The 2015 Mercedes-Benz SLK is a luxury hardtop convertible from the car's second generation. It's offered in three trims: SLK250, SLK350, and SLK55 AMG, each with unique powertrains. The base SLK250 hosts a turbocharged 1.8L four-cylinder engine with 201 horsepower, while the SLK350 boasts a 3.5L V6 that produces 302 horsepower. For performance enthusiasts, the range-topping SLK55 AMG features a 5.5L V8 engine that churns out 415 horsepower. All models come standard with rear-wheel-drive and the automatic transmission, either a seven-speed for SLK250 and SLK350 or a more performance-focused seven-speed 'AMG SPEEDSHIFT' for the SLK55 AMG. The cabin is well-appointed with features such as a 5.8-inch display unit, a Harman Kardon sound system, and the COMAND infotainment system with navigation. Safety features include Attention Assist, which monitors driver behavior and sends alerts during detected drowsiness, and Mercedes' PreSafe system, which prepares the vehicle for an impending collision.