This 2005 Mercedes-Benz SL65 AMG is a Designo Graphite Edition example that has 27k miles and has reportedly been modified with the RENNTech R1 Performance Package, which consists of an ECU tune and a high-flow intercooler pump. Purchased by the seller in August 2007, the car is finished in Designo Graphite over Designo Graphite Green leather and…