The pollution-free vehicles, which rely on hydrogen instead of traditional fuel, are in place around the world and represent a $1 billion investment by the company, DaimlerChrysler said.

"Hydrogen has the potential to become an important energy source in the future," said Mark Chernoby, vice president of advance vehicle engineering with the company. "This marks another milestone in DaimlerChrysler´s journey to the long-term goals of zero emission transportation and to reducing our nation´s dependency on foreign oil."