Abstract: An installation for ventilating the interior space of a passenger motor vehicle which includes air inlet and air discharge apertures terminating in the atmosphere, a fresh air channel leading from the air inlet aperture into the interior space, a fan and a one-piece or a multi-partite air filter insert arranged in the fresh air channel or channels and adapted to be traversed by the fresh air; at least one of the fresh air channels is thereby extended along a space readily accessible through a large continuous surface, such as the hat storage area normally disposed in front of and underneath the rear window whereby this air channel is enlarged housing-like within this area for accommodating the air filter insert and is equipped with an opening of large surface and adapted to be closed for the ready interchange of the air filter insert.

Abstract: A roof for a motor vehicle, particularly a passenger motor vehicle which possesses an area to be opened intermediate the windshield and a roll-over girder disposed within the area of the rear window; the area to be opened in the roof is subdivided into two sections which are adapted to be displaced telescopically and can be retracted one within the other into the area of the roll-over girder so as to be completely covered by the outer member of the roll-over girder; the roll-over girder together with the outer covering member thereby preferably forms a hollow body.