GRANADA, Spain — On the first day of the 2024 Mercedes-AMG GT Coupe media drives, I spurred the (genuine two-door) coupe through Spanish mountain roads outside Granada. I’ve spoken before of today’s super sports cars being too much for public roads — 100 pounds of ‘roids in a 20-pound sack. One needs a pressure suit, tower clearance and immunity from prosecution to approach their potential. Well, here is another: an Affalterbach big boy with an afterburner engine, its size and weight uniquely unsuited to humping over spindly Iberian roads with their byzantine zig-zags, their coarse, bumpy tarmac, their numerous, simultaneous cambers and their surprise herds of goats.