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.
Tesla Model S up 76% over the same quarter the previous year, and setting a new record for the most cars delivered in a quarter. Global Model S sales passed the 100,000 unit milestone in December 2015, three years and a half after its introduction. A total of 50,446 Model S sedans were sold globally in 2015, making the Model S the world's best-selling plug-in electric car in 2015, ahead of the Nissan Leaf (about 43,000 units). , a total of 107,228 Model S sedans had been sold worldwide since its introduction, ranking as the world's second best selling plug-in car ever after