I have a really annoying rattle coming from the rear of the vehicle. Sounds like a trim piece somewhere in the hatch area. Dealer changed the soft close mechanism, but it is still there. I removed the cargo cover and all contents to try to isolate the rattel and the gremlin is still persistent. Anyone have a similar problem? Any ideas?

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