You will need a window regulator to repair this. I have replaced hundreds. I am sorry, this is not a do it yourself project. You have to drill out the rivets and reinstall them. They require a special tool to do so.

You will have to go to an independent or a dealer.

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Benzmac:
Donnie Drummonds
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS