I have had this car for about a year and a half, without a/c. Im tired of not having it, especially since I live in Houston, TX. I dont know too much about why it doesnt work, but my dad says that there is somthing wrong with the compressor or something. Ill try to get some more information soon, but if anyone has a simple answer that would be great. Thanks.

The AC system on these cars seems to be fairly troublesome, probably due to the age of all of the parts of the system. I choose to just remove mine while swapping the engine and not worry about it anymore. Of course now it looks like I may get a job in your neck of the woods.

Try this for starters: http://www.dieselgiant.com/repairyourac.htm

I have a compressor from the 1980 300SD engine I am swapping into my 240D available if you are interested.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

Your car uses the York compressor which are pretty stout units but they can be a pain. Use the pictorial to do some test on it. Ask if you have more questions.

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1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair

Cool, thanks. I hope that I can fix it, because I really dont want to give up my car for a new one just because of no a/c.

i have a 76 300d, also with no a/c, belt wasent on it when i got it, so i assumed it was off because it didnt work (did the serizure test, compressor does not seem to be seized) it doesnt get too hot here in lex, ky, and the heat works (somewhat) so its all good

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76 300D 108,110 miles
99 Saturn sl1 80,000 miles - moms
91 Grand Marquis 45,000 miles - Grandparents
97 Ford F150 - 16,000 miles - Grandparents
73 Ford Monarch (parked 65,000 miles - Grandparents