Trailer coupling for motor vehicles

The trailer coupling for motor vehicles has a ball neck with an axially adjustable locking bolt which on the drive side has an axial thrust rod (16) by which it is connected to a drive for its motorized withdrawal. The drive on its drive shaft (36,37) has an actuating means (38) which with a time stagger first engages with a slide (30) installed orthogonally to the axial thrust rod in its withdrawal path, and after a linear movement of the slide engages with the axial thrust rod for its linear adjustment.