When it comes to rapid, luxurious, technologically advanced four-door German transportation, the S63 coupe Mercedes-Benz S63 AMG sedan needs no introduction. This high-powered version of the S Class comes quickly to the mind of anyone who knows anything about segment-defining European flagships. But by ripping two doors off the big sedan, Mercedes set a new tone in big coupe style. They eliminated their capable but somewhat undramatic CL63 AMG coupe and replaced it with a vehicle that steals the show from just about every other car in their lineup (aside from the upcoming AMG GT). The new 2015 Mercedes-Benz S63 AMG 4Matic Coupe is a revelation of a grand tourer.