Operating method for a hybrid drive, in particular for selecting optimal operating modes of the hybrid drive along a travel route

The invention relates to an operating method for a hybrid drive of a motor vehicle, in particular a plug-in hybrid or range-extender vehicle, which can be operated in multiple operating modes. The invention relates in particular to an operating method for selecting optimal operating modes of the hybrid drive along a driving route. The operating method comprises the steps of dividing a driving route into a sequence of route segments (S30); determining at least one predicted target variable for each of the operating modes of the hybrid drive on each route segment along the driving route (S40); determining an optimal path for the driving route (S50), wherein a path is a sequence of operating modes along the driving route, such that each route segment is assigned an operating mode and the optimal path is the one which has an optimal value for the at least one target variable.