Clockwork, you get that hitch installed? Mine went in a couple of weeks ago, still haven't towed anything. See my post for a couple of pointers during the install process, though the old original install thread was a great help. Also - note the tricky points about the hitch shaft and ball: OEM shaft w/2" ball from ECS is the way to go, as aftermarket short shafts [nmt 8"] aren't there. If you plan to pull a substantial trailer, one with a 2 5/16" mount, you'll need to shop for a 1" shaft ball in that size, too. All should note the very high torque specs for ball mounting.

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2006 X5 3.0 6-spd w/Evo UUC ssk
sport/premium pkgs
born Valentine's Day, 2006.