Mercedes-Benz GLC300 — All Years
| Year | Engine | Fuel | MPG (UK) | NHTSA |
|---|---|---|---|---|
| 2024 | 2L 4-cyl | Premium Gasoline | 35 | — |
| 2023 | 2L 4-cyl | Premium Gasoline | 34 | — |
| 2022 | 2L 4-cyl | Premium Gasoline | 29 | — |
| 2021 | 2L 4-cyl | Premium Gasoline | 30 | — |
| 2020 | 2L 4-cyl | Premium Gasoline | 29 | — |
| 2019 | 2L 4-cyl | Premium Gasoline | 29 | — |
| 2018 | 2L 4-cyl | Premium Gasoline | 29 | — |
| 2017 | 2L 4-cyl | Premium Gasoline | 29 | — |
| 2016 | 2L 4-cyl | Premium Gasoline | 29 | — |
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