I am trying to troubleshoot my car's AC (it's hot!). It's a 2005 E320 wagon with the two-zone system. The controller seems to be OK-but the compressor never comes on. The charge pressures seem normal (static low-pressure measured 100psi on a 98 degree day). The diagnostic computer says the pressure is 10 bar-way higher than it actually is. Can anybody give me the static readings I should get off the refrigerant temp/pressure sensor (two sensors in one housing)? Also, where is the line that activates the valve in the compressor? None of the diagrams I got from Star Info or WIS spell this out. Lots of block diagrams, but I want to know what wire to probe!