*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Engine
Car fails to accelerate past 25 mph when entering roadway. Roadway area is 45mph and vehicle would not accelerate to reach safe levels. This out myself and occupants of my vehicle in danger as traffic is already at the 45+ mph limit. Vehicle has 30,000 miles. Engine light came on after incident.
May 14, 2026Forward collision avoidance › Automatic emergency brakingCrash
Refer to Mercedes Complaint letter dated August 21, 2025. Refer to EDR report of the crash Mercedes Benz is claiming no responsibility for the failure of Active Brake Assist (ABA) during a frontal impact collision that resulted in the car total loss. The sensors also didn't work resulting in no alert to the driver and nothing recorded on the car camera system.
May 17, 2025Fuel/propulsion system
1. The vehicle experienced a fuel injector failure, which is part of the engine fuel delivery system. This failure appears connected to an open Fuel System Control Unit Software Update Recall (Campaign 2024080006) that has been open since May 2024 but was not performed on my vehicle, despite the vehicle being serviced at the dealership in January 2025 for other recall-related updates. The failed injector is still available for inspection upon request. 2. The vehicle began exhibiting symptoms of fuel system malfunction while driving, including rough idling, hesitation, and loss of power. A malfunctioning injector can cause the engine to misfire, stall unexpectedly, or run unpredictably,…
Oct 4, 2025Seat belts
Passenger seat belt doesnât lock properly sometimes comes out and is very hard to put in on entry of vehicle
Mar 24, 2025Back over prevention › Sensing system › Camera
All on a sudden the entire screen goes blank. It has happened at least 4 times and each time the service center does some patching and it works for a few month. When it happens, all the safety features are off including reverse camera. Also, no way to set the temperature or turn of the AC. In both cases, it can lead to significant damage. The recent incident happened when I was a very busy area and without any safety feature, the car was pretty much un-drivable.
Feb 18, 2025Back over prevention › Warnings
When starting vehicle, center screen of vehicle was completely off and dark. Moreover, with this screen being off, you are not able to control any of the vehicle functions such as AC, Maps, Radio, Rear Camera, etc. On the other hand, on the digital speedometer screen, a warning message states "Blind Spot Assist Inoperative" and when putting the vehicle in gear, a loud beep sounds within the car and then the next warning message appears that states, "PARKTRONIC" inoperative see owners manual"
Dec 1, 2024Electrical system
The electronic system, specifically the battery, failed and it is available for inspection upon request. The persistent battery drain caused the vehicle to become inoperable multiple times, including an incident where I was stranded 200 miles from home with my wife and dog, posing significant safety risks. Yes, the defect has been confirmed by the dealershipâs service center multiple times. The vehicle has been inspected by the dealershipâs service technicians. Yes, the first malfunction message appeared on [XXX] at 2:22 PM, a week after purchase. Multiple warning messages have appeared since then, including transmission malfunction, running lights malfunction, high beams malfunction,…
Jun 2, 2024Structure › Body › Door
The contact owns a 2022 Mercedes-Benz C300. The contact stated that while the vehicle was parked, the contact became aware that the seal had detached from the driverâs side front door. The contact stated that due to the failure, water entered the driverâs seat causing a short circuit in the electrical system. The vehicle was taken to a dealer and was determined to be a manufacturing defect. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline. The vehicle was not repaired. The failure mileage was approximately 6,000.
Apr 23, 2024 · 6,000 miles
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.