No confusing here! (Drain plug and fill plug are located mostly on the
same spot on all BMW's. For this reason, I've done a little research for you
based on where the fill plug is located on your (2006 x5 4.4i) and it's found to be located at the same area as mine which is a (2001 X5 4.4i). See picture for detail... & you know that your drain plug is under the pan as usual.