Mercedes-AMG GT four-door coupe spied before Geneva debut

At the Geneva Motor Show last year, Mercedes-AMG wowed everyone with its impressive GT Concept. Now, this year’s show -- less than a month away -- will see the debut of the real thing: Mercedes’ latest take on blurring the line between a performance sedan and a so-called four-door coupe. To help build anticipation, a set of spy-themed photos of …