X 2011 Mercedes-Benz S550 4matic

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

MSRP: $96,000

EPA Fuel Economy

Combined: 17 MPG

City: 14 MPG

Highway: 21 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