The contact owns a 2015 Mercedes-Benz C300. The contact stated while washing the vehicle, he observed that the roof panel had become detached. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 21V197000 (Structure), but the VIN was not included. The manufacturer was notified of the failure but referred the contact to the NHTSA Hotline for assistance. The failure mileage was 90,000.

- Rockville, MD, USA

The contact owns a 2015 Mercedes-Benz C300. The contact received notification of NHTSA Campaign Number: 23V854000 (Structure) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated while driving 50 MPH, the panoramic plastic piece suddenly detached from the vehicle. The location where the piece was attached was fractured allowing wind and water to leak inside the vehicle. The dealer was contacted. The manufacturer was made aware of the issue. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was 103,000. VIN tool confirms parts not available.

- Rincon, GA, USA

The contact owns a 2015 Mercedes-Benz C300. The contact stated that while the vehicle was at the dealer for routine service, a corrosion inspection was performed. The contact was informed of a rust hole in the sub frame. The vehicle was not repaired. The manufacturer was made aware of the failure and advised the contact to report the failure to the NHTSA Hotline. The failure mileage was approximately 76,000.

- Loveland, OH, USA

The contact owns a 2015 Mercedes-Benz C300. The contact stated while driving at approximately 65 MPH, she heard a rushing air sound as if the sunroof was opened; however, the sunroof was not open. The contact stated that when she reached her destination, she noticed there was a panel missing from the roof between the sunroof and the windshield. The contact had not taken the vehicle to a local dealer or independent mechanic. The vehicle had not been diagnosed or repaired. The manufacturer had been informed of the failure. The contact researched online and related the failure to NHTSA Campaign Number: 21V197000 (Structure). The failure mileage was approximately 100,000.

- Wittmann, AZ, USA

The contact owns a 2015 Mercedes-Benz C300. The contact stated while driving 60 MPH, there was an abnormal wind sound coming into the vehicle. After a visual inspection, the contact noticed that the glass was detaching from the panoramic sunroof. The vehicle was towed to the dealer, who determined a failure with the adhesive. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 21V197000 (Structure) however, the VIN was not included. The manufacturer was notified of the failure but referred the contact to the NHTSA Hotline for assistance. The failure mileage was 51,150.

- Durham, NC, USA

Front stationery panel fail off whole driving I see it is in recall but do not see my VIN how can I get this fixed per recall

- Kingwood, TX, USA

The contact owns a 2015 Mercedes-Benz C300. The contact stated while driving 45 MPH, the roof carriage started shuddering. The contact veered to the side of the road. Upon inspecting the vehicle, the contact noticed that the roof panel had loosened. The contact stated continued driving and the roof panel fractured and partially separated from the vehicle. The vehicle was taken to an auto glass repair shop, where the roof panel was replaced; however, the failure reoccurred. The vehicle was taken back to the same auto glass repair center. The contact then became aware of NHTSA Campaign Number: 21V197000 (Structure) that he related to the failure. The dealer and the manufacturer were notified of the failure and informed the contact that the VIN was not included in the recall. The vehicle was not repaired. The failure mileage was approximately 85,000.

- Redwood City, CA, USA

The contact owns a 2015 Mercedes-Benz C300. The contact received notification of NHTSA Campaign Number: 21V197000 (Structure) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

- Ensenada, 00, USA

The contact owns a 2015 Mercedes-Benz C300. The contact stated that there was a crack on the front panel of the panoramic roof. The contact had not taken the vehicle to a local dealer or independent mechanic to be diagnosed or repaired. The contact researched online and found that the roof panel was included in NHTSA Campaign Number: 21V197000 (Structure). The manufacturer had been informed of the failure and the contact was informed that the VIN was not included. The failure mileage was approximately 50,000.

- Baltimore, MD, USA

The contact owns a 2015 Mercedes-Benz C300. The contact stated while driving 50 MPH, the contact heard an abnormal flapping sound coming from the opened panoramic moon roof. The contact reached up into the open moon roof and discovered that the adhesive bonding on the front panel had started to deteriorate. The contact took the vehicle to the local dealer and was confirmed the failure however, the contact was informed that the dealer was not equipped to perform the repair. The contact was referred to Mercedes-Benz of Wilkes-Barre (150 Motorworld Dr, Wilkes-Barre, PA 18702) where the mechanic removed the bonded panel and installed a new front panel which the contact paid for out of pocket. The first dealer then notified the contact of NHTSA Campaign Number: 21V197000 (Structure) and instructed him to call the dealer where the vehicle was repaired. The second dealer was notified of the failure and informed him to call the manufacturer for potential reimbursement. The manufacturer was notified of the failure and informed him that the vehicle was not included in the recall. The vehicle was repaired. The failure mileage was approximately 68,000.

- Endicott, NY, USA

The contact owns a 2015 Mercedes-Benz C300. The contact-??s wife stated while driving 70 mph, the roof panel separated and detached from the vehicle. The vehicle was diagnosed but not repaired. Upon investigation, the contact associated the failure with NHTSA campaign number: 21V197000 (Structure) however, the part to do the recall repair was not yet available. The manufacturer was informed of the failure but offered no assistance. The failure mileage was approximately 57,000.

- La Jolla, CA, USA

The contact owns a 2015 Mercedes Benz C300. The contact received notification of NHTSA Campaign Number: 21V197000 (STRUCTURE) however, the part to do the recall was unavailable. The contact stated on June 18, 2021, while driving 55 mph, the roof plastic panel detached and flew into oncoming traffic. The contact stated no one was injured. The contact called the local dealer and was informed that the part was not available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure. The failure mileage was approximately 59,000. VIN tool confirms part not available.

- Simsbury, CO, USA

The contact owns a 2015 Mercedes-Benz C300. The contact stated that the sun roof ceased in the open position. The contact stated that the adhesive on the paneling had deteriorated which caused the sun roof to lose functionality. The vehicle was not taken to the local dealer. Upon investigation, the contact associated the failure with NHTSA Campaign Number: 21V197000 (STRUCTURE) however, the vin was not included. The manufacturer was informed of failure and informed the contact that the vehicle was not included in the recall. The failure mileage was approximately 61,000.

- Little Elm, TX, USA

I receive warning after I pass 5 mph speed if any of the passenger doors or trunk is open. The car needs to notify me as soon as it goes into drive mode. Manufacturers response has been quoted below. "we tested a C300 here. If the driver door is open, there is an immediate message when the vehicle is put in gear (forward or reverse). However, all other doors receive a message at approximately 5 mph. Mercedes-Benz recommends that the driver make sure all passengers are in seatbelts and the doors are secured. "

- Tarzana, CA, USA