Quick-release coupling system for a steering wheel, in particular for racing vehicles, having a steering wheel-side coupling part and a vehicle-side coupling part, which in the assembled state engage in each other in a mechanically positive-locking manner, the vehicle-side coupling part has at least one engagement element and the steering wheel-side coupling part has an element which is complementary to the said engagement element, the said engagement element and element coming into engagement only when correctly oriented with respect to the longitudinal-axis rotational position, and the coupling parts (1, 3) can be pushed into one another in the direction of the longitudinal axis, characterized in that the quick-release coupling system has electrical connecting elements (21, 23) which produce an electrical connection in the assembled state, the electrical connecting elements (21, 23) being arranged in the rear region of the coupling part and/or of the coupling part that the electrical connecting elements (21, 23) do not come into contact until both the correct orientation with respect to the longitudinally axial rotational position and concentric positioning with respect to the alignment of the longitudinal center axes (L, F) are present when the coupling parts (1, 3) are mounted, at least in the foremost of the regions, which are to be engaged in one another, of at least one coupling part (1, 3), an insertion aid and/or centering aid is/are arranged, and the insertion aid and/or centering aid is/are designed in the form of at least one coupling part which tapers or widens in the direction of the longitudinal axis towards the front region, wherein the engagement elements (15, 17) are each arranged at least in the front of the regions of the coupling parts (1, 3) to be engaged with each other and cooperate in such a way that even a partial insertion in the wrong orientation is prevented. the vehicle-side coupling part has at least one engagement element and the steering wheel-side coupling part has an element which is complementary to the said engagement element, the said engagement element and element coming into engagement only when correctly oriented with respect to the longitudinal-axis rotational position, and the coupling parts (1, 3) can be pushed into one another in the direction of the longitudinal axis, characterized in that the quick-release coupling system has electrical connecting elements (21, 23) which produce an electrical connection in the assembled state, the electrical connecting elements (21, 23) being arranged in the rear region of the coupling part and/or of the coupling part that the electrical connecting elements (21, 23) do not come into contact until both the correct orientation with respect to the longitudinally axial rotational position and concentric positioning with respect to the alignment of the longitudinal center axes (L, F) are present when the coupling parts (1, 3) are mounted, at least in the foremost of the regions, which are to be engaged in one another, of at least one coupling part (1, 3), an insertion aid and/or centering aid is/are arranged, and the insertion aid and/or centering aid is/are designed in the form of at least one coupling part which tapers or widens in the direction of the longitudinal axis towards the front region, wherein the engagement elements (15, 17) are each arranged at least in the front of the regions of the coupling parts (1, 3) to be engaged with each other and cooperate in such a way that even a partial insertion in the wrong orientation is prevented.