2019 Mercedes-Benz GLS 450 vs 2020 Mercedes-Benz GLS 450
Complaints, recalls, TSBs, investigations and safety ratings side by side, from official federal data. Last verified Sep 11, 2026. Raw complaint counts are not adjusted for sales volume.
| Metric | 2019 Mercedes-Benz GLS 450 | 2020 Mercedes-Benz GLS 450 |
|---|---|---|
| NHTSA complaints | 20 | 35 |
| Recall campaigns | 2 | 20 |
| Service bulletins (TSBs) | 109 | 247 |
| Investigations | 0 | 0 |
| Crash reports | 0 | 3 |
| Fire reports | 1 | 1 |
| NCAP overall rating | — | — |
| EPA MPG (combined) | — | — |
| Median reported incident mileage | — | — |
Reported problems side by side
| Component | Mercedes-Benz GLS 450 | Mercedes-Benz GLS 450 |
|---|---|---|
| Electrical System | 2 | 18 |
| Engine | 2 | 9 |
| Power Train | 3 | 4 |
| Forward Collision Avoidance | 0 | 7 |
| Fuel/propulsion System | 0 | 6 |
| Back Over Prevention | 2 | 2 |
| Structure | 2 | 2 |
| Engine and Engine Cooling | 3 | 0 |
Symptoms owners describe
| Check engine light | 0 | 5 |
2019 Mercedes-Benz GLS 450
2020 Mercedes-Benz GLS 450
Compare all Mercedes-Benz GLS 450 vs Mercedes-Benz GLS 450 years →
Method. Complaints are unique NHTSA reports. A vehicle that sold more units will naturally accumulate more complaints — use shares and read the underlying reports before drawing conclusions.