Repeated Panoramic Sunroof failure: sun roof rails are have been reported by the dealer to fail / crack and allow panoramic sun roof to dislodge from tracks securing this structure to the vehicle. NOTE THIS IS NOT RELATED TO/ADDRESSED BY THE PREVIOUS RECALL Loud cracking noises heard and the sunroof stuck in an open position and appeared at risk of departing the vehicle on initial occurrence 2019/2020 Dealer attempts to repair resulted in replacement of the rails which are reportedly "made of plastic and do not hold up well in southwestern US temperatures/climate" Repairs/rigging the system appears to "load the rails" and dealer reported life limits can be as low as 10 cycles / 30 months This issue has occurred three times in the past 4 years 92k miles Improper closure/ cracked tracks could result in incomplete cabin security during a roll over and/or potential for the panoramic sunroof to depart the vehicle to become a threat to other traffic.

- Cave Creek, AZ, USA

Collision Assyt not operating, E brake engaged damage rear brakes and rotors

- Oklahoma City, OK, USA

Front panel glass of panoramic sunroof flew off the car as I was driving on the highway.

- Union City, NJ, USA

Sudden acceleration after pulling very slowly into parking space. Almost stopped. Car suddenly accelerated, jumped a curb from, went up an embankment and hit a tree. Was able to reverse and back down. It will take a month for body work. Notified Mercedes dealer. They will run diagnostics on Jan. 7.

- Pittsburgh, PA, USA

I hit a bear in Montana in my 2017 Mercedes C300 at 86mph and destroyed the front of my car. The seatbelts deployed and wrenched us into our seats and smoke came out of the front air vents but the airbags did not go off. On the dash the vehicles stated that the airbags in all 4 zones in the car malfunctioned and service is required. Mercedes is stating that the light is from a seatbelt error code but the dash did not say anything about SRS or seatbelts. I do not want to put my family back in the car and do not feel it should be repaired. Please see attached photos of the error messages on the dash. I do not know how I can hit something that hard and not have them deploy. Mercedes is doing an internal investigation but they have not given me the results of that and it has been over 3 weeks. Vehicle was in for a airbag recall not takata related on January of 2018 and this was supposed to have been repaired.

- Portland, OR, USA

The contact owns a 2017 Mercedes-Benz C300. While driving approximately 35 mph, the glass moon roof suddenly exploded, causing glass to enter the cabin of the vehicle. There were no injuries. The vehicle was taken to Mercedes-Benz of loveland (4040 byrd dr, loveland, co), but the cause of the failure was not determined. The manufacturer was not notified. The failure mileage was 9,000.

- Windsor, CO, USA