When I tried this today, I selected “ Contol Units”, then the “Comand system”, and the hint box appeared, and said something like “waiting” as usual ; but then it just returned me to the menu. Note it wasnt the Usual very busy screen, about a communication error, that one gets if say you select an option you dont have on the car say like “trailer connections”. Was this the MBII totally failing to communicate with the Comand system? Or is it not capable of interrogating the Sound system module? (I never tried before ) Note at that time of checking, the Sound system was playing up big style.