Jmcgxx, I took the instrument cluster out, lower part of the dash, A pillar , sun visor light assembly and ultrasonic sensor and the whole thing surrounding it...
All that is needed so you can take the wire from one point to another.Use something like a strong but also flexible piece of wire or plastic to fish it through especially when you get at the headliner and from lower dash to A pillar...it's pretty much self explanatory once you take all the pieces out of the way.
If you need further help, let me know !

__________________
2006 X5 4.8is LeMans Blue / creambeige interior
Prod.date: 2006-06-21