'This uses very little gas. Super,' he joked while admiring the green, two-seat convertible. Widening his gaze across a set of old race cars, and switching from German to English, he added: 'Look at these cars.' He declined to answer reporters' questions. Schwarzenegger, who was famously a fan of General Motors Corp.'s civilian Hummers, stopped to look at a Land Rover jeep and some other sports-utility vehicles. Many at the show were promoting new green technologies to lower carbon dioxide emissions and fuel costs -- issues Schwarzenegger has championed in California. He stopped for a snack with Magna Steyr, a contract automaker from his native Austria who was touting an electric vehicle powered by a Ford Motor Co. battery. He also visited Ford's section of the showroom, which included the subcompact Fiesta that the company plans to bring to North America from Europe in the coming years. Schwarzenegger's appearance came a day after he toured a technology trade fair in Hanover, Germany, alongside German Chancellor Angela Merkel. There, he urged investment in environmental technology and said it was key to economic recovery.