Here's a couple things I googled up: https://www.newtis.info/tisv2/a/en/e63-m6-cou/ http://www.bmw-planet.net/diagrams/release/en/e63e64/index.htm https://blog.bavauto.com/10101/bmw-...e-and-repair-manual-645i-650i-645ci-650ci-m6/ Try google search for: BMW E63 wiring diagrams and: BMW E63 maintenance manual