2018 Mercedes-Benz GLS-Class: owner complaints and recalls
Analysis of 22 owner complaints filed with NHTSA and 0 recall campaigns. Updated 2026-07-25.
22
Complaints
0
Recalls
1
Crash reports
3
Fire reports
0
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 |
|---|---|---|
| SERVICE BRAKES | 5 | 22.7% |
| SUSPENSION | 4 | 18.2% |
| UNKNOWN OR OTHER | 4 | 18.2% |
| ELECTRICAL SYSTEM | 3 | 13.6% |
| ENGINE | 2 | 9.1% |
| STRUCTURE | 2 | 9.1% |
| POWER TRAIN | 2 | 9.1% |
| FORWARD COLLISION AVOIDANCE | 1 | 4.5% |
The single most-reported system is SERVICE BRAKES, cited in 5 of 22 complaints (22.7%). One complaint can name several systems, so these shares overlap and do not total 100%.
Complaints filed per year
| Year | Complaints |
|---|---|
| 2018 | 6 |
| 2020 | 3 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 1 |
| 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.