The SLK250 is the entry-level offering with a new direct-injection 201-hp turbo four-cylinder engine mated to a six-speed manual or optional seven-speed automatic. A more powerful SLK350 boasts a 302-hp direct-injection V6 teamed with a paddle-shifted seven-speed automatic. The SLK55 AMG tops the class with a 415-hp hand-built 5.5-liter V8 that uses automatic stop/start and cylinder deactivation to improve fuel economy. Safety features on all SLK models include eight airbags, active head restraints, tire pressure monitoring, stability and traction control, anti-lock brakes with Brake Assist, and the mbrace emergency communication system. Options include Bi-xenon headlights with active curve illumination, hard-drive based navigation system, AIRSCARF neck-level heating, harman/kardon audio system and the world's first MAGIC SKY CONTROL electrochromic roof. For 2012, the SLK is completely redesigned, and the SLK55 AMG returns to the line-up after a one year hiatus.