The Mercedes-Benz AMG GLS63 is a high-performance version of the luxury SUV. It is powered by a powerful 4.0L twin-turbocharged V8 engine that produces 577 horsepower and 561 lb-ft of torque, allowing it to reach 0-60 mph in just 4.4 seconds. It also features a reworked seven-speed automatic transmission, upgraded suspension, and upgraded brakes.