TRAILER COUPLING

In order for a trailer hitch, comprising a bearing unit mountable on a rear end portion of a vehicle body, in fixed relation to the vehicle, said bearing unit having a bearing base and a ball neck carrier supported for movement on the bearing base, and further comprising a ball neck which at a first end is fixedly connected to the ball neck carrier and at a second end carries a hitch ball and which is movable, by the movement of the ball neck carrier relative to the bearing base, between two final positions, one of which is an operating position and the other one of which is a rest position, to be improved such that the position of the ball neck can be detected as simply and unambiguously as possible, it is proposed that a sensor system be provided for detecting the position of the ball neck relative to the bearing base, which sensor system detects the positions of the ball neck relative to the bearing base mounted in fixed relation to the vehicle and generates position information representative of the respective position of the ball neck.