Actually, it blew kind of cold air today. No screeching anymore. Looks like there is 123R, but maybe not enough? What can I do on my own to service the AC without special tools? Maybe it has a leak. The screeching was more of a high whine. I'll have my wife flip the AC switch when I get home from NYC tomorrow night...at least rule out the compressor. Anyone follow Diesel Giant's resoldering plans for climate control? Is that the wrong place to go if all switches work despite lack of chill?
thanks again.

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1982 300cd 245K miles and still goin'...