| Model Year | 2009 | 2006 | |
| Model | Audi A8 / S8 | Mercedes-Benz M-Class | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan, ext. | 4dr SUV | |
| Difference | |||
| Wheelbase | 121.0 in | 114.7 in | 6.3 in |
| Length | 204.4 in | 188.5 in | 15.9 in |
| Width | 74.6 in | 75.2 in | -0.6 in |
| Height | 57.3 in | 69.8 in | -12.5 in |
| Curb Weight | 4399 lb. | 4623 lb. | -224 lb. |
| Fuel Capacity | 23.8 gal. | 25.1 gal. | -1.3 gal. |
| Headroom, Row 1 | 37.4 in | 39.9 in | -2.5 in |
| Shoulder Room, Row 1 | 59.1 in | 59.9 in | -0.8 in |
| Hip Room, Row 1 | 0.0 in | 55.0 in | -55 in |
| Legroom, Row 1 | 41.3 in | 42.2 in | -0.9 in |
| Headroom, Row 2 | 38.3 in | 39.8 in | -1.5 in |
| Shoulder Room, Row 2 | 57.5 in | 59.8 in | -2.3 in |
| Legroom, Row 2 | 42.3 in | 40.0 in | 2.3 in |
| Total Legroom | 83.6 in (over 2 rows) | 82.2 in (over 2 rows) | 1.4 in |
| Cargo Volume, Minimum | 14.6 ft3 | 29.4 ft3 | -14.8 ft3 |
| Cargo Volume, Maximum | 14.6 ft3 | 72.4 ft3 | -57.8 ft3 |
None of our members have yet commented on the seat room and comfort of the 2009 Audi A8 / S8.
| 2006 Mercedes-Benz M-Class Seat Room and Comfort: Pros | ||
| Year | Body/Powertrain | Comment |
| 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 |
| 2006 | 4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic AWD |
Seats with warmers are great see full Mercedes-Benz M-Class review |
| 2006 Mercedes-Benz M-Class Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 2005 | 4dr SUV 288-horsepower 5.0L V8 5-speed shiftable automatic AWD w/low range |
Space is limited for adults in the back espically if the front passenger is tall. Seats are not bucket like the front so if driver takes a hard turn you go flying. see full Mercedes-Benz M-Class review |