MERCEDES-BENZ Complaints

Mercedes has not provided any remedy for NHTSA Recall Number26V073. We have written the following email on April 26, 2026 but have not received any reply. Please find attached letter we have written to Mercedes.

Strong fu Smell after filling tank recently. Checked under the passenger side rear seat and there is some fuel on the top of tank. Local mechanic confirmed and mentioned not to fill tank more than half. Requires replacement of fuel tank to fix it

To Whom It May Concern: I am submitting this complaint regarding my 2020 Mercedes-Benz GLE 350 and respectfully requesting review of a serious infotainment and electronic system failure that occurred at approximately 49,000 miles. Prior to the failure of the MBUX infotainment system, the vehicle began exhibiting abnormal electrical behavior. On multiple occasions, the right headlight remained illuminated even after the vehicle had been completely turned off and locked. The only temporary way to resolve this was to restart the vehicle and shut it down again. Shortly afterward, the vehicle displayed warnings indicating that the 12V battery was very low and required charging. Soon after these electrical issues appeared, the MBUX infotainment system became stuck on the Mercedes-Benz startup logo screen and has remained nonfunctional since. Although the backup camera still partially functions, the infotainment system itself will not boot properly or operate normally. The authorized Mercedes-Benz dealership documented the following diagnostic fault codes: • B14D913 – Internal hard disk malfunction/open circuit • B14F900 – Internal hard disk full According to the dealership service report, guided tests, MOST ring reset procedures, and hard resets of the control unit were all performed without resolving the issue. The dealership ultimately recommended complete replacement of the MBUX head unit at a very significant cost. This situation is especially concerning because the vehicle has relatively low mileage, has been properly maintained, and recently underwent Service B and 12V battery replacement through an authorized Mercedes-Benz dealership immediately after the battery warning appeared. A major infotainment head unit/internal storage failure at this mileage is not something we reasonably expected from a luxury vehicle. While researching this issue further, I discovered numerous online reports from other Mercedes-Benz owners — particularly owners of 2020–2023 GLE models —

We were traveling to our son’s college graduation, driving on a rural interstate and suddenly all of the vehicle’s warning lights lit on the dash and the car started losing, and then completely lost power. The car was no longer operational. We were stranded on the roadside of a remote but busy 2-lane interstate for 2 hours until a tow truck could arrive and take the car to the closest car repair shop which was 45 minutes away. This was an incredibly dangerous situation and we were fortunate to be alongside the shoulder, although we were still close to the tractor trailers and cars on the interstate. (Because we were stranded in such a remote place, we had no other options to get to our son’s graduation. We were unable to attend because of this.) The rural repair shop the car was initially towed to could not determine the problem. A few days later we found a 2nd tow truck that agreed to bring the vehicle several hundreds of miles back to our home city. This car is a 2020 model, and has around 55,000 miles. It has been meticulously maintained by a certified Mercedes mechanic. There were no issues with the car and no indication that there might be a problem. Our mechanic has thoroughly inspected the vehicle and said that the engine has completely seized and the only option is to replace it. We have no idea why this happened. If requested, the vehicle is available for inspection.

When driving 75mph in order to change my favorite radio station, I must go to the center tablet, scroll until I find the station desired and then must tap it in the center or it does not change. On my 2025 MB C model you could change the channels on the steering column. I asked MB to research this issue and I was told a third party wrote the 2026 software and did not include this option! Is it not a safety concern that when doing 75 mph you must take your eyes off the road to find and change a radio channel? No One cares at MB and I was told that I need to live with it !! Really that is the solution??

The contact owns a 2023 Mercedes Benz EQB 250. The contact received notification of NHTSA Campaign Number: 26V073000 (Electrical System) however, the part to do the recall repair was not yet available. The vehicle was taken to the dealer and the dealer was contacted. The vehicle was not diagnosed or repaired. The dealer confirmed that the remedy parts were not yet available. The manufacturer was made aware of the issue. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated their concern. The contact stated that the vehicle is unsafe and hazard to drive for the contact daughter and other passenger The contact had not experienced a failure.

I am reporting a serious safety defect in my 2019 Mercedes-Benz GLS450. My vehicle experienced low oil pressure warnings and engine warning lights, which were diagnosed as a faulty oil pump solenoid valve. The repair required removing major engine components, resulting in a cost of $5,000 that I paid personally. It is important to note that Mercedes-Benz updated the valve design in the following model year, indicating that the company was aware of a defect in the original design. This demonstrates that the failure is recurring and not isolated, creating a serious safety risk—low oil pressure can lead to catastrophic engine failure while driving, endangering the driver and passengers. I request that NHTSA: Document this as a potential safety defect. Investigate the prevalence of this issue. Consider initiating a recall or safety notice for affected GLS450 vehicles.

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.

Mercedes-benz usa. llc (mbusa) is recalling certain 2014-2020 c-class, cla, gla, s-class. glc, and gle vehicles. please refer to mbusa's recall report for specific vehicle details. the front roof panel located between the windshield and the panoramic sunroof may not have been bonded correctly to the vehicle during a prior repair, allowing the front panel to detach from the vehicle., Consequence A detached roof panel can become a roao hazard, increasing the risk of a crash I went to the dealership about this complaint 2 years ago not even knowing about an official recall of this exact problem. I don't drive my car as much because it was an issue that never got fixed. I was never told about a recall. They said there is a whistling and it could fly off (the panel)

NHTSA Safety Complaint – 2016 Mercedes-Benz C300 Vehicle: 2016 Mercedes-Benz C300 | Mileage: 74,662 miles What Happened I’m filing this complaint because my 2016 Mercedes-Benz C300 suffered a sudden, complete engine failure at 74,662 miles, and I believe it’s a safety risk that deserves investigation. I’ve owned this car since 2016 and followed every recommended service interval. All available warranties were purchased and maintained. The car showed absolutely no signs of trouble before this happened. Last week before filing, I was driving normally when the check engine light came on without any prior warning — no oil pressure light, no temperature alert, nothing else. Within minutes, the engine shut off completely. The car rolled to a stop and I noticed oil leaking from the front of the engine. It was towed to an authorized Mercedes-Benz dealership, where they confirmed the engine suffered a catastrophic internal failure and needs to be fully replaced. Why This Is a Safety Concern No advance warning. The check engine light appeared only minutes before the engine died. That’s not enough time to safely exit a highway or busy road. A sudden total engine failure at speed affects steering, braking assist, and reaction time — it could easily cause a serious accident. Engine failure at 74,662 miles is not normal. A complete engine failure on a well-maintained luxury vehicle at under 75,000 miles strongly suggests a manufacturing defect or design flaw, possibly affecting other vehicles of the same model year. Oil leak at engine front. The leak observed at failure likely points to a specific component or seal failure. If this is a design weakness, other 2016 C300 owners may be at risk without knowing it. What I’m Requesting 1.Open an investigation into the 2016 Mercedes-Benz C300 for sudden engine failure and inadequate warning systems. 2.Determine whether other owners have reported similar incidents. 3.Evaluate whether a safety recall is warranted.