Method for the axial assembly of a starter-generator and a combustion engine

The method involves pre-assembly alignment of the drive parts of the rotor (2) and rotation drive part (5) and fixing the rotation angle setting of the rotor, at least during its axial assembly, using a braking current, especially a d.c. braking current, in the starter generator (2,3), especially the stator winding (3.1) of the asynchronous machine.