The 2011 CL-Class lineup features a restyled body and cabin and new mbrace telematics. The CL550's 5.5-liter V-8 has been replaced by a 4.6-liter, 429-horsepower direct-injection V-8 with 47 more horses and a whopping 185 pound-feet more torque. The CL63 gets a new twin-turbo 5.5-liter direct-injected V-8 with stop/start technology, plus AMG's seven-speed multi-clutch trans. CL65 now offers more power, and there are several new safety systems on all models.