2021 Mercedes-Benz GLS 450 Seat belts Problems
- Complaints
- 1about this part
- Share
- 3%of 31 total for the year
- Median mileage
- 25,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the seat belts of the 2021 Mercedes-Benz GLS 450, 3% of the 31 complaints for this model year. Where a mileage was given, the median is 25,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The contact owns a 2021 Mercedes-Benz GLS450. The contact stated while driving 40 MPH, the vehicle in front made a sudden stop, causing the contact to make a sudden stop, causing the contact’s children to fall out the seats. The contact notice that the third-row buckle latch had malfunctioned. The vehicle was taken to the dealer and the third-row driver’s side latch was replaced. On another occasion while driving 40 MPH, the contact heard squeaking noise coming from the rear of the vehicle. …”
NHTSA complaint #11503432, filed 2023-01, 25,000 milesSeat belts: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2021 | 1 | 3% |
| 2017 | 1 | 3% |
Other parts of the 2021 Mercedes-Benz GLS 450
14 complaintsOther or unknown
8 complaintsEngine
3 complaintsLane departure
3 complaintsForward collision avoidance
2 complaintsSeats
2 complaintsFuel system
1 complaintsSteering
1 complaintsBody and structure
1 complaintsTires
1 complaintsTransmission and drivetrain
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2021 Mercedes-Benz GLS 450
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology