Coupling system, in particular fifth wheel coupling system, comprising a first coupling arrangement, a second coupling arrangement, a first measuring arrangement and a second measuring arrangement, wherein the first coupling arrangement is or can be fixed to a first vehicle, in particular a trailer, wherein the first coupling arrangement comprises a force transmission element, in particular a king pin, which extends in a king direction, wherein the second coupling arrangement is or can be fixed to a second vehicle, in particular a towing vehicle, wherein the second coupling arrangement comprises in particular a fifth wheel coupling, wherein the first coupling arrangement and the second coupling arrangement are designed in such a way that they can be rotated relative to one another about the king direction in an engaged state, wherein the first measuring arrangement is fixed relative to the first coupling arrangement, wherein the second measuring arrangement is fixed relative to the second coupling arrangement, wherein the first measuring arrangement is designed such that, in the engaged state, it measures or can measure directly without contact and/or indirectly without contact an angle of rotation of the first coupling arrangement about the king direction, wherein the second measuring arrangement is designed such that, in the engaged state, it measures or can measure directly without contact and/or indirectly without contact an angle of rotation of the second coupling arrangement about the king direction, wherein the coupling system comprises an evaluation unit, wherein the evaluation unit is designed to form a difference between the measured values of the first measuring arrangement and the second measuring arrangement, characterized in that the first measuring arrangement is fixed relative to the first coupling arrangement in such a way, that at least one sensor of the first measuring arrangement lies on the king direction in the engaged state and/or that the second measuring arrangement is fixed relative to the second coupling arrangement in such a way, that at least one sensor of the second measuring arrangement lies on the king direction in the engaged state. a first coupling arrangement, a second coupling arrangement, a first measuring arrangement and a second measuring arrangement, wherein the first coupling arrangement is or can be fixed to a first vehicle, in particular a trailer, wherein the first coupling arrangement comprises a force transmission element, in particular a king pin, which extends in a king direction, wherein the second coupling arrangement is or can be fixed to a second vehicle, in particular a towing vehicle, wherein the second coupling arrangement comprises in particular a fifth wheel coupling, wherein the first coupling arrangement and the second coupling arrangement are designed in such a way that they can be rotated relative to one another about the king direction in an engaged state, wherein the first measuring arrangement is fixed relative to the first coupling arrangement, wherein the second measuring arrangement is fixed relative to the second coupling arrangement, wherein the first measuring arrangement is designed such that, in the engaged state, it measures or can measure directly without contact and/or indirectly without contact an angle of rotation of the first coupling arrangement about the king direction, wherein the second measuring arrangement is designed such that, in the engaged state, it measures or can measure directly without contact and/or indirectly without contact an angle of rotation of the second coupling arrangement about the king direction, wherein the coupling system comprises an evaluation unit, wherein the evaluation unit is designed to form a difference between the measured values of the first measuring arrangement and the second measuring arrangement, characterized in that the first measuring arrangement is fixed relative to the first coupling arrangement in such a way, that at least one sensor of the first measuring arrangement lies on the king direction in the engaged state and/or that the second measuring arrangement is fixed relative to the second coupling arrangement in such a way, that at least one sensor of the second measuring arrangement lies on the king direction in the engaged state.