Mercedes-Benz GLS450 4matic Fuel Economy History
MPG by year — EPA official data.
Best MPG Year
2026
21 MPG combined
Latest Model
2026
21 MPG combined
| Year | Engine | City | Hwy | Combined | Fuel Cost/yr | |
|---|---|---|---|---|---|---|
| 2026 | Premium Hybrid | 19 | 24 | 21 | $3,900 | Details → |
| 2025 | Premium Hybrid | 19 | 24 | 21 | $3,900 | Details → |
| 2024 | Premium Hybrid | 19 | 24 | 21 | $3,900 | Details → |
| 2023 | Premium Hybrid | 18 | 23 | 20 | $4,100 | Details → |
| 2022 | Premium Hybrid | 18 | 24 | 20 | $4,100 | Details → |
| 2021 | Premium Hybrid | 20 | 24 | 21 | $3,900 | Details → |
| 2020 | Premium Hybrid | 19 | 23 | 21 | $3,900 | Details → |
| 2019 | Premium | 16 | 22 | 18 | $4,550 | Details → |
| 2018 | Premium | 17 | 22 | 19 | $4,300 | Details → |
| 2017 | Premium | 17 | 22 | 19 | $4,300 | Details → |