And if you do get it open, do a search for the pano roof fix posted here and elsewhere online.

In a nutshell, this guy from Australia who fixes sunroofs for a living shows you what parts to hack off of your sunroof rails and mechanism to make it reliable. It basically disables the tilt function which is what usually breaks and jams up the roof.

No need to pull the sunroof, it can be done in place. Has to be able to open though to expose the parts.

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04 X5 3.0i auto
03 X5 4.6is