Here's a link with alot of electrical manuals for BMW:
http://wedophones.com/BMWManualsLead.htm This should be for an m44 318Ti:
http://wedophones.com/Manuals/BMW/19...g%20Manual.pdf And if i'm not mistaken, here's one for the s52 M3:
http://wedophones.com/Manuals/BMW/19...g%20Manual.pdf Hope this helps.
EDiT: Here's a guide on the European DIN format used in these manuals:
http://www.thesamba.com/vw/archives/...April_2003.pdf