| Model Year | 2018 | 2021 | |
| Model | Mercedes-Benz GLS | BMW i3 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr SUV | 4dr Hatch | |
| Difference | |||
| Wheelbase | 121.1 in | 101.2 in | 19.9 in |
| Length | 202.0 in | 157.4 in | 44.6 in |
| Width | 76.1 in | 69.9 in | 6.2 in |
| Height | 72.8 in | 62.1 in | 10.7 in |
| Curb Weight | 5400 lb. | 2961 lb. | 2439 lb. |
| Fuel Capacity | 26.4 gal. | 2.4 gal. | 24 gal. |
| Headroom, Row 1 | 41.2 in | 39.6 in | 1.6 in |
| Shoulder Room, Row 1 | 58.5 in | 54.8 in | 3.7 in |
| Legroom, Row 1 | 40.3 in | 0.0 in | 40.3 in |
| Headroom, Row 2 | 40.0 in | 37.2 in | 2.8 in |
| Shoulder Room, Row 2 | 58.3 in | 50.4 in | 7.9 in |
| Legroom, Row 2 | 38.5 in | 0.0 in | 38.5 in |
| Headroom, Row 3 | 38.9 in | 0.0 in | 38.9 in |
| Shoulder Room, Row 3 | 50.5 in | 0.0 in | 50.5 in |
| Legroom, Row 3 | 35.0 in | 0.0 in | 35 in |
| Total Legroom | 113.8 in (over 3 rows) | 0 in (over 1 rows) | 113.8 in |
| Cargo Volume, Minimum | 16.0 ft3 | 2.8 ft3 | 13.2 ft3 |
| Cargo Volume, Behind R2 | 49.4 ft3 | 2.8 | 46.6 ft3 |
| Cargo Volume, Maximum | 93.8 ft3 | 11.8 ft3 | 82 ft3 |
None of our members have yet commented on the seat room and comfort of the 2018 Mercedes-Benz GLS.
None of our members have yet commented on the seat room and comfort of the 2021 BMW i3.