Put the gauges on the A/C and found that I had maybe 20psi static pressure.
I added a can of R12, and within 20 secs the clutch kicked in. A second can gave me cold A/C and a 30psi low and 250psi high and with ambient sitting at 85deg F, I was getting 50deg at the vents!

Two problems today....
The key got stuck in the drivers door lock.. took me 20 mins of sweating and wriggling to get it out..
Whats up with that?

Then the CEL came on... can someone direct me to how to read the codes on this model?

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2009 Mercedes ML320 Bluetec