Abstract: A two-piece adjustable support for supporting the edge of a windshield panel on a vehicle body includes a molded plastic base member and molded plastic rotary cam member. The base member and the rotary cam member have integrally molded mating cylindrical elements with a snap-fitting retention mechanism to rotatably mount the rotary cam member on the base member. The base member has an integrally molded fastener which inserts through an aperture in the vehicle body panel to immovably mount the base member on the vehicle body. The rotary cam member has a cam surface on the periphery thereof for engaging and supporting the lower edge of the windshield panel. A detent integrally molded with the members includes a plurality of teeth molded on the rotary cam member and engaged by at least one tooth carried by a flexible spring arm integrally molded with the base member.