| Model Year | 2011 | 2010 | |
| Model | Mercedes-Benz M-Class | BMW Z4 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr SUV | 2dr Hardtop conv. | |
| Difference | |||
| Wheelbase | 114.7 in | 98.3 in | 16.4 in |
| Length | 188.5 in | 166.9 in | 21.6 in |
| Width | 75.2 in | 70.5 in | 4.7 in |
| Height | 70.1 in | 50.8 in | 19.3 in |
| Curb Weight | 4705 lb. | 3241 lb. | 1464 lb. |
| Fuel Capacity | 25.1 gal. | 14.5 gal. | 10.6 gal. |
| Headroom, Row 1 | 39.9 in | 39.1 in | 0.8 in |
| Shoulder Room, Row 1 | 59.9 in | 53.3 in | 6.6 in |
| Hip Room, Row 1 | 55.9 in | 0.0 in | 55.9 in |
| Legroom, Row 1 | 42.2 in | 42.2 in | 0 in |
| Headroom, Row 2 | 39.8 in | 0.0 in | 39.8 in |
| Shoulder Room, Row 2 | 59.8 in | 0.0 in | 59.8 in |
| Hip Room, Row 2 | 56.2 in | 0.0 in | 56.2 in |
| Legroom, Row 2 | 40.0 in | 0.0 in | 40 in |
| Total Legroom | 82.2 in (over 2 rows) | 42.2 in (over 1 rows) | 40 in |
| Cargo Volume, Minimum | 29.4 ft3 | 10.9 ft3 | 18.5 ft3 |
| Cargo Volume, Maximum | 72.4 ft3 | 10.9 ft3 | 61.5 ft3 |
None of our members have yet commented on the seat room and comfort of the 2011 Mercedes-Benz M-Class.
| 2010 BMW Z4 Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 2011 | 2dr Hardtop conv. 255-horsepower 3.0L I6 6-speed shiftable automatic RWD |
What rear seat? see full BMW Z4 review |
| 2009 | 2dr Hardtop conv. 255-horsepower 3.0L I6 6-speed shiftable automatic RWD |
no back seats see full BMW Z4 review |