Silicone spray works well if you don't want to dismantle everything. Shoot some into the crevices between the trim and the rest of the surrounding area surfaces. I had a similar problem with the "A" pillar trim where it meets the dashboard on the passenger side and the spray alleviated the popping/cracking sounds when the car went over bumps.
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2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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