Doug's Take The SLK55 AMG is a thrilling roadster that touts a raucous 355-hp V8 engine, a retractable hardtop, and the kind of driving experience that only an AMG can deliver. This SLK55 boasts some desirable factory equipment like 18-inch AMG wheels, power-adjustable and heated seats, and Airscarf neck-level heaters. It also comes with an aftermarket X-pipe and a resonator delete, which should enhance that V8 sound even more.