The SLK280 is the least powerful offering with a 228-hp V6 mated to a six-speed manual or optionally available seven-speed automatic. An even sportier SLK350 boasts a 268-hp V6 teamed with a seven-speed automatic. The most powerful car in this class is the SLK55 AMG, sporting a 355-hp V8 and a standard seven-speed automatic transmission with paddle shifters. Safety features on all SLK models include six airbags (front, side and knee), stability control, traction control, ABS with Brake Assist and Tele Aid emergency communication system. For 2008, the SLK280 and SLK350 add a limited production "Edition 10" that celebrates the SLK's 10th anniversary on the market.