One trick for locating the noise is to duct tape the areas till you cut the sound. Cover each new area with out removing previous tape until you solve it. You of course need to decide if its the door seal or the door window seal or the winshield seal or the sunroof... the noise can transfer inside the roof or body.

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Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician