2011MY Mercedes-Benz SL-Class EPA Fuel Mileage Estimates Feb 22, 2010 Model Drivetrain City Highway Combined SL550 (MY '11) 7-spd Automatic 14 21 16 SL63 AMG (MY '11) 7-spd MCT Auto 12 19 14 SL65 AMG (MY '11) 5-spd Automatic 12 18 14 Share Save Saved Download