Over the course of 2018, the G-Class will undergo significant modifications, including a brand-new cabin and a wider body. However, this four-wheel-drive SUV's timeless design will not change. Until then, the G 550 offers a 416-horsepower, twin-turbo 4.0L V8 while the AMG G 63 has a 563-horsepower, twin-turbo 5.5L V8. Its ground clearance and front, rear and central differentials give it undeniable off-road capabilities.