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Here is the procedure to remove the panel.
Removal CAUTION: To avoid breakage of door pull cover(s), insert a screwdriver diagonally between pull strap and chrome bracket. Snap out both sides then remove.
NOTE: The following procedure must be used during removal and installation of the door armrest and trim panel. Refer to the appropriate illustrations for component and vehicle model identification.
NOTE: Do not use front door trim panel to remove trim clips from door inner panel. Replace any bent, damaged or missing push pins.
Remove the panel with the wondow up or down it does not matter. Once the panel is removed remove the mirror assembly.