2013 Mercedes-Benz SL550 Price,Pictures,Features,Specifications & Launch Mercedes-Benz unveiled their 2013 Mercedes-Benz SL550 which is set to debut at 2012 Detroit Auto Show, The sixth-generation SL hits the roads by spring 2012.The latest SL550 is powered with a twin-turbocharged and direct-injected 4.6-liter V8 engine which produces 429 horsepowers and 516 pound-feet of torque, and it is [...]