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.
Adapt with MB Star in car (online service)
Read also: CGDI MB or MB Star to Renew W221 S500 ISM Module (was flood)?
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
Control module ISM is personalized. Press YES to activate the control module ISM.
ISM is activated.
The procedure was successfully completed.