Mercedes-AMG has revealed the CLE 646 Spezialanfertigung, the second car in its Mythos series. Production will be limited to just 30 units.The CLE 646 is motivated by a 637-horsepower twin-turbo 4.0-liter V-8 that is connected solely to the rear wheels.Mercedes-AMG cut 375 pounds from the curb weight of a CLE53 through the use of carbon fiber and by removing interior niceties such as the rear seats.