In a coupling part (1) of a vehicle coupling system (2), it is proposed that the coupling part (1) has a positioning device (3) for guiding a counter-coupling part (4) into a fixing position during a coupling operation, and that a fixing device (5) is arranged moveably between a release position and a fixing setting, wherein, in the fixing setting, the fixing device (5) can fix a counter-coupling part (4) in the fixing position in a positionally secure manner.
