Patent ID: 8615347

Claim:
An anti-theft security device for a vehicle fifth coupling arranged on a vehicle, the anti-theft device comprising a security apparatus ( 2 ) which engages with a component of the vehicle fifth coupling and blocks the component in an activated state and releases the component in a deactivated state, and with a control apparatus ( 3 ) which is electrically connected to the security apparatus ( 2 ) and reversibly switches the security apparatus between the activated state and the deactivated state, wherein the control apparatus ( 3 ) is connected to at least one vehicle-side system ( 10 a, b, c ) which comprises an emergency function that is triggered upon receipt of a sensor signal indicating an emergency event, the emergency event comprising a situation in which the trailer is separated from the tractor by emergency responders at the place of accident, and wherein, upon triggering of the emergency function of the at least one_vehicle-side system ( 10 a , 10 b , 10 c ), the control apparatus ( 3 ) deactivates the security apparatus ( 2 ) directly or indirectly, wherein a direct deactivation causes an immediate unlocking of the anti-theft security device, and an indirect deactivation enables a performance of additional measures that cause unlocking of the anti-theft security device.