Need help with installing adapter to the replacement fender. VW list part number 5C6-821-215 nomenclature, ADAPTER, in the parts breakdown. To me it seems like a stiffener. The part came un-pliable no peal and stick. It is fiberglass with a dried, assume, adhesive. Body shops here in Kansas have no clue and laugh like it is still the 1970’s for owning a foreign vehicle. They say shooot, just put the fender on, I say VW had a reason that’s good enough for me so I want it that way. The maintenance manual would indicate the procedure, who can afford that luxury.