I've just finished an overhaul of my 92 300d's cooling system. Belt tensioner system, aux fans, ect...ect..

I also replaced a number of the AC components b/c the compressor would cut off after a VERY short clutch engagement. I figured it was due to the belt/tensioner system being busted and the compressor's free-wheel sensor cutting it off. That has proved to be the case b/c now my compressor is running like a champ as expected.

However, one question that I have for the expert panel.
I was seeing what I "think" are higher than normal high pressure side PSI readings.

Ambient temp was 75* out, but very very humid,
I'm in SC and it was actively raining, and I work in a steel building/storage unit deal.

low side: 29 - 40psi (compressor on - compressor off)
high side: 150 - 300 psi (compressor off - compressor on)

I really don't like that high side number as most references are saying that should be 170psi on the top end of the high side. What I'm reading is that high of a high side, might be a sign of blockage. Then again, the mercedes documentation says 24bar which is 348psi... so need a sanity check for the good people of the forum.

The good thing is I've got very very cold air. I'm putting a temp sensor on the vents today for "real" numbers.

I've got a new drier (behr china one that doesn't have a sight glass), new pressure switches, and new expansion valve. The system held 29-30" of vacuum for 10 hours so we are a tight ship.

A little confused by this one. Hell, I might even be a little low but I added 960g of r134a in a completely evacuated system. That was in the middle of the the two competing Mercedes documents. The R12-R134a conversion document says 900g and another document says 1000g.

Thanks for any help!

Images/Large Sizes
http://i.imgur.com/9rTaIL6.jpg
http://i.imgur.com/PFSx4SA.jpg
Imgur

Mercedes Documentation
http://w124-zone.com/downloads/MB%20CD/W124/w124CD1/Program/Climate/83-608.pdf

Generic Mastercool document: http://www.mastercool.com/media/89660-INST_web.pdf

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JH
87' 560SL