Mercedes-Benz CLK was produced for the 1998-2002 model years in coupe form, while the convertible was available from 1999-2003. Each debuted as a CLK320 powered by a 215-hp 3.2-liter V6. The CLK430 variant, motivated by a 275-hp 4.3-liter V8, arrived a year later. The high-performance CLK55 AMG coupe and its 342-hp 5.4-liter V8 joined the line in 2001. Its convertible equivalent followed in 2002, and both went away at year's end.All models had standard leather, dual-zone automatic climate control, SmartKey keyless entry, a Bose cassette stereo, power seats with memory, front seat side airbags and antilock brakes. CLK430 models added 17-inch wheels, aero enhancements and different-colored interior items. CLK55 AMGs went further with a stiffer suspension, performance exhaust, xenon headlights, a sunroof, rain-sensing wipers, multicontour front seats, front seat heaters and a rear sunshade.The first changes came for 1999, when stability control became standard on the CLK430 and optional on the CLK320. In 2000 this safety feature became standard across the board, as did Mercedes' new TeleAid emergency communications system. Also, the five-speed automatic transmission on all models gained a manual mode.