My 93 300e did the same exact thing. So I took my belt off to see if my car would start ok. After I made shure everything was ok, I took off my compressor, and the allen head bolt that holds my hose assembly to the unit was stripped out. I had cut the high side hose just to remove it. So now I have to replace the whole hose assembly. How far have you gotten with repairing yours.

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Bryan
93 300E 200k
93 Saab 900s 130k
84 Saab 900turbo 57k
85 Saab 900turbo 159k