OK, so an update for anyone still interested......
This has been very convoluted, it’s not so much been a problem as finding the time to actually sort it. And by “it” I mean the Bluetooth.
As stated above I fitted a used MULF, OK not in the conventional place of in the boot but above the glovebox as there was room for it and this saved me in removing all of the panels and running cables to the boot.
A bit of tech first….
On the iDrive system you either have a MULF or a Combox. In turn this then transmits the signals from the Bluetooth, USB and AUX to the headunit via the MOST fibre optic wires.
This can also be the same in a non-iDrive Z4 that has factory Bluetooth.
So when I fitted the MULF I re-routed the AUX and USB feeds to the position above the glovebox and used the factory fitted MOST lines (factory CD changer prep). As far as the AUX and USB these worked perfectly fine with the new iDrive system, but I couldn’t find a way to activate the Bluetooth no matter what research I did. Now as I had the MMI box it wasn’t really a priority as I had Bluetooth through there, but it was annoying as I wanted it all working correctly.
Anyway I took the plunge and bought a Combox and decided to try with that and see where it went. I rewire the connections from the MULF to a new connector for the Combox plugged it all in and tested it and I got AUX and USB working perfectly. I tried the Bluetooth and instead of “Please wait…” constantly it showed options for connecting a phone, so I connected it and low and behold Eureka!!! Not only do I now have fully working Bluetooth for calls but also Bluetooth music all working.
So I’ve also managed to do a software update as well (I managed to find the VIN of an identical Z4 with iDrive) and have updated that, and now also have album art in the USB music option.
So I’m now working on one last thing for it and that is to have reversing camera image on the factory PDC screen. Apparently this is an option in the E9x series, the option to alter the written code for it is present and today I tested the VO code to see if it would accept it and it did. So the next thing to do now is to get hold of an emulator for this and test it out with my current rear camera. All being well it’ll work perfectly. And yes I know I already have it with my MMI box, but I like a challenge and I like to see factory options all working.
So I'm a happy bunny having completed this now, which means I can finish off my iDrive retrofit video and pop it up on my YouTube channel. Also managed to film another video today while I was out there, so plenty of content coming soon
