FILE - In this Dec. 3, 2010 file photo, Nissan Motor Co. Chief Operating Officer Toshiyuki Shiga introduces the company's zero-emission electric car Leaf during a news conference at its headquarters ... more 
FILE - In this Dec. 3, 2010 file photo, Nissan Motor Co. Chief Operating Officer Toshiyuki Shiga introduces the company's zero-emission electric car Leaf during a news conference at its headquarters in Yokohama near Tokyo. Nissan is studying sensations such as smoothness and warmth for making handles, seating and other interior parts to differentiate its cars from rivals. Japan's No. 2 automaker gave a demonstration to reporters Wednesday, March 2, 2011 at its Yokohama headquarters of innovations that focus on tiny, almost quirky details, like minuscule bumps on fake-leather plastics, designed to give the feeling of luxury to the touch. less 
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Associated Press | Photo By Itsuo Inouye, FILE
Fri, Mar 4, 2011 3:30 PM EST