Mercedes-Benz SL550 World's Safest Convertible Categories Luxury cars The sixth generation of the iconic Mercedes-Benz SL is being launched in May 2012 (2013 SL550 - 429 hp, 516 lb-ft, MSRP: $105,500) with an all-new lightweight aluminum unit body, new levels of driving refinement, even more useful technology... By Spare Wheel, 22 April, 2012
