The redesigned 2024 Mercedes-Benz AMG GT Coupe starts sales this spring priced from $136,050, including a $1,150 destination charge. It arrives in GT 55 and GT 63 grades, both fitted with the familiar twin-turbocharged 4.0-liter V-8 engine. The GT 55 is rated at 469 hp. Upgrading to the GT 63, which is priced from $177,050, including destination…