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 the Volt (15,393). The Model S was also the country's best-selling car in the large luxury segment among comparably priced four-door sedans, ahead of the Mercedes-Benz S-Class (21,934) and BMW 7 Series (9,292). Registrations in California totaled 10,723 units in 2015, representing a 12.1% market share of the state's luxury and sports segment, making the Model S the third best selling car in the segment after the Mercedes-Benz E-Class (12,324) and BMW 5 Series (11,133). By the end of 2015, cumulative sales in the American market represented almost 60% of Model S global sales since its introduction. Tesla reported 9,156