How to unlock Mercedes- Benz W221 S500 ISM DSM (intelligent servo module) virgin or renew with CGDI Prog MB? Check the detailed guide below.
Follow the wiring diagram to connect CGDI MB and Benz ISM computer
Connect to computer and an external 12V power supply as well
Run CGMB software
Select Auto computer>> Read
Read the key info successfully. The personalized and activated status are Yes.
Calculate erase password, then erase the key successfully
Read the key info again
Now the personalized and activated status are No.
CGDI Prog MB Benz key programmer unlocked Mercedes- Benz W221 S500 ISM DSM virgin successfully.
