cav,
See post #6 in this link...there are other links that have pics, too, but
this diagram is pretty good. Yes, it's for E70, but my E53 looks damn
near identical underneath. That front "under engine" point is a nice
rock solid ridge; you can't miss it.
GL,mD
 
http://www.xoutpost.com/bmw-sav-foru...t-2007-x5.html