The complaint is about the sunroof which has an open recall with all warning signs and risks exactly identical to my make, year and model (2016 mercedes benz c300). More than 15,000 vehicles have been affected by this problem and the warning signs suddenly appear with the vehicle. Mercedes Benz after their investigation after several reports were filed, later found that the sunroof glass panels were installed without prior application of the primer (bonding agent) which was supposed to ensure the specified strength of the bonded joint. NHTSA received several complaints concerning this issue where the sunroof suddenly began shaking and rattling which began with the driver noticing excessive wind noises in the area of the sunroof while driving indicating that the panel might be partially separated from the vehicle. I began noticing this on Tuesday May 28th, 2024, when my sunroof tilted open on the left side and failed to open properly. Upon closing it, I began to drive, and the wind noise and excessive rattling was immediately noticeable. It sounded like the wind was forcing open my sunroof and was almost like the wind was about to pull it out. In fear, I slowed down to about 20mph, but it was still very noticeable. I got scared and immediately pulled to the side of the freeway and parked. Then I immediately looked up the issue on google and noticed that there was an open recall for the exact same issue, for my make, model and year. It was noted that the roofs if not fixed will eventually pull out and flyaway posing a safety risk to the driver and other motorists who may crash as they try to avoid the debris or if the panel hits them. Luckily, I pulled over quicky out of fear for it felt like my sunroof was literally about to pull off by the wind. Now I am unable to drive my vehicle because of fear for my safety. Please I would appreciate if this were resolved and for my vehicle to be recalled and fixed immediately as soon as possible. Thanks.

- Apple Valley, CA, USA

The contact owns a 2016 Mercedes-Benz C300. The contact stated that the adhesive bonding on the front panel of the sunroof had failed, and the panel detached from the vehicle and the sunroof could no longer be opened. The cause of the failure was not yet determined, and the vehicle was not repaired. The manufacturer was contacted and informed the contact that the VIN was not included in NHTSA Campaign Number: 21V197000 (Structure). The contact stated that the vehicle had experienced the failure listed in the recall. The local dealer was not contacted. The failure mileage was 52,000.

- Port Ewen, NY, USA

The contact owns a 2016 Mercedes-Benz C300. The contact stated that the sunroof failed to open. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was approximately 65,000.

- Ellisville, MO, USA

The contact owns a 2016 Mercedes-Benz C300. The contact stated that upon purchasing the vehicle, the driver's side sunroof corner was slightly raised. The contact stated while driving at 40 MPH, she heard the panoramic sunroof glass sliding back and forth. The contact stated that she held the sunroof glass while driving. The contact stated that the failure had been reoccurring. Additionally, the contact stated while attempting to open the sunroof, it slightly opened and the force itself closed. The dealer was not notified of the failure. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline. The failure mileage was approximately 73,000.

- Holland, OH, USA

The contact owns a 2016 Mercedes-Benz C300. The contact stated the sunroof failed to close and was stuck open. The vehicle was taken to dealer and was diagnosed that the sunroof rail, motor and rods needed to be replaced. The vehicle was not repaired. The contact stated while driving at 15-20 MPH, she noticed that the sunroof was lifting up. The contact decreased her speed to 10-15 MPH and moved to the shoulder of the road. The contact stated that sunroof flew off and landed on the ground. The dealer was notified of the failure and informed the contact that the vehicle would be repaired at her own expense. The manufacturer was notified of the failure and informed the contact that they could not assist as the vehicle was out of warranty. The vehicle was not repaired. The failure mileage was approximately 82,000. The VIN was not available.

- Highland, NY, USA

The contact owns a 2016 Mercedes-Benz C300. The contact stated while driving 60 mph, the sunroof suddenly exploded and shattered. The contact stated she was able to pull over to the side of the road, where she inspected the vehicle and did not find the cause of the failure. The contact then drove the vehicle to her destination. The vehicle was taken to an independent mechanic who diagnosed that the roof panel needed to be replaced. The dealer was not notified of the failure. The manufacturer was made aware of the failure and declined to provide any assistance. The vehicle was not included in NHTSA Campaign Number: 21V197000 (Structure). The vehicle was not repaired. The approximate failure mileage was 32,000.

- Reston, VA, USA

On October 15, 2019 and on July 1, 2020 the glass panel which is located in front of the panoramic sunroof blew off the car while driving on the highway. This piece of glass does not move and became a dangerous projectile endangering other vehicles. I would guess the glue is not bonding properly

- Fort Myers, FL, USA

The contact owns a 2016 Mercedes-Benz C300. While driving approximately 65 mph, a loud noise suddenly occurred. The driver pulled over and discovered that the sun roof had erroneously shattered. There were no injuries. The vehicle was taken to the Mercedes-Benz of littleton (8070 South broadway, littleton, co) where it was diagnosed that the sun roof was faulty and needed to be replaced. The manufacturer was notified. The failure mileage was 34,000.

- Castle Pines, CO, USA

The contact owns a 2016 Mercedes-Benz C300. While driving 70 mph, the panoramic sun roof exploded. There were no injuries. The vehicle was taken to a local dealer (Mercedes-Benz of laguna niguel (1 star dr, laguna niguel, ca 92877) where it was diagnosed that a rock shattered the sun roof. The contact was advised to file a claim with the insurance company. The vehicle was not diagnosed or repaired. The manufacturer was notified of the issue and was performing a product investigation. The failure mileage was 10,000.

- Thousand Oaks, CA, USA