A retractable roof assembly for a vehicle is provided that includes relatively movable rigid panels that are positioned to cover a passenger/cargo compartment of the vehicle in an extended position and that are stacked one above another in a retracted position. A telescoping track is provided on opposite lateral sides of the vehicle to guide movement of the roof panels. D-pillars of the roof assembly are slidable between a position wherein they are spaced from the C-pillars to a retracted position in which the D-pillars are adjacent to the C-pillars. Side windows of the vehicle are retracted into the rear quarter panel area of the vehicle.