The current Mercedes-Benz SL is 4,704 mm long, 1,915 mm wide and 1,356 mm tall, on a 2,700 mm wheelbase. It has grown 31 cm longer since the 1980 SL.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 1980–1989 | 4,390 | 1,790 | 1,300 | 2,458 | 260 | 10.3 |
| 1989–1995 | 4,470 | 1,812 | 1,293 | 2,515 | 250 | 10.7 |
| 1995–2001 | 4,499 | 1,812 | 1,293 | 2,515 | 265 | 10.7 |
| 2001–2008 | 4,535 | 1,815 | 1,297 | 2,560 | 235 | 11.0 |
| 2008–2012 | 4,565 | 1,838 | 1,316 | 2,560 | 235 | 11.0 |
| 2012–2020 | 4,617 | 1,877 | 1,315 | 2,585 | 364 | 11.0 |
| 2022–presentCurrent | 4,704 | 1,915 | 1,356 | 2,700 | 192 | 12.4 |
Exterior figures are manufacturer specifications for the SL, 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.