Method for checking plausibility of trajectory generated on basis of cluster data for at least partially assisting operating motor vehicle, computer program product and assistance system

The invention relates to a method for checking the plausibility of a trajectory (10) generated on the basis of cluster data (7) for at least partially assisting a running motor vehicle (1) by means of an assistance system (2), comprising the following steps: receiving the cluster data (7) by means of a cluster data receiving device (6) of the assistance system (2), a further motor vehicle (11) in the vicinity (5) of the motor vehicle (1) is detected by means of a detection device (4) of the assistance system (2), a travel trajectory (12) of the further motor vehicle (11) is determined by means of an electronic computing device (3) of the assistance system (2), and a trajectory (10) generated on the basis of the cluster data (7) is compared with the travel trajectory (12) of the further motor vehicle (11) by means of the electronic computing device (3), and checking the plausibility of the cluster data (7) by means of the electronic computing device (3) on the basis of the comparison. The invention also relate