The Yorks are pretty durable, but tend to be rough and noisy. Make sure all the mounting hardware is present and secure. Especially the bracket that goes from the bottom of the comressor and bolts to the motor-mount arm's attachment studs at the engine block.
After so many years, the clutch-pulley bearing may need replacing, as well as the compressor shaft seal. Find a parts place that has an old Murray AC catalog if you need these parts. If you do need to remove the pulley and replace the beaing or shaft seal, and plan on sticking with R12, you might consider a larger compressor pulley assy, I've had good luck fitting a larger than stock compressor pulley on some small-engined / low power vehicles, so the engine isn't working so hard and runs cooler, at the expense of some AC performance at idle.
If your 220D has a working aux electric radiator fan, it may be possble to wire it, via a relay, so it comes on with the compressor, instead of waiting for the fan's temp-sensor on the AC receiver-drier, thus improving AC idle performance a bit.

Happy Motoring, Mark

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DrDKW