Engine stalled multiple times even though it has been serviced multiple times at multiple dealers.

NHTSA ODI 11517158

I took my car in for a different repair and they found this issue as well. "Diagnostic - Oil leak (Visual): front covers leaking oil down front of engine." The leak was due to a crack in the sealing cap. My car 2015 Mercedes ML350 4Matic is in the recall for 2018070015 but my VIN number was not included in the recall although I am having the exact issues the recall covers. Recall 2018070015 "correct oil level as necessary and replace the reservoir sealing cap to prevent oil foam from leaking out."

NHTSA ODI 11508373

There is a recall for this significant safety risk. I contacted my local Mercedes Benz about recall remedy on 6 January 2023 and they confirmed the recall and said MB would issue steps to get this taken care of in the beginning of February. It is now 18 February 2023 and this has not happened and I have received no communication from MB and yet the safety risk still exists and could be life threatening.

NHTSA ODI 11507997

My viechle is loss of propulsion without warning on the freeway last week on a raining day. After brought the car to West Covina Dealer inspected the car is leaking water that has entered the spare wheel well, the accumulated water could intermittently contact the fuel pump control unit caused loss propulsion. And there are some circuit boards and wires damaged due to a water leak and not drive able. The West Covina MB dealer is refuse to fix until MBusa responsible for the cost. Please help what other option we have about this issue?

NHTSA ODI 11502923

Steering wheel tilt adjustment failed. Without adjustment it is impossible to steer the automobile safely due to hand placement for control. This is apparent especially when there are multiple drivers. There is not a manual over ride since the system is controled electrically

NHTSA ODI 11496940

The contact owns a 2015 Mercedes-Benz ML350. The contact stated while driving at an undisclosed speed, the engine seized without warning. The vehicle was towed to the local dealer where it was diagnosed there was a possible mechanical break down due to engine sludge, ignition varnish rust, corrosion, dust, cracked rubber, dry rot, road chemicals, alterations or improper oil, coolant, fuel, or lubricants. The vehicle was not repaired. The manufacturer was not contacted. The approximate failure mileage was 70,273. The contact stated that they did not submit this complaint and the vehicle actually belongs to another individual.

NHTSA ODI 11487180

takata airbags- call Mercedes Benz of Draper says it is not on their list????

NHTSA ODI 11486917