Mercedes-Benz has made up serious ground in the American luxury market, beating out both BMW and long-reigning Lexus in sales last month. The Silver Arrow saw deliveries climb by 17 percent in the US, up to 19,862 units in September. What’s more, Ernst Lieb, the company’s chief executive officer, said that he expects the Mercedes-Benz market share to continue to grow throughout the remainder of 2010.