A retractable roof assembly is provided for a motor vehicle having a rear storage space behind a rear seat within a passenger compartment. The retractable roof assembly includes a rail assembly including at least one rear rail and at least one front rail pivotally hinged to the rear rail. A plurality of roof panels slidingly engage the rear and front rails for movement between a roof configuration covering the passenger compartment and a stacked configuration exposing the passenger compartment. A rear pillar is disposed rearward of the rear rail and selectively supports at least one of the plurality of roof panels. When the plurality of roof panels is in the stacked configuration, the rail assembly, plurality of roof panels, and rear pillar are movable into the rear storage space behind the rear seat in order to provide a full open air roof for the motor vehicle.