Here's how the pros do it. Take off the door panel and get a bunch of little spring type paper clips that are black in color and have two little handles on each end. (or simmilar clips). Spray some 3M Super Trim Adhesive in a cup and use an acid brush to applly the glue to BOTH I repeat BOTH surfaces and ALLOW TO DRY FOR 5 MIN. Next stick them together and clip for an hour or so. All done and it will stay.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM