The current Mercedes-Benz GLC is 4,721 mm long, 1,894 mm wide and — mm tall, on a 2,888 mm wheelbase. It has grown 6 cm longer since the 2015 GLC.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 2015–2019 | 4,659 | 1,890 | 1,637 | 2,873 | 550 | 11.8 |
| 2016–2019 | 4,734 | 1,890 | 1,600 | 2,873 | 474 | 11.8 |
| 2019–2023 | 4,691 | 1,890 | 1,623 | 2,873 | 487 | 11.8 |
| 2022–presentCurrent | 4,721 | 1,894 | — | 2,888 | 549 | 11.0 |
| 2023–present | 4,769 | 1,896 | 1,620 | 2,888 | 405 | 11.0 |
| 2025–present | 4,845 | 1,913 | 1,644 | 2,972 | 570 | 12.1 |
Exterior figures are manufacturer specifications for the GLC, averaged per generation across its variants and shown for the most common body style. Generations with the same size are merged. Boot capacity is the seats-up figure where the manufacturer quotes one.