2017 Mercedes-Benz C300: seat belt won't latch or retract

Filed Nov 13, 2025 · Seat belts · 67,000 miles · IN

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 the federal safety agency 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 federal safety agency Hotline for assistance. The failure mileage was 67,000.

Filed Jun 12, 2025 · Seat belts · NY

The contact owns a 2017 Mercedes-Benz C300. The contact stated that both the front driver’s side seat belt and front passenger's side seat belt had failed to retract as needed. There was no warning light illuminated. Additionally, the contact stated that the seat belts buckles would unintendedly lodge under the seats. The vehicle was taken to the local dealer, but was not diagnosed or repaired. The contact related the failure to the federal safety agency Campaign Number: 21V032000(Seat Belts); however, the VIN was not included. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline for assistance. The failure mileage was unknown.Â

Filed Jul 10, 2024 · Seat belts · NJ

Part 573 Safety Recall Report 21V‑032 Manufacturer Name : Mercedes-Benz USA, LLC the federal safety agency Recall No. : Manufacturer Recall No. : JAN 29, 2021 21V‑032 NR Manufacturer Information : Manufacturer Name : Address : Mercedes-Benz USA, LLC Company phone : 1‑877‑496‑3691 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.

Filed May 14, 2024 · Airbags, Seat belts · CA · crash · 1 injury

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.

Filed Oct 30, 2023 · Seat belts · 8,000 miles · NJ

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 the federal safety agency Campaign Number: 21V032000 (Seat Belts) as a possible cause for the failure. The failure mileage was approximately 8,000.

Filed Aug 11, 2022 · Seat belts · 1,000 miles · CA

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 the federal safety agency Campaign Number 21V032000 (Seat Belts). The approximate failure mileage was 1,000.

Filed Jul 8, 2022 · Seat belts · WI

Issue: Front driver and passenger seat belts do not fully retract despite completed recall service. The seatbelts often "puddle" behind the seats when unbuckled, and sometimes get trapped between their seat and adjacent door. My car was recalled and serviced under Mercedes Campaign 2021020010 to fix this in October 2021. Also, the right front seatbelt was replaced in October, 2018 under Campaign 2017050023. The first paragraph of the Mercedes Recall Campaign Bulletin states, "...certain C-Class Cabriolet vehicles (A205 platform) with PRE-SAFE might not meet the requirements of FMVSS 208, S7.4.5., as the front seat belts might not fully retract to its stowed position. In this case, certain regulatory requirements under FMVSS 208 might not be fulfilled. If the seatbelt webbing does not fully retract into its stowed position, the consumer may find the operation of the seatbelt inconvenient and not wear it, increasing the risk of injury in the event of a crash." In its step 1, the bulletin states, "The seat belt strap must retract into its final position automatically. Provide manual assistance with rolling up the seat belt strap if necessary." Having to provide manual assistance to retract the seat belt does not meet the definition of "must retract into its final position automatically". Further, it does not meet the aim stated in the bulletin's first paragraph about the importance of the seat belt fully retracting. The labor time spent on campaign was only 0.10 hours (6 minutes), so nothing more than a cursory inspection was done, and not any actual service work. I spoke with my local Mercedes dealer and the Mercedes USA customer service rep. They are both Ok with manually feeding the seatbelt into its slot. This is unacceptable and does not meet FMVSS 208. Both the dealer and the Mercedes USA say I can pursue proper fix at my expense. This is a failed recall service and I should not have to pay to explore a proper remedy.

Filed Mar 31, 2022 · Seat belts · 22,000 miles · FL

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 the federal safety agency 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.

Filed Oct 28, 2021 · Seat belts · 2,500 miles · IN

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 the federal safety agency 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.

Filed Jul 20, 2021 · Seat belts · 20,000 miles · FL

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 the federal safety agency 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.

Filed Jul 8, 2021 · Airbags · CA · crash · 1 injury

I was in a car accident on June 30,2021. A Car collided into my drivers side at the front left wheel. My airbags did not deploy and i was injured. my injuries consisted of neck, shoulder, and lower back. I was also thrown to the passenger side of the vehicle because my seat belt did not seem to lock. Thank you, [XXX] email- [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

Filed Jan 7, 2021 · Seat belts · 20,000 miles · MA

Tl* the contact owns a 2017 mercedes-benz c300. The contact stated while starting the vehicle, the front seat belt pretensioner failed. Upon investigation, the contact associated the failure with the federal safety agency campaign number: 17v251000 (seat belts) however, the VIN was not included. The vehicle was not taken to the local dealer. The manufacturer was informed of the failure and informed the contact since the vehicle was not included in the recall, the vehicle owner was responsible for the cost of the repairs. The failure mileage was approximately 20,000. ## VIN passed ## mercedes-benz 2017 c300c4 ##