X 2011 Mercedes-Benz GL550 4matic

5.5 L, 8 cyl, Auto 7-spd, Premium Gasoline

MSRP: $84,450

EPA Fuel Economy

Combined: 14 MPG

City: 12 MPG

Highway: 17 MPG

X 2009 Audi A6 Avant quattro

3.0 L, 6 cyl, Auto (S6), Premium Gasoline

EPA Fuel Economy

Combined: 21 MPG

City: 18 MPG

Highway: 26 MPG