DaimlerChrysler AG's North American unit said on Wednesday it would roll out across the United States its Internet-based marketplace to help save its dealers $1 billion a year through bulk-buy savings. The German-U.S. automaker's Chrysler Group said its 4,500 Chrysler, Dodge and Jeep dealers in the United States can save about $500 per vehicle in fixed business costs through the "Five Star Market Centers" program by using the company's greater purchasing power in buying goods and services.