Underneath the hood is a 362-horsepower twin-turbo 3.0-liter V6 engine that has been tweaked by Mercedes' in-house performance arm AMG. And that AMG-tuned engine is mated to an also-AMG-tuned 9G-tronic automatic transmission. From there, power is routed to all four wheels through — you guessed it — an AMG-enhanced 4MATIC all-wheel drive system. Read more...