Took the X in for service this week. I had them take a look and listen for the creeking. They pretty well tore apart my back hatch and put some felt tape on all the hard surface to surface trim. All the inside panels and the liftgate panels. Seems to be all gone now except for one squeak near the rear passenger seat. They did really take the time to remedy the situation.

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2013 BMW X6M-current
2013 Audi S4-current
2007 BMW X5 4.8i (E70)-sold