(ANSA) – New York, September 11 – Fiat and Chrysler CEO Sergio Marchionne sang Chrysler's praises on Monday to representatives of over 2,600 Chrysler auto dealers, mainly from North America but also from around the world. Chrysler has comeback stronger, more dynamic and more creative than ever before, Marchionne told dealers at a trade show in Las Vegas. Chrysler's new autos demonstrate 'our firepower' Marchionne said. He added that Chrysler had embraced a culture of rapid response to opportunities and faster decision-making than before. However, products of great quality and design are not enough to guarantee success, he said. "We can't stop now, we can't take a break. We must stay focused and committed," Marchionne said. United States auto sales are expected to see their best year since 2007, and to gain 10% for a third straight year, Bloomberg reported. Chrysler reported total sales in August increased 14%, while the successful introduction of the Dart in June helped extend its streak of US sales gains to 29 months in a row.