| Model Year | 2007 | 2011 | |
| Model | Mercedes-Benz M-Class | Audi A6 / S6 | |
| Engine | 6.2L V8 DOHC-4v 503 hp@6800 465 lb-ft@5200 |
5.2L V10 DOHC-4v 435 hp@6800 398 lb-ft@3000 |
|
| Transmission | 7-speed shiftable automatic | 6-speed shiftable automatic | |
| Drivetrain | AWD | AWD | |
| Body | 4dr SUV | 4dr Wagon | |
| Difference | |||
| Wheelbase | 114.7 in | 111.9 in | 2.8 in |
| Length | 188.5 in | 194.2 in | -5.7 in |
| Width | 75.2 in | 73.1 in | 2.1 in |
| Height | 69.8 in | 58.2 in | 11.6 in |
| Curb Weight | 5093 lb. | 4563 lb. | 530 lb. |
| Fuel Capacity | 25.1 gal. | 21.1 gal. | 4 gal. |
| Headroom, Row 1 | 39.9 in | 37.6 in | 2.3 in |
| Shoulder Room, Row 1 | 59.9 in | 57.1 in | 2.8 in |
| Hip Room, Row 1 | 55.0 in | 0.0 in | 55 in |
| Legroom, Row 1 | 42.2 in | 41.3 in | 0.9 in |
| Headroom, Row 2 | 39.8 in | 38.0 in | 1.8 in |
| Shoulder Room, Row 2 | 59.8 in | 55.9 in | 3.9 in |
| Legroom, Row 2 | 40.0 in | 36.9 in | 3.1 in |
| Total Legroom | 82.2 in (over 2 rows) | 78.2 in (over 2 rows) | 4 in |
| Cargo Volume, Minimum | 29.4 ft3 | 33.9 ft3 | -4.5 ft3 |
| Cargo Volume, Maximum | 72.4 ft3 | 58.6 ft3 | 13.8 ft3 |
| 2007 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 |
| 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 |
| 2007 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 |
| 2011 Audi A6 / S6 Seat Room and Comfort: Pros | ||
| Year | Body/Powertrain | Comment |
| 2012 | 4dr Sedan supercharged 310hp 3.0L V6 8-speed shiftable automatic AWD |
Very supportive seats, nice leather, great heated seats. see full Audi A6 / S6 review |
| 2011 Audi A6 / S6 Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 2011 | 4dr Sedan supercharged 300hp 3.0L V6 6-speed shiftable automatic AWD |
Rear seat room is average, no better. see full Audi A6 / S6 review |