Here is the easy way to do Mercedes S Class W221 intelligent shift module (ism) (dsm) replacement. Virgin ISM with CGDI Prog MB then adapt with MB Star (DAS) to another car.
in Xentry, go to Control Unit- Drive- ISM- intelligent servo module- Control unit adaptations- Detach the transport protection of control module ISM
Press Yes to personalize the control module ISM
ISM is activated.
The procedure was successfully completed.