COUPLING SYSTEM

A coupling system for a towing vehicle that includes at least one sensor, and a fifth wheel arrangement that includes a fifth wheel plate and at least one bearing block, wherein the fifth wheel plate has a trailer surface and an entry opening, wherein the trailer surface has an outwardly pointing normal, wherein the entry opening extends in an entry direction, wherein the fifth wheel plate is pivotably beard about a transverse axis relative to the bearing block, wherein the bearing block has a contact surface, wherein the contact surface lies in a contact plane, wherein the sensor indirectly and/or directly detects a pitch angle about the transverse axis contactlessly, and wherein the sensor is arranged in the immediate vicinity of the fifth wheel plate.