EPA-verified MPG for all 10 variants (2017–2026)
GLS450 by model year — click a row to jump to that year
| Year | Best MPG | Avg MPG | Variants |
|---|---|---|---|
| 2026 | 21 MPG | 21 MPG | 1 |
| 2025 | 21 MPG | 21 MPG | 1 |
| 2024 | 21 MPG | 21 MPG | 1 |
| 2023 | 20 MPG | 20 MPG | 1 |
| 2022 | 20 MPG | 20 MPG | 1 |
| 2021 | 21 MPG | 21 MPG | 1 |
| 2020 | 21 MPG | 21 MPG | 1 |
| 2019 | 18 MPG | 18 MPG | 1 |
| 2018 | 19 MPG | 19 MPG | 1 |
| 2017 | 19 MPG | 19 MPG | 1 |