When I mityvac the green line at engine I can not hold vac at all.
Is this right.
WHat vacuum # should I be getting at the green line?

I tried another 300d car and got same results. Other car works fine. a/c wise.

No matter how much vacuum I apply to the (green) climate control line on engine side I can't get the "off" button to turn system off. Thats what confusing me.

I plugged ignition and door lock lines to pull only on climate line with mityvac.