The AC in my 85 300D has been working well all summer since I added R134 to it this spring, until yesterday, when I did not feel any cool air coming out of the vents. Opened the hood and saw smoke coming from the compressor clutch, which was engaging and disengaging.

I will try spraying some brake clean on the friction surfaces and then a clutch gap adjustment if that doesn't help. Has anyone done a gap adjustment recently and can go over the procedure and tools needed? I played around disassembling an R4 a few years ago but can't remember an details.

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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