Although the car has the S644 Bluetooth Phone Preparation option I had been unable to pair any of my phones using the code that a previous owner had captured on the inside cover of the manual.
As a result I had to strip the boot to get to the Bluetooth module so I could check the code. Turns out they had written the wrong code down and when I entered the correct passkey (1773) I had immediate success.
With the boot lining out I also took the opportunity to fit a BlueMusic adapter and check for any water ingress.
As expected everything was bone dry so replaced all the trim and attempted to connect to the BlueMusic device. Unfortunately I couldn't get it to work in fact it was even showing in Bluetooth devices. Turns out although the car was prepped for the CD changer the fuse wasn't fitted (#48) and once rectified the device appeared and I was able to connect.
Although I have the option of an Aux port that was fitted by a previous owner I like the BlueMusic device becuase it's out of sight and avoids the need for any wires