The relay would be blown potentially because it sat not moving for a while, and seized up randomly?

Jump the compressor clutch. The wire with the brown stripe is -, the other is +. (although reversing will not hurt it if you just do it for a second) directly to the battery with a switch. When the switch is engaged or you hold the terminals together at least, the clutch should click into place. It could potentially have failed.

If the A/C cools with the clutch jumped, then it's something further up the chain. If you're sure the evap. temp, pressure and temperature switches are good, as is the "compressor wanted" switch in the cabin, then it's a relay.

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1983 Mercedes-Benz 240D
Automatic, A/C, Power Sunroof, Power Right Side Mirror
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