Here is food for thought.
If your ZB number is old, you find new one.
Once you have it, is that how your update:
1- Open winKFP>>Comfort mode>>Enter ZUSB and Enter the assembly number.>> Take note of your ECU family. Shall I press OK here or press cancel?
2. Now press F3 (Update ZUSB) and choose your ECU family.>>Ok
6. F4 (Enter VIN) and enter your full VIN number. >> Ok >>F8 (DONE).
7. F3 (Prog. ZB-Update). Here a pop up shows you your current and updated assembly number. If they are the same you already have the updated software but if not press okay.
Another pop up asking permission to program ecu....press okay and your done.
Can somebody please confirm if I am missing anything here?