MERCEDES-BENZ Complaints

The vehicle previously underwent a sunroof recall repair; however, the repair appears to have been performed improperly. The sunroof seal was never replaced as required, which has resulted in ongoing water intrusion. The vehicle now shows two visible areas on the body with paint bubbling and surface rust consistent with water penetration and moisture retention caused by a failed or defective sunroof seal. The condition indicates long term exposure to water due to inadequate sealing following the recall service.

Vehicle: 2012 Mercedes-Benz C300 4Matic Sport Problem Component: Fuel / Propulsion System Safety Issue Description: My 2012 Mercedes-Benz C300 developed a serious fuel tank leak at approximately 106,460 miles which created overwhelming gasoline fumes and rendered the vehicle unsafe to operate. The gasoline fumes were extremely strong and entered the passenger area. The fumes were severe enough that I became physically overwhelmed from the gasoline exposure and discarded clothing due to gasoline contamination and odor. A local repair facility identified the leaking fuel tank. I was informed the replacement fuel tank was allegedly on extended backorder through Mercedes-Benz channels. Because the vehicle was unsafe to drive and replacement parts were allegedly unavailable for several months, I was forced to tow the vehicle from [XXX] to [XXX] at my own expense in order to locate a repair facility that could obtain a replacement fuel tank and safely repair the vehicle. The repair invoice states: “Installed used lt fuel tank incl switchover fuel pumps replace section of steel fuel line front of tank from lower braided line.” I am submitting this complaint due to: serious gasoline leak safety concerns, severe gasoline fume exposure, potential fire hazard, and the alleged extended unavailability of replacement fuel tanks. Mercedes-Benz USA Case Number: 22302114 INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2021 Mercedes Benz C. The contact stated that while driving on the highway, the vehicle began to lose power, riding rough. The check engine light illuminated. The vehicle was towed to the dealer where it was diagnosed with a fuel injection failure. The vehicle read diagnostic code P1CEF85. The manufacturer was made aware of the issue. The approximate failure mileage was 60,000.

Tire size 235/40 R20. Both front tires extremely worn in an uneven way with 1 having metal showing. Discout Tire in Lafayette, IN inpected and stated, "Lucky to be alive given how dangerous it is to drive on tires with metal exposed." Ordered new tires. Wouldn't even let us leave the parking lot due to safety. Used spare tire we carry to get home. Michelin denied the warranty claim due to improper servicing. No warning alerts. Vehicle was recently serviced by Mercedes of Lafayette on 3-34-26. Collected payment and handed my wife the key without volunteering ANY issue of ANY kind. Wife questioned if they even check the warning alert about brakes. Stated brake pads were in the yellow. Riding in the vehicle several days later, I noticed a loud road noise. Could not initially detect any obvious damage like a nail. Sound persisted. Stopped again. Turned steering wheel to expose the inner part of the tires. Zero tread and sharp metal exposed. Immediately took to Discount Tire. Confirmed OBVIOUS alignment issue causing uneven wear. Shocked Mercedes didn't fix the issue, and didn't alert us about the dangerous situation. Midas fixed alignment $122. Dealer & MB USA hq were notified. Neither made ANY effort to make things right in over 1mon. Dealer violated Indiana Code 9-19-18-3. Maker not doing proper quality control checks. Filing small claims court case about this issue as well.

 The contact owns a 2014 MERCEDES-BENZ E350. The contact stated while driving 60 MPH on the freeway, there was a popping noise coming from the sunroof and discovered it was shattered. The vehicle was not taken to the dealer or an independent mechanic for diganoses .The vehicle was not repaired The manufacturer was not notified of the failure. The approximate failure mileage was 108,000 .

I am submitting a safety complaint regarding my 2020 Mercedes-Benz GLE 350 due to what appears to be a significant air conditioning refrigerant leak. The vehicle rapidly loses refrigerant shortly after being recharged. When the system is operating, a loud seeping/hissing sound can be heard from the HVAC system area, followed by complete loss of cold air within a very short period of time. This issue appears to indicate a major refrigerant system failure and raises concerns about potential defects in the evaporator, condenser, hoses, or related AC components. The leak rate is excessive and ongoing. I am concerned this may be a broader manufacturing defect impacting other Mercedes GLE vehicles. The vehicle has been properly maintained, and the failure occurred under normal operating conditions. Given the frequency of similar complaints online involving Mercedes HVAC refrigerant leaks and evaporator failures, I believe this issue warrants investigation for a potential recall or manufacturer accountability. The failure impacts driver and passenger comfort and visibility in humid or high-temperature conditions due to inability to properly defog windows. I respectfully request that NHTSA investigate this issue for potential safety and defect trends affecting the 2020 Mercedes-Benz GLE platform.

CASE NUMBER: [XXX] VEHICLE: 2018 Mercedes-Benz GLE350 --- EMAIL EXCHANGE TEXT --- From: [XXX] Sent: 1/14/2026, 12:11 PM To: [email protected] Subject: Re: Message From Mercedes-Benz USA: Case Number [XXX] Dear Ken, I want to clarify that my concern is not about support for “older technology” in a general sense, but about the confirmed retirement of factory-installed emergency and crash-response systems that were standard safety equipment on my vehicle at the time of sale. As previously noted, the mbrace system on my 2018 GLE-Class includes SOS/Emergency Call and Automatic Collision Notification functionality intended to contact emergency services in the event of a crash or airbag deployment, particularly where the driver may be incapacitated. These are safety systems, not discretionary convenience features. Your replies confirm that these safety functions are being permanently disabled, that no retrofit or replacement solution exists, and that the vehicle will continue to operate without the emergency communication capability it was originally sold with. I appreciate your acknowledgment, and I am documenting Mercedes-Benz USA’s position that these safety systems have been retired with no alternative provided. Sincerely, [XXX] On Jan 14, 2026, at 09:02, Mercedes-Benz USA [email protected] wrote: Dear [XXX] , I’m very sorry that these older technology features have been retired. Mercedes-Benz is currently focused on supporting our present and next-generation technologies, which unfortunately means that the former mbrace system is no longer maintained. If you have any additional questions or concerns, I would be more than happy to assist. Best Regards, Ken C. Mercedes-Benz USA (800) 367-6372 Mercedes-Benz Customer Care, 1 Mercedes-Benz Drive. Sandy Springs, GA 30328 INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

every time I get into my vehicle, I have a new malfunction that pops up and when I take it to the dealership they can never find what’s wrong. I have had multiple instances where my screen will turn black and there’s nothing I can do or the screen will freeze, and I can’t figure out how to get it back on. I can’t figure out how to get CarPlay to automatically connect to my phone because the vehicle is so jacked up. It’s been in the shop probably about 13 times since I’ve gotten it last December and has been in collision for six months now from someone rear ending me. every time collision calls me to pick it up and says it’s fixed it’s not fixed.

The car would seem to shift when stopping , when tires were removed the rear subframe had rusted out completely, this is a major safety issue and could cause loss of control of the vehicle. The failure is the same as what the w204s experienced but they’re being fixed at the cost of Mercedes

This urgent safety issue with the high voltage battery on the 2022 Mercedes EQB has been known to Mercedes since at least July 2025. As of May 15, mercedes tells me I will have a repair scheduled by December 30, 2026. They offer no explanation for the delay. This is unreasonable and unacceptable. I am requesting that the NHSTA inform Mercedes that they must do better to eliminate this known fire hazard, and inform me of the penalties you can impose on Meercedes if they do not complete this recall in a timely fashion.