On my leaky 83 turbo drain grommet, I cleaned and de-greased the area and gobbed it up with RTV= no more leaks. With your other leaks, work from top down. Clean, find the topmost leak first then fix. Go to the next lower leak.

My 85 was drenched in oil when bought. I used procedure above and it is now totally dry. Biggest leak was the valve cover gasket, minor leaks from vac pump gasket/bolts, power steering hose clamps, oil filter housing gasket.

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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