I contact BMW AG and BMW HK to clarify the combo versus the MULF. Basically, they are not the same. The combox is for added Internet and connecteddrive modules. The MULF is for audio and Telephone modules only.
If you buy the combox, you will need to have your iDrive (I don't know if that is true for Non-iDrive) updated. BMW HK confirmed that there is no update for the iDrive and that the connectdrive will only work in Germany and the US. They advised that they will soon have the connectdrive for non iDrive but not for the Z4.
I emailed bimmertech Nav and they confirmed if I want the Internet (Combox) I need to have my iDrive updated and they cannot do this remotely. Hence why BMW is offering both the combox and the URL thing...
Is that what you have as well??