Sorry I misunderstood. All you can do is take a deep breath and clear you mind of everything you have tried on the 2005 4.8. First, if you go to settings on the navigation controls does it show phone? If it does press it and see what it shows. If not, follow the posted directions of Qsilver7 and let me know how far you get. Try the process with key at the first click and if that doesn't work the second and then start it up and try it. Per instructions if it works with the key at any position you will only be able to see the the X5 searching on your phone for a short period of time.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas