2017 Mercedes-Benz C300 Seat Belt Problems

Which parts fail

• Front › Retractor
  2
• Critical fasteners
  1
• Pretensioner
  1

Components named in complaints (buckles, retractors, anchors and pretensioners).

Mileage when the problem started

• Under 25k
  975%
• 25k–50k
  217%
• 50k–75k
  18%
• 75k–100k
  00%
• 100k–150k
  00%
• 150k+
  00%

Owner reports

Selected complaints filed with NHTSA by 2017 Mercedes-Benz C300 owners, lightly cleaned up (personal details are redacted by NHTSA).

The contact owns a 2017 Mercedes Benz C300. The contact stated that while making a left turn at 40 MPH, another vehicle crashed into the front passenger side of the vehicle. The air bags did not deploy upon impact and the seat belt also failed to restrain the contact during the crash. Due to both failures, the contact's head and chest hit the steering wheel. The contact was taken to the hospital by ambulance and given an X-ray exam. The contact was treated for lacerations to the forehead and suffered pain to the head, neck, back, and chest. The whereabouts of the other driver were unknown. A police report was filed. The vehicle was initially towed to an independent mechanic and later back to the contact's home where it remained in the contact's possession. Neither the dealer nor the manufacturer were notified of the failure. The vehicle was not repaired. The failure mileage was unknown.

The contact owns a 2017 Mercedes-Benz C300. The contact stated that the driver's and passenger's side front seat belts failed to retract completely upon release. Due to the failure, the seat belts would fall to the floor upon release from the buckle. The contact then received notification of NHTSA Campaign Number: 21V032000 (Seat Belts). The contact had taken the vehicle to the dealer and had the recall serviced however, upon return of the vehicle, the failure persisted. The contact was willing to supply the part but not the labor costs, he was informed that the retractor assembly needed to be replaced. The contact was informed that the seat belt retractors were not under recall. The contact was provided an estimate for the repair which he declined. Mercedes was notified of the failure. The vehicle was not repaired. The failure mileage was approximately 20,000.

The contact owns a 2017 Mercedes-Benz C300. The contact stated upon taking the front driver seat belt off she noticed, it was not fully retracting. There were no warning lights illuminated. The contact also stated that the front passenger's side seat belt was not fully retracting. The contact stated she received notification of NHTSA Campaign Number: 21V032000 (Seat Belts). The vehicle was taken to the dealer for recall repair; however, the dealer informed the contact that the seat belts did not qualify for the recall repair because the seat belts were fully retracting. The manufacturer was notified of the failure and informed the contact that they could not assist because the vehicle recall history did not show that the VIN had been included in the recall. The vehicle was not repaired. The approximate failure mileage was 2,500.

The contact owns a 2017 Mercedes-Benz C300. The contact stated that upon arriving at his destination and exiting the vehicle, the driver's side seat belt retracted and became stuck in the retracted position. As a result, the contact was unable to use the driver's side seat belt. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the seat belt assembly. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 21V032000 (Seat Belts), but the VIN was not included. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 67,000.

The contact owns a 2017 Mercedes-Benz C300. The contact stated the seat belt retraction failed. The contact stated the seat belt got stuck between the driver's door and the vehicle and she was unable to open the vehicle, so contacted the manufacturer's roadside service for assistance. The roadside service unjammed the door. The contact was unaware of the warning lights illuminated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The contact related the failure to NHTSA Campaign Number 21V032000 (Seat Belts). The approximate failure mileage was 1,000.

The contact owns a 2017 Mercedes-Benz C300. The contact stated while the vehicle was parked in the driveway, the driver's side seat belt failed to retract as designed. The contact stated that the seat belt was loose. There was no warning light illuminated. The vehicle was taken to the dealer to be diagnosed, but the vehicle was not yet diagnosed. The vehicle had not been repaired. The manufacturer was not made aware of the failure. The contact referenced NHTSA Campaign Number: 21V032000 (Seat Belts) as a possible cause for the failure. The failure mileage was approximately 8,000.

The contact owns a 2017 Mercedes-Benz C300. The contact stated that while operating the vehicle, the front driver's and front passenger's side seat belts malfunctioned and failed to properly retract. The cause of the failure was not yet determined. The local dealer and manufacturer were notified of the failure, but no assistance was provided. The contact was informed that the vehicle was previously serviced under NHTSA Campaign Number: 21V032000 (Seat Belts). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 48,956.

The contact owns a 2017 Mercedes-Benz C300. The contact stated that the seat belt latch plate failed to latch securely into the buckle of the seat belt while the contact was attempting to exit the vehicle. The contact referenced NHTSA Campaign Number: 21V032000 (Seat Belts). The vehicle was taken to the dealer to be diagnosed. The contact was informed that the latch needed to be replaced. The seat belt was repaired but failed to operate as needed. The manufacturer was notified of the failure. The failure mileage was 22,000.

The contact owns a 2017 Mercedes-Benz C300. The contact had received notification of NHTSA Campaign Number: 21V032000 (Seat Belts). The vehicle was taken to a local dealer and the recall repair was performed; however, upon retrieving the vehicle, the check engine warning light illuminated upon starting the vehicle. The vehicle was taken back to the dealer and remained in the dealer possession. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 34,000.

Part 573 Safety Recall Report 21V-032 Manufacturer Name : Mercedes-Benz USA, LLC NHTSA Recall No. : Manufacturer Recall No. : JAN 29, 2021 21V-032 NR Manufacturer Information : Manufacturer Name : Address : Mercedes-Benz USA, LLC Company phone : [phone] 13470 International Parkway Jacksonville FL 32218 Population : Number of potentially involved : Estimated percentage with defect : Vehicle Information : Vehicle 1 : 2017-2021 Mercedes-Benz C300 Vehicle Type : LIGHT VEHICLES Body Style : Descriptive Information : Power Train : GAS 2-DOOR Production Dates : Mercedes-Benz MY2017-2021 C300 18,589 vehicles. The recall population was determined through production JAN 19, 2016 - JUL 17, 2020 records. I was told this was not under recall when I found it is. The seat belt won't retract. Please advise.

Related recalls

Seat Belt complaints in other C300 years