2005 e320 cdi apparently low in refrigerant or has a leak, i pulled it from storage after 1.5 yeara of non driving, drove for 2 hours w ac then 2 days later ac light blinking and nothing but hot air, problem is i cant add refrigerant because while ac light blinks clutch wont engage, so i cant add refrigerant.

The AC compressor has no clutch. You can add refrigerant at any time.

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My reusable hose is bad maybe? I cant get any r134 to come out of can

Pay attention to what kind of can adapter you have. They changed the design recently for a self-sealing can. Old can taps that puncture the top will not work with the new cans.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]

But i press the trigger on my adapter while not on valve and it sprays but not while on low pressure port

May be the low pressure valve is not opening? Press the schroeder valve and see any r134 comes out. Or put a charging valve on it and open the valve. The can is of much higher pressure than the system. The refrigerant should go in whether the compressor is running or not.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.

The low pressure valve does open when i press it and it does have refrigerant. Im in awe at why i can spray freon with adapter de attached and can press valve and have it spray but i cant transfer freon to the car

One time i was able to transfer freon while car was off but i stopped in fear of causing harm

You need a hose with a pressure gauge and a scan tool that can tell you what's going on with your AC. Right now you're trying to play ball in the dark.

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CENSORED due to not family friendly words