assembly 45 the assembly 45 comprises a beam 46 provided with an enlargement 47 at one end the assembly 45 may be slid into the tailgate between the panels 42 and 43 via an opening not shown formed in the web between the panels at the lower end of the tailgate the enlargement 47 includes hinges 48 by means of which the cartridge assembly is hinged to the body of the station wagon for swinging movements about a substantially horizontal axis suitable bolts or the like 49 secure opposite ends of the beam enlargement 47 to the adjacent webs 44 of the tailgate the free end of the beam 46 abuts the endmost web 44 of the tailgate and is fixed to the latter by suitable bolts 50 or the like although not shown it will be understood that window glass supporting and operating means as well as tailgate latch operating means may be incorporated in the cartridge assembly 45 and fixed to the beam 46 in a manner like that disclosed in the earlier described embodiment it also will be understood that the embodiment shown in fig5 is equally applicable to those vehicles which have a closure hinged at its upper.