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Hello, its most likely a broken window regulator cable hence the grinding noises. I looked but do not have a schematic of door panel removal on your car. The best I can tell you is to look closely around the arm rest or door handle area of the door for hidden screws or panels to remove that reveal screws. Once you find and remove them door panel will pull straight off at the bottom then work you way up pulling outward. Finally push straight up on panel to release it from the clips on top of panel. Hope this helps you!!! If you need more help let me know!
2003 Jetta left rear window blue plastic part of the