Abstract: In order to fit a motor (12) in a housing (16) for an adjustment element, the motor (12) needs to be only axially introduced into a pot-shaped holding receiver (17). Said receiver (17) is then covered on the drive side by means of an assembly element (21) which is essentially in the form of a ring disk, and which, in order to obtain axial tolerance compensation, is supported opposite the housing by means of a spring arm (28) arranged in a crown-shaped manner. Said assembly element positively engages with the end shield (25) of the motor (12) and with the housing (16), in order to harness the torque. The axial connections (26) between the motor (12) and the assembly element (21) are used simultaneously, in terms of the position, the cross-section and/or depth of contact, for coding the motor classification by the assembly element (21).