When driving on the highway going 65mph the car slipped in neutral and error showed on dashboard "transmission malfunction stop." I could steer and break, but not accelerate. Pulling over on side of highway, I was able to put in park and then drive. I pulled off the exit and the car did the same thing within 10 mins. Car was towed to Mercedes dealership in Warwick, RI. I was made aware after inspection that there was nothing wrong with the vehicle nor the transmission, but rather there was a needed software update that was causing the issue that had been identified previously. Regular service was due, but no indication whatsoever of the error I saw nor any other error codes. No error showed up for the technicians in inspecting the car. I was further informed, after research, that the software update was being drafted and that it would have to pass NHTSA governance. So I'd like to know if this is accurate? If NHTSA is aware? If the software update is sitting with you for approval? What is Mercedes obligation to share this with drivers noting they were aware of issue? If my [XXX] was driving she could have been killed. If I was accelerating on the highway or turning in front of a vehicle legally, I could have been killed. Thank you. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Source: NHTSA complaint ODI #11727263 · view all complaints for this vehicle at nhtsa.gov

Despite maintaining the vehicle according to the recommended schedule, I have encountered ongoing performance issues (electrical, rear shocks, fan motor etc.) that are not in line with the standard of quality I expect from a brand of your reputation. Window not going down all the way on the driver side. Radio not working but was fixed. These issues have caused inconvenience and concern regarding the reliability of the vehicle. To address my concerns, I spoke with a Mercedes-Benz representative who informed me that, due to the problems I’ve experienced, I may be eligible for either an extended warranty or a credit toward the purchase of a new vehicle. After careful consideration, I opted for the extended warranty. However, I was later informed that this option had not been approved—despite it initially being presented as available. This contradiction is both confusing and frustrating, and it has significantly diminished my confidence in the customer service process.

Source: NHTSA complaint ODI #11668913 · view all complaints for this vehicle at nhtsa.gov

Brake over heats because of rust caused by rain which builds up causing brakes to freeze up. Explanation from dealer. In fact told us we need to dry brakes off if we drive in rain and park in garage for more than 2 days or we will have it happen again. Brakes freeze and car locked up and can’t move it. We bought the car used had it inspected by a MBD in Atlanta G. Bulkhead , told breaks were like new. Mileage 23,666 miles. Put on about 4000 miles now brakes gone froze up from rain. Garage kept. While driving car we were noticing almost like the breakers were on but not stepping on break. A pulling like action. Seemed like emergency brake was on. Car at dealership now in Greenville SC Mercedes Benz dealer.

Source: NHTSA complaint ODI #11680547 · view all complaints for this vehicle at nhtsa.gov

According to a MB USA representative, the warning light instructing me not to drive over 50 miles per hour was related to my suspension. In addition to the warning light, I have repeatedly expressed my concerns about a loud creaking noise coming from the wheel area while driving, turning the corner, pulling in and out of driveway, etc. However, South Bay Mercedes is never able to duplicate the noise or identity the warning. I have also contacted MB USA on multiple occasions and they confirmed that I have three (3) open cases, but refuse to provide me with the case number and fail to respond as stated during each call. The suspension warning light has been coming on, intermittently, a few months after I purchased the vehicle and South Bay Mercedes only suggested a tire change and service appointments while blatantly disregarding the problem. Now I am getting a warning light that states, Service Required Do Not Shift Gears Visit Dealer. I have had this car less than a year as it was purchased brand new, and South Bay Mercedes/MB USA have been giving me the runaround for months; only corresponding to schedule upcoming service appointments. I have since changed my front tires, but continue to get warning messages. I have repeatedly expressed concerns about my safety and never received a response from MB USA.

Source: NHTSA complaint ODI #11508462 · view all complaints for this vehicle at nhtsa.gov

Parked the car not far from home, when my boyfriend got out and shut the door, the sunroof completely imploded. Tempered yet sharp shards were everywhere including my mouth, hair and body. MB took no responsibility and wound even have the car towed. Roof was repaired via my car insurance including private towing. MB wanted nothing to do with me. I do know that this has been a serious problem all over the country for some time. Please advise.

Source: NHTSA complaint ODI #11562442 · view all complaints for this vehicle at nhtsa.gov

All advance driver assistance system has a 50% work fail reliability. It may work it may fail to work, I bought the cat from a Mercades Dealer in Las Vegas with 48 miles on it. The vehicle has approx 900 now. The driver assist system fails daily, it is unreliable, dangerous and a hazard to occupants and others. It needs to be inspected and repaired, recalled.

Source: NHTSA complaint ODI #11569682 · view all complaints for this vehicle at nhtsa.gov