Fantastic performance (0-60 in 4.2 secs - 530 horsepower) with refined comfort and advanced technology. Fully automatic retractable hardtop convertible for cruising in the sunshine. 7 speed AMG Speedshift transmission for effortless driving. ECO Start/Stop for economy. Harmon/Kardon surround sound for musical pleasure. Parktronic for safe parking. Active lane control and Blind Spot Assist for safety.