PARIS - Mercedes-Benz is looking for a partner to share engineering and manufacturing costs for its next-generation A- and B-class cars. Mercedes is expected to replace the A class in 2011 and the B class a year later. Getting a partner for the two models could help Mercedes cut costs. "We have to accept that Mercedes alone will not achieve volumes some of our global competitors have," said Thomas Weber, DaimlerChrysler board member for r&d. "We are thinking about our strategy for the next generation of these cars."