With stylish, eye-catching design, exclusive appointments and cutting-edge technology, the extensively updated 2011 Mercedes-Benz CL-Class underscores its flagship position in the world of refined automobiles. Powered by a new 429-hp V8 biturbo engine which achieves a 10-15% improvement in fuel economy and 23% improvement in CO2 emissions, the CL550 4MATIC opens a new dimension of efficiency