Sitting in between the smaller C-Class and larger S-Class, the just-right 2006 Mercedes-Benz E-Class gets an all-new 3.5-liter V6 producing 268 horsepower and 258 lb.-ft. of torque. The power is transferred to the rear wheels through a seven-speed transmission. Otherwise, only minor changes are made to this best-seller, which continues in both sedan and wagon body styles.