The GT 63 is available in two flavors: standard and S. Both models use the same 4.0-liter biturbo V8 mated to a nine-speed automatic transmission sending the power to all four wheels. The base model's power output is 577 hp, while the S gets 630 hp. Both cars are equipped with adaptive air suspension, rear-wheel steering, launch control, dual MBUX 12.3-inch screens, dual-zone climate control, a 64-color ambient lighting system, power-adjustable, ventilated, and heated front seats, Nappa leather upholstery, and a 14-speaker Burmester sound system. Being the more dynamic of the two, the S comes with the AMG Dynamic Plus package with Race and Drift modes, which is optional on the base model, but other additions include dynamic engine mounts.
A wide variety of exterior styling packages are available on both trims, such as the AMG Night package ($750) and Extended Night package ($550) that replaces many chrome exterior trim pieces with black trimmings, while the AMG Silver Chrome Exterior Accents package ($1,050) does the opposite. The AMG Aerodynamics package ($2,850) adds various aerodynamic enhancements, while two AMG Exterior Carbon Fiber packages ($3,700 or $4,000) add a lot of carbon-fiber exterior trim pieces. The $1,050 Warmth & Comfort package adds heating to the upper front door panels and armrests and rapid heating to the front seats. The $3,550 Executive Rear Seat package replaces the rear bench with two individual seats split by a center console, also adding climate control, USB ports, a wireless charging pad, heated and cooled cupholders, a center touchscreen, and a 115V power outlet to the rear cabin.
Many standalone extras are available, such as a panoramic roof ($2,100), a carbon-fiber roof ($3,000 - S model only), massaging front seats ($1,320), AMG Performance front seats ($2,500), heated rear seats ($580), tri-zone climate control ($760), soft-close doors ($550), and a head-up display ($1,100).