| Model Year | 2017 | 2012 | |
| Model | Mercedes-Benz GLS | Audi A6 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr SUV | 4dr Sedan | |
| Difference | |||
| Wheelbase | 121.1 in | 114.7 in | 6.4 in |
| Length | 202.0 in | 193.9 in | 8.1 in |
| Width | 76.1 in | 73.8 in | 2.3 in |
| Height | 72.8 in | 57.8 in | 15 in |
| Curb Weight | 5400 lb. | 3682 lb. | 1718 lb. |
| Fuel Capacity | 26.4 gal. | 19.8 gal. | 6.6 gal. |
| Headroom, Row 1 | 41.2 in | 37.2 in | 4 in |
| Shoulder Room, Row 1 | 58.5 in | 57.5 in | 1 in |
| Legroom, Row 1 | 40.3 in | 41.3 in | -1 in |
| Headroom, Row 2 | 40.0 in | 37.8 in | 2.2 in |
| Shoulder Room, Row 2 | 58.3 in | 56.3 in | 2 in |
| Legroom, Row 2 | 38.5 in | 37.4 in | 1.1 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) | 78.7 in (over 2 rows) | 35.1 in |
| Cargo Volume, Minimum | 16.0 ft3 | 14.1 ft3 | 1.9 ft3 |
| Cargo Volume, Behind R2 | 49.4 ft3 | 14.1 | 35.3 ft3 |
| Cargo Volume, Maximum | 93.8 ft3 | 14.1 ft3 | 79.7 ft3 |
None of our members have yet commented on the seat room and comfort of the 2017 Mercedes-Benz GLS.
| 2012 Audi A6 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 review |
| 2012 Audi A6 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 review |