1979 Mercury [6] XM - AllCarIndex

Ford's Motor Company's world-famous Ghia Studio of Turin, Italy designed the Mercury "XM" concept car. The one-of-a-kind prototype's unique feature was a rumble seat mounted beneath the rear decklid. By raising the rear hatch window and flipping back the decklid, the car became a four-passenger vehicle. It had a wheelbase of 94 inches, an overall length of 13 feet, four inches, and a height of four feet.

source: www.chicagoautoshow.com