Abstract: The invention relates to a method and an apparatus for stabilizing a vehicle-trailer arrangement having a movable trailer hitch, which is secured to the towing vehicle by a guide, and can be moved in the guide with a horizontal component, transversely to the longitudinal axis of the towing vehicle, by control members. A control device controls the movement of the trailer hitch corresponding to a control program that is implemented in the control device. The trailer hitch moves in the direction of the pendulous movement of the trailer drawbar, so the movement of the trailer hitch reduces the angle between the towing vehicle and the trailer drawbar when a pendulous movement occurs. This measure counteracts the pendulous movement of the trailer, and prevents the pendulous movement from building up within the physical limits of the system.

Abstract: In order to reliably lock an electric plug and socket assembly (1) including an outer part (2) and inner part (3) which can be coupled to the outer part, the inner part is provided with a recess (17,17′) into which, when the two parts are coupled, a snap-on hook means (14,14′) is engaged and maintained so as to act as a spring. When the plug and socket assembly (1) is in a locked position, the snap-on hook means (14) or each snap-on hook means is locked against radial excursion since it rests on a bushing (7) which is axially displaceable on the outer part (2). In the locked position, the backward pulled bush (7) releases the snap-on hook means (14,14′) thereby allowing for disengagement of the outer and inner parts (2,3).