Does it rattle with the AC on? Try various settings in the AC system to see if you can isolate it down to that.
I am willing to bet a screw fell down there or a piece of plastic chipped off something and is causing your endless headaches.
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2016 X3 35i |M-Sport|Megan Racing Coilovers|FBO+|BM3|Jordan Tuned|Valvetronic Designs|
1998 750iL V12|2017 440i|2019 991.2 GT3RS Weissach|2019 Model X|...and some others
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