A lot of my torsional stress creak was relieved when I removed the C pillar trim. Take those off and see if it continues. If not, felt tape the hell our of that piece and hope it works. Did for me. I even removed the rear deck and felted the plastic vent and that helped 95% of any creak go away. Now, when it is hot or the car has been sitting in the sun, it will creak more until the pressure/heat in the cabin levels.
2009 e92 M3 Individual Laguna Seca Blue
|Black Novillo|DCT|19"rims|Carbon Leather|Premium|Tech.|Heated Seats|Prem. Sound|iPod|
Mods: |Electronic Performance Steering Wheel|ZCP CF Spoiler|ZCP CF Spliters|ZCP CF Mirrors|Edition Front Grilles|Edition Side Grilles|BMW Performance Brake Handle|3D Design Pedals| Style Rumore Exhaust|H&R Springs|LCI Tails|Challenge CF Door Panels|