Method for cooperatively tuning future driving manoeuvres of a vehicle using external manoeuvres of at least one external vehicle, the method having the following steps: evaluating a trajectory set of pre-planned trajectories for the vehicle, each having a complexity value, using at least one evaluation criterion; receiving an external data packet from the external vehicle, an external trajectory set, having different pre-planned external trajectories for the external vehicle and having an external complexity value for each external trajectory, being contained in the external data packet; combining a trajectory and an external trajectory in each case to form tuples, and combining the associated complexity value with the associated external complexity value to a form a tuple complexity value of the tuple; selecting collision-free tuples, tuples being selected in which the trajectory and the external trajectory are collision-free within a collision horizon; selecting the collision-free tuple having the lowest tuple complexity value, and classifying the trajectory and the assigned complexity value of this tuple as a benchmark trajectory and benchmark complexity value; characterised in that method has the following further steps: selecting trajectories having a complexity value lower than the benchmark complexity value, and classifying these trajectories and assigned complexity values as required trajectories and required complexity values, a required trajectory being a trajectory which specifies a wish of the vehicle and with which a desired destination can be achieved more favourably than with the benchmark trajectory; selecting trajectories having a higher complexity value than the benchmark complexity value, and classifying these trajectories and assigned complexity values as alternative trajectories and alternative complexity values, an alternative trajectory being a trajectory which specifies a cooperation offer of the vehicle and which the vehicle would be prepared to travel if necessary; and sending a data packet to the external vehicle, a trajectory set, consisting of the benchmark trajectory and the assigned benchmark complexity value plus at least one trajectory from a group comprising the required trajectories, the alternative trajectories and the corresponding complexity values, being contained in the data packet. evaluating a trajectory set of pre-planned trajectories for the vehicle, each having a complexity value, using at least one evaluation criterion; receiving an external data packet from the external vehicle, an external trajectory set, having different pre-planned external trajectories for the external vehicle and having an external complexity value for each external trajectory, being contained in the external data packet; combining a trajectory and an external trajectory in each case to form tuples, and combining the associated complexity value with the associated external complexity value to a form a tuple complexity value of the tuple; selecting collision-free tuples, tuples being selected in which the trajectory and the external trajectory are collision-free within a collision horizon; selecting the collision-free tuple having the lowest tuple complexity value, and classifying the trajectory and the assigned complexity value of this tuple as a benchmark trajectory and benchmark complexity value; selecting trajectories having a complexity value lower than the benchmark complexity value, and classifying these trajectories and assigned complexity values as required trajectories and required complexity values, a required trajectory being a trajectory which specifies a wish of the vehicle and with which a desired destination can be achieved more favourably than with the benchmark trajectory; selecting trajectories having a higher complexity value than the benchmark complexity value, and classifying these trajectories and assigned complexity values as alternative trajectories and alternative complexity values, an alternative trajectory being a trajectory which specifies a cooperation offer of the vehicle and which the vehicle would be prepared to travel if necessary; and sending a data packet to the external vehicle, a trajectory set, consisting of the benchmark trajectory and the assigned benchmark complexity value plus at least one trajectory from a group comprising the required trajectories, the alternative trajectories and the corresponding complexity values, being contained in the data packet.