59 degrees would not be cool enough here in the Texas heat. I finally got my system thoroughly flushed and recharged after installing two new compressors (the first one failed). At cruising speed, I get an indicated 33 degrees, 40 while in stop-and-go driving. My interior is black and seems very difficult to cool down, but this A/C is doing an admirable job. THIS is why I went back to R-12!

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Matt
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1995 E300 Diesel (Die Blau Frau)