The Cadillac ELR is unveiled during the North American International Auto Show in Detroit, Tuesday, Jan. 15, 2013. (AP Photo/Carlos Osorio)

Associated Press
The Cadillac ELR is unveiled during the North American International Auto Show in Detroit, Tuesday, Jan. 15, 2013. (AP Photo/Carlos Osorio)
The Cadillac ELR is unveiled during the North American International Auto Show in Detroit, Tuesday, Jan. 15, 2013. (AP Photo/Carlos Osorio)