For 2005, Mercedes-Benz releases the CLK-Class coupes and cabriolets into the luxury car market. Three trims are offered, including the 3.2L V6 CLK320, the 302-hp 5.0L V8 CLK500, and the powerful CLK55 AMG, which boasts a 5.5L V8 producing 362 horsepower. Other AMG upgrades include double spoked 17-inch alloy wheels, Nappa leather sport seats, AMG tuned suspension, and the SpeedShift five-speed automatic transmission. Standard amenities on all models include a fully automatic power soft-top, dual-zone climate control, premium leather seats, and a Bose stereo system. The CLK also offers several unique options, such as Keyless Go, a power pull-down trunk, and the Parktronic Parking aid system.