Latest Update... purchased a BMW Scanner 1.4 ($30 Amazon) and after eventually getting this to work on a virtual machine running Windows XP on a windows 10 laptop I could read the codes ....
Initially DDE showed errors in all 6 glow plugs and the controller. I cleared the errors, started the car and then re-scanned. All Glow plugs in 6 cylinders came up as faults.
So... does this mean the glow plugs all need replacing or should I replace the controller relay first ? It looks like the controller relay could be replaced on a RHD without having to remove the inlet manifold, has anyone done this? All of the glow plugs were replaced about 150K ago but not the controller.

A couple of other errors came up
1) the steering angle sensor
2) Supplemental Restraint System ... Not sure if I need to be concerned about these. all the errors are in the following links:
DDE https://www.dropbox.com/s/uu1dsuj7gk..._5171.JPG?dl=0
LEW https://www.dropbox.com/s/k82iljg4ci..._5172.JPG?dl=0
SRS https://www.dropbox.com/s/byvmtu4ujb..._5173.JPG?dl=0
IKE https://www.dropbox.com/s/n5t2z1t41i..._5174.JPG?dl=0

If anyone can share any insight into these that would be appreciated.

Cheers