I had the same problem.
If you can't get into your trunk at all, look at my diy article "breaking into the trunk without breaking anything". Once you're in, take the mechanism out (2x 10 mm) and use brake clean to degrease then lube moving parts with Lithium grease (not the tumbler wafers). That's what I did to mine a few years ago and still working fine.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked