Abstract: In a motor vehicle a door and the body are connected by a pantographic hinge device, the arm of which is substantially constructed from a housing module, from which rotatable shaft sections coupled in two end regions project and which has an open side, and a coupling mechanism module for creation of the rotational coupling of the shaft sections to one another, which can be inserted into the housing module through the open side. The coupling mechanism module is inserted into the housing module after the door and body connected to one another through the housing module have been painted.

Abstract: The invention relates to a method for reducing NOx in exhaust gas flows of a motor vehicle, by means of a catalyst. The method is characterized in that an NOx absorbing material is provided in the catalyst.

Abstract: The invention relates to a catalyst for purifying NOX in the flow of exhaust gas of motor vehicles, and is characterized in that the catalyst contains modified clay minerals selected from the group consisting of bentonites, smectites, hectorites and mixtures thereof, all of which being pillared with aluminium, silicon or titanium (oxides).