Just thought I would write and say that everything is done!!

I replaced the exp. valve, drier, and all the O-rings in the system. I put my remanufactured York in, and filled it with Ester 100 oil. I put about 8 oz of oil in the system total, maybe a little more.

I then drew a vacuum on the system with a little cheapie Harbor Freight air compressor vacuum. Worked pretty well, down to about 26 inches. Good enough for me.

After letting it sit on vacuum for a while, maybe 30 minutes, I started putting R-134 in, while jumping the clutch together. I put the leads back on the pressure switch after the first can and it held on after that. I put in 3 12 ounce cans total, for 36 oz of freon. The 240D system holds 41.6 ounces by the book, I believe, so this is 87% of the original R-12 capacity. Sound about right?

Anyway, the whole thing seems to work pretty good. Not a professional job, but it didn't cost me an arm, leg, and left kidney either. I wouldn't mind if it got colder at the vents, any suggestions?

Thanks to all who help on this forum. I would have not even attempted this job without you all. This site really makes it possible to own one of these old Mercedes.

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'79 240D 4 speed manual 105k miles