Method and device for coupling a trailer to a motor vehicle

A method for coupling a trailer coupling of a motor vehicle to a drawbar of a trailer, in particular for a trailer of a tractor, wherein the connecting the trailer coupling of the tractor is detected with the drawbar of the trailer by means of an image sensor, characterized in that a braking operation of the motor vehicle (1) is introduced , when in connecting the trailer coupling (4) with the drawbar (3) moving a trailer coupling (4) associated with the closure element (8) is detected by the image sensor (5).