2021 Mercedes-Benz GLS-Class: owner complaints and recalls
Analysis of 36 owner complaints filed with NHTSA and 0 recall campaigns. Updated 2026-07-25.
36
Complaints
0
Recalls
2
Crash reports
2
Fire reports
2
Injuries
100.0
Severity index
Severity index 100.0 - High. This weights crashes, fires, injuries and fatalities per 100 complaints; see methodology.
What actually fails
| Component | Complaints | Share of complaints citing it |
|---|---|---|
| ELECTRICAL SYSTEM | 16 | 44.4% |
| UNKNOWN OR OTHER | 8 | 22.2% |
| ENGINE | 4 | 11.1% |
| LANE DEPARTURE | 3 | 8.3% |
| FORWARD COLLISION AVOIDANCE | 3 | 8.3% |
| FUEL SYSTEM | 2 | 5.6% |
| GASOLINE | 2 | 5.6% |
| SEATS | 2 | 5.6% |
The single most-reported system is ELECTRICAL SYSTEM, cited in 16 of 36 complaints (44.4%). One complaint can name several systems, so these shares overlap and do not total 100%.
Complaints filed per year
| Year | Complaints |
|---|---|
| 2021 | 4 |
| 2022 | 11 |
| 2023 | 8 |
| 2024 | 8 |
| 2025 | 4 |
| 2026 (year to date) | 1 |
Complaint volume is broadly steady year over year.
Source. US National Highway Traffic Safety Administration public complaint and recall APIs (api.nhtsa.gov), retrieved 2026-07-25. Complaints are unverified consumer reports; volume is influenced by how many units were sold and how long the vehicle has been on the road. Not affiliated with NHTSA or any manufacturer.