Mercedes-Benz ML-Class Complaints

497 consumer complaints on file.

#11711956January 19, 2026
LANE DEPARTURE: BLIND SPOT DETECTION, EXTERIOR LIGHTING, ELECTRICAL SYSTEM
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11711610January 17, 2026
STRUCTURE:BODY
Rear subframe rusted from the inside out causing structural failure. This matches the defect in Campaign #2023020002 for other Mercedes models."
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11711198January 15, 2026
ENGINE, FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
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 fuel sensor and control valve. The parts were replaced. The contact stated that the fuel pump was replaced four times, but the failure persisted. The manufacturer was contacted and escalated the failure was escalated to an engineer for assistance. The failure mileage was approximately 96,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11704623December 11, 2025
SERVICE BRAKES
It seems that this vehicle was not included in a brake booster recall which included this model from 2005 through 2015. The brakes are not working properly, and brake fluid has entered the master brake cylinder damaging the seal. It is extremely unsafe to operate this vehicle in this condition. Somehow, this vehicle was not included in the recall, but definitely should have been.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700540November 20, 2025
FUEL/PROPULSION SYSTEM
As we were driving 50mph, the car stalled and lost all power. The dashboard lights all lit up and the car wouldn't start. I don't get unnerved easily and it was fairly intense not being able to move your car out of traffic. After about 5 mins, the car would start again only to stop a minute or so later. After taking the car to the dealer, the issue stemmed from the fuel pump electronics board getting wet in the spare tire wheel well where water was accumulating. This was part of the recall and the dealer installed a drain and replaced the board. HOWEVER, this issue again happened nearly one year later in our next rainy season. After taking it to the dealer, they said WE would need to replace the electronics board ourselves. We asked about the recall and they said they fixed the issue by installing the drain plug and there was nothing else they could do for us. Even the service adjuster was upset and very sympathetic to our plight as the car was obviously not fixed. Even though the drain plug was installed, the water was still acumulating in the wheel well. It seems apparent to me, and several others who have complained about the same issue, that the recall fix has not addressed the main issue of why the water is coming in and why it's still not draining. Unfortunately we're going to have to fork over $1200 to have it fixed. My ask to the NHTSA is that this issue be readdressed with Mercedes. I would like them to be notified that the recall does not address the underlying issues and the solution they provided does not fix the problem. I appreciate your time in considering this.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699776November 17, 2025
ELECTRICAL SYSTEM, FUEL/PROPULSION 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 wouldn’t 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 doesn’t have a drain port for water to escape ) . I proceeded with inspecting the area and of course it was full of water . The fuel pump control module is located in that area and it was damaged which shorted it and cause the malfunction of the vechile and the error code U0109 stated above . Tried calling Mercedes Benz but they confirmed about that specific recall but said my VIN is not part of it and I should file a claim or complain with you . I will attach proof and pictures of the water and the damaged component. My car now need to be towed and fixed on my expense because of Mercedes Benz negligence… Hopefully you can add my car to this recall and when this happens I would get some kind of reimbursement… Thank you for your time and understanding. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11688721September 21, 2025
SERVICE BRAKES
Corroded brake lines. This is a well known issue for many ML350s built during this time period. This car was built with steel brake lines that easily corrode and present a serious safety issue. While driving a few months ago, the car suddenly lost the ability to brake because a line rusted completely through. The mechanic noted the lines are rusted in many other places as well. Mercedes refuses to correct this under warranty.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11688328September 19, 2025
ELECTRICAL SYSTEM, LANE DEPARTURE: BLIND SPOT DETECTION
Vehicle: 2014 Mercedes-Benz ML350 VIN: [XXX] I have experienced repeated failures of the Blind Spot Assist / driver-assist system since purchasing this vehicle. When I first purchased the ML350 in Texas, the vehicle already showed warning messages (“Blind Spot Assist Inoperative / Pre-Safe Function Limited”). The dealer attempted repairs before delivery, but the defect persisted. After moving to New York, the problem continued. On June 26, 2023, I took the vehicle to The Automaster Mercedes-Benz in Shelburne, VT. Their diagnosis confirmed water intrusion into the blind spot radar sensors, consistent with Mercedes-Benz TSB LI54.71-P-056477. Both left and right sensors and wiring require replacement. This is a safety defect because Blind Spot Assist and Pre-Safe features are disabled without warning, increasing risk of collision when changing lanes. Many other owners have reported the same issue, and Mercedes has issued a TSB acknowledging the defect, but no recall has been provided. I request that NHTSA investigate this recurring safety problem and require Mercedes-Benz to provide coverage or a recall for affected vehicles. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11686235September 10, 2025
ENGINE
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 didn’t 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 I’ve had for a year.
Crash:
No
Fire:
Yes
Injuries:
0
Deaths:
0
#11685348September 5, 2025
SERVICE 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 – 2012 Inspect Brake Booster – 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 corrosion might lead to a vacuum leak at the brake booster. Loss of braking power puts me and everyone I am near while operating this vehicle in eminent danger!! This problem has been inspected and documented by Mercedes Benz of Macon Ga. 9-3-25 There were no warning lamps or messages present.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11677894August 1, 2025
FUEL/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 it’s shutting off with no notice while I’m 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11676806July 28, 2025
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11675826July 24, 2025
LANE DEPARTURE: BLIND SPOT DETECTION
The contact owns a 2014 Mercedes-Benz ML350. The contact stated that upon starting the vehicle, the blind spot warning light illuminated. The contact was unable to identify if another vehicle was nearby. The vehicle was taken to an independent mechanic who determined that the blind spot detection system was inoperative. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 170,001.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11675862July 24, 2025
SERVICE BRAKES
ABS Pump defective. Dealer refuses to replace this safety item.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11675973July 24, 2025
AIR BAGS
Driver side airbag malfunction without notice .serious bodily injury incase of an accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11670372June 30, 2025
ENGINE, ELECTRICAL SYSTEM, LANE DEPARTURE: BLIND SPOT DETECTION
I purchased a used Mercedes-Benz from Freehold Mitsubishi in early 2024. Within hours, serious safety issues appeared, including a check engine light, cylinder misfire, EVAP leak, traction control failure, and blind spot assist malfunction. The vehicle’s ECM and wiring harness were later found damaged due to oil leaks and electrical shorts. Despite multiple repair attempts, the vehicle was returned in worse condition and remains unsafe to drive. I am reporting these issues due to their potential risk to vehicle safety.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11668077June 20, 2025
FUEL SYSTEM, GASOLINE, FUEL SYSTEM, DIESEL
The contact owns a 2014 Mercedes-Benz ML350. The contact stated while the vehicle was idling in the driveway, the vehicle stalled. The contact stated that AAA added fuel to the vehicle, and the vehicle was able to restart and operated as needed. The contact stated that the vehicle was taken to the dealer for the recall repair of NHTSA Campaign Number: 22V955000 (Fuel System, Diesel, Fuel System, Gasoline), and the dealer installed a water drain plug on the vehicle. The contact stated that the check engine warning light was later intermittently illuminated. The vehicle was taken to Complete Performance, where it was diagnosed with fuel pressure failure. The contact replaced the gas cap; however, the failure persisted. Additionally, the contact stated while driving 45 MPH, the vehicle stalled while there was sufficient fuel in the fuel tank. The contact was able to pull over to the side of the road. The vehicle was able to restart after fuel was added to the vehicle. An unknown dealer was notified of the failure and informed the contact that the fuel pump was not previously replaced during the recall repair of NHTSA Campaign Number: 22V955000( Fuel System, Diesel, Fuel System, Gasoline). The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 60,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657305April 28, 2025
FUEL/PROPULSION SYSTEM, ENGINE, ELECTRICAL SYSTEM
I purchased my car used at the Mercedes dealership in Tyler Texas June 2023. I took all my savings and paid cash and was told that the car was impeccable shape and there were no current issues and all the service records were up to date. November 2023 is when everything started happening and my engine light came on. It was revealed to me by a service tech that I was sold the vehicle with an existing major oil leak /seals broke. Etc. SEE Attached invoices. I have endured driving down the road and my car just giving out and losing power steering. The car has been sputtering and there have been misfires, fauled fuel injectors, coils, s and spark plugs, oil leaks, fuel pump leaking gasoline in the engine and smoke coming from the hood. I thought my car was going to start on fire it smelled like a hot electrical wires and gasoline. My nerves are frayed from this car because of how many times it has broke down. I have missed work because of the car, I'm behind on my home bills, I missed my airline flight to see my sick father, I have had to pay for rental cars, all due to this vehicle. I am very concerned for my safety in this vehicle and I would like the vehicle fixed at the expense of Mercedes or my money back. Thank you, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655541April 18, 2025
TIRES
I purchased four brand new "GoodYear" tires with this location in February 2024. Within two months of this purchase, I experienced two flat tires in which both times I had to pay $87 and some change. Addtionally, within a year, two of the tires became bald, indicating premature wear. Tragically, this month, the bald tires contributed to a car accident, resulting in damages of my vehicle and loss of time from work. This incident has caused significant distress and has raised serious concerns about the quality of the tires and the services provided from this location. I have attempted to resolve this matter directly with the service center and cooperate office. To this day, no adequate response has been addressed to resolve my concerns. I'm glad to live to be able to tell my story and advocate for others!!! Tire Size 255/50R19`
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11652759April 4, 2025
FUEL SYSTEM, DIESEL, FUEL SYSTEM, GASOLINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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