The coupe distinction was once reserved for cars with two doors, but the lines have blurred. Today, several Mercedes models use the label, including the 2020 Mercedes-Benz GLC Coupe. Despite its name, the GLC Coupe is a bona fide four-door SUV but with a sleeker and less boxy look than most SUVs. And whatever you might think of the misuse of the nomenclature, the coupe is nearly as easy to live with as its standard GLC counterpart.