The current Mercedes-Benz GLB covers up to 630 km on a full charge. Figures below are the longest-range variant in each generation.
| Years | Powertrain | Range |
|---|---|---|
| 2020–2023 | Combustion | 1,224 |
| 2023–2026 | Combustion | 769 |
| 2026–present | Electric | 630 |
Range is the manufacturer-rated maximum for the longest-range variant in each generation. Electric generations use the rated battery range; combustion generations are calculated from tank capacity and combined-cycle consumption. Figures outside a plausible range are excluded rather than shown with a guessed correction.