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 after its introduction, with the largest share, 57%, in the US. With an estimated 12,700 units delivered during the fourth quarter of 2016, sales totaled about 50,931 units in 2016, making the Model S the world's top selling plug-in car for the second year running. The United States had about 29,156 units delivered, followed by China with 6,334, surpassing Norway as the largest Model S overseas market. , about 158,159 Model S cars have been sold worldwide since its introduction, making the Model S the world's second best-selling plug-in electric car ever after the Nissan Leaf (250,000), and ahead of