This was not around when i did my research...it's also not really that clear on what it all means. there is a fair bit of work to be done calculating what pin does exactly what...

You're not wrong there! BMW use these odd alpha-numerical codes instead of plain labels and you have to reference several diagrams to get the complete listing.

I only mentioned the newtis.info resource since as you say, it wasn't around when you started this thread - just wanted to add the updated resource info. These threads have a long half-life!!!! ;)