( http://www.TFLcar.com ) The 2013 Mercedes-Benz SL550 Roadster is all new and redesigned. This is the sixth generation of the iconic Mercedes-Benz and the new car is loaded with the latest new technology including a new magnesium retractable hardtop that can fold and stow away in 15 seconds. The new 2013 Mercedes-Benz SL550 Roadster also has a bi-turbo V8 that pumps out 429 horsepower and an astounding 516 lb-ft or torque. Check out this review as we spend a week with the new SL to see if it is a worthy car to carry on the long tradition of the most recognizable Mercedes-Benz automobile.