 The Nissan Leaf was the U.S. top selling plug-in car in 2011 (9,674), and the Chevrolet Volt topped sales in 2012 (23,461).Again in 2013, sales were led by the Chevrolet Volt with 23,094 units, followed by the Nissan Leaf with 22,610 cars, and the Tesla Model S with about 18,000 units.In 2013 the Model S was the top selling car in the American full-size luxury sedan category, ahead of the Mercedes-Benz S-Class (13,303), the top selling car in the category in 2012.