I have a 1985 300SD and it seems like the AC compressor is about to go. I say this because it's making an unusual amount of noise, leading me to believe that the bearing will soon go. I also noticed around the pressure lines that lead into the unit, what appears to be compressor oil(clear, not black like diesel oil)

It is not gone yet as it is still relatively cool. My question is, do I just replace the compressor with a new one? Or do I have to go Compressor, expansionvalve etc...

Fastlane does not carry the compressor. If someone can provide the model # to purchase from GM, I would appreciate it.

Thanks