The Mercedes-Benz CL550 is a luxury four-door coupe produced by the German automaker between 2009 and 2014. It was an updated version of the CL-Class luxury coupe, featuring a 5.5-liter V8 engine, seven-speed automatic transmission, and a large array of luxuries and standard features. This mid-sized grand tourer is capable of accelerating from 0 to 60 miles per hour in less than five seconds.