Motorised closing device for vehicle closures, in particular open roof and window raiser

The device has a pollution sensor (7) for detecting the presence of pollutants in air and connected to a control module (5) for closing a group of opening frames of a motor vehicle when a level of detected pollutants exceeds a predetermined threshold. The sensor is placed inside the cab interior of the vehicle. A memory (11) stores the position of each opening frame before closing the opening frames.