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2017 Mercedes-Benz GLC 300: seat belt won't latch or retract

6 of the 102 complaints about the 2017 Mercedes-Benz GLC 300 describe seat belt won't latch or retract.

owner complaints
6
of this car's complaints
6%
recalls
3
Is there a fix? There are 3 recalls for this area of the car. See below

Seat belt won't latch or retract by model year

  • 2025
    1
  • 2023
    2
  • 2020
    1
  • 2019
    1
  • 2018
    6
  • 2017
    6
  • 2016
    2

What owners say

Filed Feb 3, 2026 · Seat belts · 71,000 miles · TX

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while parked and attempting to release the seat belt, the seat belt remained latched. The contact stated that after the third attempt, the seat belt operated as needed. The failure had occurred in the front driver’s and passenger’s side seat belts. The vehicle was taken to a dealer, where it was determined that the buckle and needed to be replaced. The seat belt buckle was replaced, and the vehicle was repaired. The manufacturer was notified of the failure but offered no assistance because the warranty had expired. The approximate failure mileage was 71,000.

Filed Jun 4, 2025 · Airbags, Seat belts · VA

No incident my vehicle has a front left malfunction service required light and issues with the passenger seatbelt not proper latching. Upon checking I notice my car had previous recalls done. It seems as if the same issues has come about. the federal safety agency: 18v177- seat belt not retracting properly. the federal safety agency: 17V627 is related to the steering column switch replacement of clock spring. So if me or a family member was to get into an accident no airbag will deploy! Huge safety hazard!

Filed Jun 2, 2025 · Airbags, Seat belts · 120,000 miles · VA

The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while driving on several occasions at various speeds, the front passenger’s side seat belt retractor failed to extend or retract as intended and became stuck. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. Additionally, the contact stated that on several occasions while started and running, the message “Service Soon” was displayed. The vehicle was taken to a dealer where it was diagnosed and determined that the clock spring needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 120,000.

Filed Nov 28, 2023 · Seat belts · PA

The seat belt latch in the second seating row, the outboard seatbelt latch plate retracted into the area between the c-pillar paneling and the rear side paneling. The rear occupant was not be able to fasten the seat belt latch. The latch plate retracted behind the panel and the seat belt for the affected rear seat was not be available for fastening. I was able to grab the latch plate with a pliers and bring it out from behind the panel but I am afraid this situation will occur again. I checked my VIN against you checker and it says NO RECALL is pending. I assume MB did not include this VIN in its report to you or falsely claimed the vehicle was repaired. reference # 2018030012, May 2018

Filed Sep 30, 2022 · Seat belts · TX

While driving vehicle, the seat belt pretensioner is activated and the seat belt light and alarm is activated. This cycle occurs throughout the drive, regardless of speed. Seems as though the seat belt latch does not sense that the seat belt is activated. This is very distracting to the driver. We reported the issue to the dealership, but have not heard anything since the report. This problem occurs on and off, randomly. May occur for a week straight, then stop for a day or two, then start again.

Filed Jun 23, 2022 · Seat belts · AL

Whilh e driving with a passanger in the front seat, and properly buckeled up. The passenger seat belt will randomly tighten up and the seat belt light will flash on the dashboard and the seat belt audible bell will sound, this will last for a few minutes and then stop for a few minutes then start again. I went to the dealer and got the earliest appointment to get it fixed which is over 30 days away (7-26-22), I asked was it still safe to drive the SUV and was told tmhey belived it was ok because it sounded like a seatbelt latch issue, I have discivered there is a recall for this problem but not my model year

Related recalls

Seat belts: rear/other: buckle assemblyReported October 1, 2018 · 4,702 vehicles affected
What is wrong
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2016-2018 Mercedes-Benz GLC300 and GLC300 4Matic, 2018 GLC350e and GLC63 AMG 4Matic and 2017-2018 GLC43 AMG 4Matic vehicles. The seat belt latch plates (the parts that insert into the buckles) for the outboard rear seats may retract into the interior paneling, preventing the occupants from being able to use the seat belts.
Risk
If the rear seat passengers cannot fasten their seat belts, they have an increased risk of injury in the event of a crash.
Remedy
MBUSA will notify owners, and dealers will install felt strips between the C-pillar and rear side paneling, free of charge. The recall began November 2, 2018. Owners may contact MBUSA customer service at 1‑800‑367‑6372. MBUSA's number for this recall is 2018100002.

Recall number 18V683000 · Recall details

Seat belts: rear/other: buckle assemblyReported March 15, 2018 · 121,858 vehicles affected
What is wrong
Mercedes Benz USA LLC (MBUSA) is recalling certain 2017-2018 GLC43 AMG, 2016-2018 GLC300 4Matic, 2016-2018 GLC300, 2018 GLC63 AMG 4Matic, and 2018 GLC350e 4Matic vehicles. The seat belt latch plates (the parts that insert into the buckles) for the outboard rear seats may retract into the interior paneling, preventing the occupants from being able to use the seat belts.
Risk
If the rear seat passengers cannot fasten their seat belts, they have an increased risk of injury in the event of a crash.
Remedy
MBUSA will notify owners, and dealers will install a buffer to the c-pillar paneling, free of charge. The recall is expected to begin May 14, 2018. Owners may contact MBUSA customer service at 1‑800‑367‑6372. MBUSA's number for this recall is 2018030012.

Recall number 18V177000 · Recall details

Seat belts: pretensionerReported April 11, 2017 · 12,743 vehicles affected
What is wrong
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017 C300, C300 4Matic, C300 Coupe, C300 Coupe 4Matic, C43 AMG, C43 AMG Coupe, C43 AMG Cabrio, C63 AMG, C63 AMG Coupe, C63S AMG, C63S AMG Coupe, C63S Cabrio, GLC300, GLC300 4Matic, GLC43 AMG, S550, S550 4Matic, S550e, S600, S63 AMG 4Matic, S65, Mercedes-Maybach S550 4Matic, and Mercedes-Maybach S600 vehicles. The affected vehicles have front seat seatbelt pretensioners that may not function properly in the event of a crash. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 208, "Occupant Crash Protection," and 209, "Seat Belt Assemblies."
Risk
If the front seat seatbelt pretensioners do not function properly, the seat occupants may not be adequately restrained in the event of a crash, increasing the risk of injury.
Remedy
MBUSA will notify owners, and dealers will replace the front seat belts, free of charge. The recall began October 13, 2017. Owners may contact MBUSA customer service at 1‑800‑367‑6372.

Recall number 17V251000 · Recall details

Questions about the 2017 Mercedes-Benz GLC 300 seat belt

Is seat belt won't latch or retract a common problem on the 2017 Mercedes-Benz GLC 300?

6 of 102 owner complaints about the 2017 Mercedes-Benz GLC 300 (6%) mention seat belt won't latch or retract. The model year with the most reports is 2017.

Is there a recall or service bulletin for this on the 2017 Mercedes-Benz GLC 300?

There are 3 recalls and 0 service bulletins for the same area of the car. Check them below with your VIN.

Other symptoms on the 2017 Mercedes-Benz GLC 300

Check engine light 19Fuel smell 6Engine failure 5

All model years of the Mercedes-Benz GLC 300

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