Has my suspension collapsed?

[Cole]

I have been experiencing the creaky rear suspension symptoms for a while, as per http://www.xoutpost.com/bmw-sav-forums/x5-e53-forum/63332-x5-making-squeaky-noise-rear-not-shock-2.html but this weekend I also noticed that my rear camber seems to be way off (Pics attached, I hope!)... any sugestions as to the possible causes? Rear wheels seem to be leaning in at the top (or out at the bottom) quite noticeably.

I suspect there may be some sort of problem with the rear air suspension. ('06 X5 3.0D self leveling air suspension (rear only)) but the vehicle still seems(?) to ride at the correct height. Just creaks (a lot), and now appears to have a bad camber angle. Is there some way to test the air suspension? It is the rear only self leveling type so I have no buttons on the dash to raise or lower it.





I am a long way from the nearest dealer (600km) so I am kind of hoping to have an idea of how bad this potentially is before I make arrangements to make the dreaded trip! Am I going to need to sell my house to pay for this