What 25 owners told NHTSA about the 2023 Mercedes-benz C-class Phev

The electrical wiring harness of my vehicle completely caught fire making my vehicle stopped working. Manufacture warranty refuses to acknowledge this as an ongoning issue with this models and forcing me to pay for my own repairs this is a danger to anyone driving this vehicle as the car entirely can be caught on fire at any given time.

NHTSA ODI 11596594

The above multiple problems/parts at issue. To include Other/I am not sure. Started at or approximately February 2023. The (Automatic Folding Side View Folding Mirrors before resolution) Malfunctioned 3 separate times before being fixed. During that time the (Cooling System Malfunction Reduced Drive Performance Service Required), displayed 2 separate Unknown Dates on the Dashboard Screen. The MB Dealership Service Diagnostic Check made was not Able to Detect the Trouble and was Never Fixed). On Monday, 08/21/2023, by (USPS) delivered a Mercedes Benz Official Letter Head Dated August 2023, stating that an (IMPORTANT SAFETY RECALL) for my Make and Model was issued. For the (Fuel Pump Impeller Module & Unfortunately, the Remedy is Not Yet Available). August 2023, the (Battery Voltage Level Percentage Warning Light) displayed 2 separate times. Then unknown dates, the front left driver's and right passenger's window were only going down by about 10-25% and up by about 90%, without completely closing. on 10/26/2023, the (Coolant System Malfunction Reduced Drive Performance Serviced Required) displayed. It has been at the Henderson of Mercedes-Benz Dealership to this date because knowing and understanding of the issues and unable to repair the problem. Additionally, being told the fuel pump recall parts not available until May of 2024. Monthly payments are still made, but the vehicle is not or cannot be driven due to the C-Class Sedan Operator's Manual on Pages 26-27, noting this could cause Crash, Injury and/or Death. I (FEAR FOR MYSELF, FAMILY, PUBLIC'S SAFETY & LIFE). The vehicle was brand new build and only has about 2,300 actual miles total. Reasonable time, due process has been given or allowed and being told it is unknown when or how all repairs will be fixed and still owning and not being able to drive the vehicle. Conclusion, I have loss all faith, trust and confidence in vehicle and if all will ever be fixed and (I WANT A TOTAL & FULL REFUND NOW).

NHTSA ODI 11555944

The contact owns a 2023 Mercedes-Benz C300. The contact stated while driving 50 MPH with the Intelligent Cruise Control activated, with no other vehicles or objects nearby, the vehicle inadvertently slowed down. After restarting the vehicle, the vehicle returned to normal functionality but later displayed the following messages: “Active Emergency Stop Assist Currently Unavailable”, and “Active Steering Assist Inoperable”. The Forward Collision Avoidance warning light was illuminated. The vehicle was taken to the dealer but not yet diagnosed. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 6,000.

NHTSA ODI 11544088

- December 5, 2022, while driving on I-20 East in Atlanta, Georgia in the evening, at a speed of 15-20 mph my vehicle abruptly came to a stop in the middle of traffic with no warning and no action prompted by me while driving. There were vehicles positioned in front and behind my vehicle. Thankfully, the vehicle behind me was able to slam on its breaks to prevent colliding into my vehicle. - April 7, 2023, while driving in southwest Atlanta in a residential area at a speed of 15-20 mph, while on the phone with one of my work colleagues, my vehicle abruptly stopped while driving past houses with no warning and no action prompted by me while driving. There was a vehicle positioned behind me that was able to slam on its breaks to prevent colliding into my vehicle. - May 5, 2023, while driving in a residential neighborhood on W Wesley Rd in Atlanta at a speed of 10-15 mph in a construction zone, my vehicle again abruptly stopped with no warning. This time, the stop was much more forceful than previous incidents. - May 5, 2023 my car received the following prompt on my screen "Your vehicle has detected a breakdown. Do you want to receive support from Mercedes-Benz Roadside Assistance" - Mercedes assessed my car and reported the following: C111A00 Radar sensor 1 is disrupted by interference from an external transmitter." Then, "NOTE PER OWNERS MANUAL, THE SYSTEM ON THE CAR CANNOT ALWAYS TAKE INTO ACCOUNT ROAD, WEATHER OR TRAFFIC CONDITIONS///BE AWARE OF THE LIMITATIONS REGARDING THE SAFE USE OF THE THESE SYSTEMS///" - The vehicle does not send an alert, forewarn, nor does it allow you to override an automatic emergency break - Mercedes Benz was flippant, dismissive and asked me to resume driving in an unsafe vehicle. I am filing this because they appear to have no regard for human life. I fear for my life and do not want to pass this burden on to someone else -In every instance described above, I contacted Mercedes Benz to make them aware. The contact is requesting to rescind the complaint and does not wish to move forward with the claim.

NHTSA ODI 11524034

First week, the car would take off fast as soon as the brakes were released. Then first time I used the heat there was a crackling sound coming form the side of the center display and it got extremely hot, I was on the FWY driving in the rain. Brakes: Intermittently, when braking, the car speeds up as if shifting to N, problematic in the FWY traffic behind another car, sometimes the brake pedal can be heard rattling really lose underfoot, brakes also used to groan when backing up. Electrical: intermittently, the door/trunk lock, side mirror, garage door opener do not work, and the dash displays change by themselves, the worst is the unreasonably hot center display that burns fingers, and becomes untouchable on hot days. Transmission: seems not to work in unison with the accelerator as sometimes the RPM needle hits 3-4 but the car will not speed up or is sluggish. Other: the car intermittently kicks, like being rear ended, it happens at different speeds and stopped or driving, continuing a few times intermittently for a day or two. Twice have taken the car to MBZ dealership, one for 2 days, another for 10 days, they said they reset everything and all was fine. The issues are intermittent and hard to duplicate for some one who does not drive the car regularly. The dealership has been great but I do not feel they are able to reveal the problems with the vehicle. The car is like a computer with a virus and sometime gives erratic response.

NHTSA ODI 11523001