Tesla Model X Model X deliveries had gone to US customers. Nevertheless, in January 2016 a Tesla car other than the Model S was registered in Germany and a Tesla Model X was sighted driving there with a license plate from Ingolstadt. Since the Audi headquarters are located in Ingolstadt, this led to speculation that Audi has acquired a Tesla Model X as part of its effort to develop its own battery-electric SUV. Tesla produced 507 Model X in the fourth quarter of 2015, of which 206 were delivered to customers. Model X sales totaled 2,400 units during the first quarter of 2016.
Plug-in electric vehicles in the United States 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, and also surpassing the BMW 7 Series (10,932), Lexus LS (10,727), Audi A8 (6,300) and Porsche Panamera (5,421). During the first quarter of 2014, plug-in car sales captured a 3.0% market share of the luxury vehicle segment, of which, the Model S represented