Highs Awesome power and performance, sexy, swoopy design, futuristic interior. Lows Complicated infotainment controls, much more expensive than an AMG E53, less cargo space than a Porsche Panamera. Verdict An inspired combination of design, performance, and practicality. Overview All new just last year, the scintillating 2020 Mercedes-AMG GT53 and GT63 are the German brand's latest versions of a "four-door coupe." Although its name seems to imply that these sexy four-door, four-seat hatchback sedans are based on the GT coupe, Mercedes has actually used the bones of the E-class. The cars' high-performance hardware and powerful engines, however, are pure AMG. All GT four-doors get all-wheel drive, electronically adjustable dampers, sport seats, and big horsepower, while the GT63 and GT63 S models pack twin-turbo V-8s for neck-snapping acceleration. What's New for 2020? Since the AMG GT53, GT63, and GT63 S were all-new models for 2019, not much has changed for 20...