The current Mercedes-Benz GLA is 4,412 mm long, 1,834 mm wide and 1,611 mm tall, on a 2,729 mm wheelbase.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 2014–2020 | 4,417 | 1,804 | 1,494 | 2,699 | 421 | 11.8 |
| 2020–presentCurrent | 4,412 | 1,834 | 1,611 | 2,729 | 429 | — |
| 2026–present | 4,565 | 1,873 | 1,604 | 2,790 | 410 | 11.5 |
The Mercedes-Benz GLA offers 900 mm of rear legroom and 980 mm of rear headroom, with 1,150 mm of legroom and 1,100 mm of headroom up front. Rear shoulder room measures 1,390 mm across.
| Front | Rear | |
|---|---|---|
| Legroom | 1,150 mm | 900 mm |
| Headroom | 1,100 mm | 980 mm |
| Shoulder room | 1,400 mm | 1,390 mm |
Interior figures are the roomiest measurement (seat fully back), taken as the median across the current generation’s variants; individual trims vary.
Exterior figures are manufacturer specifications for the GLA, 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.