For the first time, the SL is being produced almost entirely from aluminum and consequently weighs considerably less than its predecessor, according to the folks at M-B. Its highly rigid all-aluminum bodyshell provides the basis for agile, sporty handling that has been taken to an entirely new level, coupled with outstanding bodyroll and ride characteristics. Even better driving dynamics come courtesy of the new direct injection engine, which is more powerful and economical than the outgoing generation. Other new features include the unique FrontBass system, which turns the luxury sports car into a concert hall - with the top down or up. The 2013 SL550 will be available in U.S. showrooms in the spring of 2012.