Abstract: A motor vehicle trim panel assembly and method including a molded plastic trim panel having a facia portion, an integral skirt portion, a plurality of flat cantilever platforms on an inside surface of the facia portion, and a plurality of pairs of raised bosses on the inside surface of the facia portion. Each platform has a pair of side panels attached thereto by integral “living” hinges. A push-in fastener is supported in a slot in each platform. The side panels are folded down and snapped behind the raised bosses which retain the side panels in active positions defining struts between the platform and the inside surface of the facia portion. Force applied to an outside surface of the facia portion thrusts the push-in fastener into a socket in a vehicle body panel to secure the facia portion without the push-in fasteners being externally visible. The struts react to the facia portion a fraction of the thrust applied to the push-in fastener to prevent flexure of the platform.