Now I remember why technology can be so frustrating. It appeared on the display, fine and when put in pairing mode, appeared to pair OK, but then disconnect. Wouldn't stay connected. This is the first system I've used where after pairing, you have to switch off the ignition before it works. So great, it would now connect.
But then I spent almost two hours trying to figure out why there was no audio coming through the system from the Bluetooth box via the BM54 radio. Double and triple checked my wiring, all fine, but the mute signal wasn't coming out of the Bluetooth box, and even when I manually activated it, still no sound from the Bluetooth. Then I noticed the audio was still coming from the phone itself.
Did a bit of reading up, and one site suggested it might be an incompatibility. As its an old BT module and a new phone, plus it said 'headset' when pairing the phone, I wondered. Tried an older BT phone, and sure enough it works fine! I've seen control problems before, but never control working fine, but audio routing being wrong!
Another two hours of my life I won't be getting back, and it doesn't work with my current phone, either. I wonder if a newer BT will solve the issue? I can't find an up to date compatibility list, either.