to AC or not to AC...that is the question - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 06-21-2015, 07:00 AM Thread Starter
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Date registered: May 2014
Vehicle: 1980 240d
Location: Richmond,VA
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to AC or not to AC...that is the question

1980 240d-daily driver-freaking awesome!

I am sweating like a whore in church now that summer is here. Was told the PO wrecked the system by trying to put "new" ac juice (ru12 or?) . Have never tried to use/activate.

Couple of questions for the brain trust:

1)is it worth it to replace? I drive 150 mile/day at 75mph usually, would this make overheating an issue?
2) buy new compressor, dryer, expansion etc....?
3) DIY project? I do everything now but no AC experience.

any thoughts would be appreciated
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post #2 of 3 (permalink) Old 06-21-2015, 08:03 AM
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Date registered: Dec 2005
Vehicle: W211 E320 Bluetec R129 SL500 - $1300 car ........ Ford F350 6l
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I suspect PO wanted to convert R12 to R134.
The conversion work, but it has to be done right.
You have older car, so getting compressor that is designated for R134 might not be easy.
I would inspect what you have on the car. If the compressor is not frozen and the system holds vacuum for 1 hr you might be good to go.
R12 gets pretty expensive, but members posted positive results with substitutes.
Also finishing R134 conversion might be the option.
No matter what you do - new drier is highly recommended.

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post #3 of 3 (permalink) Old 06-21-2015, 01:01 PM
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If your system has not been retrofitted to r134a, I would consider retaining the r12 and see if you can get a refill. I had a w126 retrofitted years ago to r134a and it was not as cold as the r12.

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