System is low on freon. I jumped the clutch with 12 volts and it works. Then I jumped the low pressure switch and checked for voltage at compressor feed wire circuit with climate control on and there is none.

Checked for voltage where the Klima is plugged in and I have 12v. Then I took apart the Klima and found the coil was not pulling the switch. Jumped the coil and I get power to the compressor feed wire. BUT, these Klimas are weird and EXPENSIVE birds, and there could be some other "feed" into the Klima that is not getting there. So before I get rid of it I need a procedure to test the Klima itself to verify its bad.

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1981 300D 147k
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1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
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I love the smell of diesel smoke in my hair