X 2007 Audi S4

4.2 L, 8 cyl, Auto (S6), Premium Gasoline

EPA Fuel Economy

Combined: 16 MPG

City: 14 MPG

Highway: 21 MPG

X 2006 Mercedes-Benz C350 4matic

3.5 L, 6 cyl, Auto 5-spd, Premium Gasoline

EPA Fuel Economy

Combined: 19 MPG

City: 17 MPG

Highway: 22 MPG