Well, since there is not a single reply to my question, I owe you some answers provided by Autel tech support. The used ECU needs to be virginized or replaced with a new one from the dealer. Additionally, the MK 908 II should be able to code and initialize, as per tech support. No Autel IMMO tablet on the current market can reprogram/virginize the ECU on cars from 2014 and up (specifically, MBZ and BMW), according to Autel tech support.
Best regards!