No traction or stability control, just ABS. No CAN connections on the ABS control unit according to my wiring diagram. Nothing on the instrument cluster either. There are connections between the DME and the instrument cluster but they aren't marked as CAN and are separate connections to the CAN wiring on the DME.

Yes a Euro spec M3 is a completely different beast. 321hp vs 240hp for a start

I know what you mean about standards. In my line of work (electrical engineer) though I often see manufacturers decide to only use bits of a standard or change it to suit them.

You could be right about EOBD instead of ISO. I haven't got much info on EOBD. I just wish I could find something concrete as to what I should be talking on the diagnostic lines.

I appreciate your input, thanks, but I think I'm a bit more confused now . It would be nice if I could actually get the standards. However, as with all standards they are expensive, and I simply don't know which one to purchase anyway.