The Mercury XM-800 is a concept car created by Mercury and first introduced at the 1954 Chicago Auto Show.[1] In newspaper publicity at its 1954 debut, in Chicago and elsewhere, it was presented with its full name, Mercury Monterey XM-800.[2][3][4][5][6][7] The XM, or experimental Mercury, "push car" (meaning that it was not drivable) went the 1954 US auto show circuit season.[1] Although it was promoted by Ford as an "advanced design, engineered to go into volume production,” the XM 800 never passed the concept phase.