Abstract: In a method for determining the drawbar length of a trailer of a tractor vehicle with a front-axle steering system for adjusting a front-axle steering angle and optionally additionally a rear-axle steering system for setting a rear-axle steering angle, an estimated value for the drawbar length is determined with an estimation method from an articulation angle, as detected by a sensor, between the trailer and the tractor vehicle on the basis of the front-axle steering angle and optionally the rear-axle steering angle, and the movement variables speed and yaw rate of the tractor vehicle.

Abstract: A method and device for the recognition of a trailer (2) of a motor vehicle (1), wherein the trailer (2) is connected to the motor vehicle (1) via a coupling device (3), wherein a control device (4) collects and stores data relating to the currently connected trailer (2) during an operating phase of the motor vehicle, and a device for identification (5) of the trailer (2) is able to ascertain, by means of a test signal, a separation of the connected trailer (2) from the motor vehicle (1) during the shutdown phase of the motor vehicle (1).

Abstract: In a method for determining the drawbar length of a trailer of a tractor vehicle with a front-axle steering system for adjusting a front-axle steering angle and optionally additionally a rear-axle steering system for setting a rear-axle steering angle, an estimated value for the drawbar length is determined with an estimation method from an articulation angle, as detected by a sensor, between the trailer and the tractor vehicle on the basis of the front-axle steering angle and optionally the rear-axle steering angle, and the movement variables speed and yaw rate of the tractor vehicle.

Abstract: The invention relates to a method and device for the recognition of a trailer (2) of a motor vehicle (1), wherein the trailer (2) can be connected to the motor vehicle (1) via a coupling device (3), wherein a control device (4) collects and stores data relating to the currently connected trailer (2) during an operating phase of the motor vehicle, and wherein means for identification (5) of the trailer 2 are able to ascertain, by means of a test signal, a separation of the connected trailer (2) from the motor vehicle (1) during the shutdown phase of the motor vehicle (1).

Abstract: A motor vehicle screen device having a screen that can be driven by a driving mechanism between an inactive position within a cavity of a dashboard and an approximately vertical active position outside the cavity and from the active position into the inactive position. The screen is provided with spaced-apart guiding elements which are guided within guides that run nearly horizontal, perpendicular to the movement path of the screen. The monitor can be driven such that the guiding elements thereof are movable within the guides. At least one of the guiding elements is locked at the active position end of the guide by a locking mechanism.

Abstract: A motor vehicle screen device having a screen that can be driven by a driving mechanism between an inactive position within a cavity of a dashboard and an approximately vertical active position outside the cavity and from the active position into the inactive position. The screen is provided with spaced-apart guiding elements which are guided within guides that run nearly horizontal, perpendicular to the movement path of the screen. The monitor can be driven such that the guiding elements thereof are movable within the guides. At least one of the guiding elements is locked at the active position end of the guide by a locking mechanism.