The 2018 Mercedes-Benz SL-Class is a luxurious hardtop roadster available in SL 450, SL 550, AMG SL 63, and AMG SL 65 trims. The SL 450 features a 362-hp twin-turbo V6, while the SL 550 has a 449-hp twin-turbo V8. AMG models deliver 577 and 621 hp from V8 and V12 engines. All trims mate to a 9-speed automatic with RWD. Key safety features include standard forward collision warning with automatic emergency braking, a driver-drowsiness monitor, and optional lane-keeping assist and blind-spot monitoring. A standard COMAND infotainment system with a 7-inch screen, navigation, Apple CarPlay, and Android Auto enhances interior tech. The 2018 model witnessed updates to standard features and option packages, creating an enhanced luxury package for the discerning driver.