One of Mercedes’ most expensive cars is back on the market in 2012 and, thanks to last year’s successful overhaul, there are few changes to report. Four different versions of the CL are offered, and a glance at its technical specs will tell you that each boasts its own engine type. While the CL550 and CL63 AMG both come equipped with a V8, the CL600 and CL65 AMG are powered by V12s.