This is not a blower issue, as the blower works fine. It is an issue of air temperature. I get hot air even with the compressor engaged, and I know the compressor is really not compressing because the temperature of the refrigerant lines is ambient. Then all of a sudden, randomly, I'll start getting cold air again. But there is no evidence of it being a blower/ducting/flap problem, so my eyes are on the compressor as the culprit. I've just never heard of a fully engaged compressor that can sometimes compress and sometimes is not compressing.

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Treiberg's Collection: 1981 240D, 1985 300SD, 1992 300E, 1997 E300D, 2005 C230K