Here's the USA manual version which has some info.
http://www.bmwusa.com/Standard/Conte...antyBooks.aspx
I have the Canadian one but only on paper. The main difference is that the brakes aren't covered in Canada.
You use the CBS (Condition Based Service) as an indicator.
Also, there's the bmw.ca website and some info in the owner's manual which don't tell much
http://www.bmw.ca/en/topics/owners/v...rotection.html
As for long term, the editor of Roundel Magazine, Mike Miller, has a lifetime maintenance Schedule. Version 03.13 is easily found on the web with Google...