Henry Ford family sole ownership of the company. By the mid-1920s, sales of the Model T began to decline due to rising competition. Other auto makers offered payment plans through which consumers could buy their cars, which usually included more modern mechanical features and styling not available with the Model T. Despite urgings from Edsel, Henry refused to incorporate new features into the Model T or to form a customer credit plan. By 1926, flagging sales of the Model T finally convinced Ford to make a new model. He pursued the project with a great deal of technical expertise in design of
Tesla Model S units in 2013, placing the Model S as the third selling plug-in electric car after the Chevrolet Volt (23,094) and the Nissan Leaf (22,610). Also in 2013, the Model S was the top seller in the full-size luxury sedan category, ahead of the Mercedes-Benz S-Class at 13,303. In 2014, 16,689 Model S sedans were delivered, down 10.5% from 2013, but the electric sedan ranked again as the third best selling plug-in car in the U.S. In 2015 the Model S ranked as the top selling plug-in electric car in the U.S, with 25,202 delivered, surpassing both the Leaf (17,296) and