| Model Year | 2008 | 2007 | |
| Model | Mercedes-Benz M-Class | BMW X3 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr SUV | 4dr SUV | |
| Difference | |||
| Wheelbase | 114.7 in | 110.1 in | 4.6 in |
| Length | 188.5 in | 179.7 in | 8.8 in |
| Width | 75.2 in | 73.0 in | 2.2 in |
| Height | 71.5 in | 66.0 in | 5.5 in |
| Curb Weight | 4705 lb. | 4012 lb. | 693 lb. |
| Fuel Capacity | 25.1 gal. | 17.7 gal. | 7.4 gal. |
| Headroom, Row 1 | 39.9 in | 38.1 in | 1.8 in |
| Shoulder Room, Row 1 | 59.9 in | 55.8 in | 4.1 in |
| Hip Room, Row 1 | 55.0 in | 0.0 in | 55 in |
| Legroom, Row 1 | 42.2 in | 40.2 in | 2 in |
| Headroom, Row 2 | 39.8 in | 37.8 in | 2 in |
| Shoulder Room, Row 2 | 59.8 in | 55.4 in | 4.4 in |
| Legroom, Row 2 | 40.0 in | 35.8 in | 4.2 in |
| Total Legroom | 82.2 in (over 2 rows) | 76 in (over 2 rows) | 6.2 in |
| Cargo Volume, Minimum | 29.4 ft3 | 30.0 ft3 | -0.6 ft3 |
| Cargo Volume, Maximum | 72.4 ft3 | 71.0 ft3 | 1.4 ft3 |
| 2008 Mercedes-Benz M-Class Seat Room and Comfort: Pros | ||
| Year | Body/Powertrain | Comment |
| 2008 | 4dr SUV turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD |
Bottom seat cushions are long enough for taller drivers. Padding is not too firm or too soft. Excellent support and an upright, easy-chair seating position, instead of having to extend your legs horizontally to get legroom. Results in no low back pain. see full Mercedes-Benz M-Class review |
| 2007 | 4dr SUV turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD |
Can drive this vehicle all day long and not be tired. see full Mercedes-Benz M-Class review |
| 2008 Mercedes-Benz M-Class Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 2008 | 4dr SUV 382-horsepower 5.5L V8 7-speed shiftable automatic AWD |
very still and uncomfortable for long drives see full Mercedes-Benz M-Class review |
| 2007 BMW X3 Seat Room and Comfort: Pros | ||
| Year | Body/Powertrain | Comment |
| 2007 | 4dr SUV 260-horsepower 3.0L I6 6-speed manual AWD |
With the comfort seat option, you can customize seat position to you preference, including lumbar and shoulder adjustment. Decent support for someone up to 6 feet tall. Heated seats work very well. see full BMW X3 review |
| 2007 BMW X3 Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 2007 | 4dr SUV 260-horsepower 3.0L I6 6-speed manual AWD |
A little cramped and very stiff seats. see full BMW X3 review |
| 2006 | 4dr SUV 225-horsepower 3.0L I6 5-speed shiftable automatic AWD |
seats are underpadded and undercontoured see full BMW X3 review |