2014 Mercedes-Benz CLS63 AMG 4MATIC: Nothing Exceeds Like Excess Published on May 9, 2014 in Test Drives by Benjamin Hunting Photo: Benjamin Hunting. 90 percent of drivers will be happy that the 550 horsepower and 531 lb-ft of torque produced by the CLS63 AMG's bi-turbo 4.7-liter V8 have been given an all-wheel drive assist.