I purchased my 1993 300d 2.5 a couple months ago. one of the reasons I chose that car is because the AC worked! Of course, now that I own it the AC stopped working. I have jumped sockets 5&7 at the KLIMA and jumped the wires going to the pressure switch to no avail. The compressor clutch is oily and hasn't been cleaned yet. Any advice on where to check now?

Thanks all!