Actuation system for a trailer coupling of a motor vehicle

The system has a locking mechanism (8) comprising an axial-movable lock bolt that is formed in a ball neck bearing head (3). The locking mechanism of the ball neck bearing head is connected with a ball neck (5), the ball neck bearing head and a current component (4) by a slewing mechanism (13). A flow control effecting transmission system is arranged between the locking mechanism and the slewing mechanism. The transmission system is influenced by an electromotor such that the locking mechanism and the slewing mechanism are activated.