The 2004 Audi S4 is available in various trim levels, including the two-door Cabriolet, the four-door Sedan, or the five-door Wagon. Choose from the two-door Cabriolet Quattro (in either manual or automatic), the four-door Sedan Quattro (in either manual or automatic), or the five-door Wagon Avant Quattro (in either manual or automatic). All trim levels feature a 340 horsepower 4.2-liter engine with either a six-speed manual or six-speed automatic transmission. Standard equipment includes dual zone climate control, cruise control, keyless entry, power mirrors and seats, a trip computer, a navigation system and alloy wheels. EPA estimates peg the 2004 Audi S4 at 18 City/23 Highway.