Mercedes-Benz GLS450 problems by year
64 owner complaints filed with NHTSA across 3 Mercedes-Benz GLS450 model years. Last verified Aug 8, 2026. Complaint totals are lifetime counts — years that have been on the road longer accumulate more reports.
| Year | Complaints | Recalls | Most reported problem | |
|---|---|---|---|---|
| 2021 | 30 | 12 | Electrical System | |
| 2019 | 4 | 2 | — | |
| 2017 | 34 | 8 | Electrical System |
How to read this. Complaints are unverified reports owners file with NHTSA’s Office of Defects Investigation, counted once per case number. Raw totals are not adjusted for sales volume, and recent model years have had less time on the road. “Most complained” flags years well above the model’s median; treat it as a signal for deeper research, not a verdict. This page is not affiliated with Mercedes-Benz.