Well, that it the terminology your chassis uses..
So.............................
Here are your two switches and they are as I posted earlier.

PIGTAIL sensor:

http://catalog.peachparts.com/ShopByVehicle.epc?q=1994-Mercedes--Benz-E4--0-Climate--Control&yearid=1994%40%401994&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6396%3AMBC%7C1530%3AED%7C10000072%40%40E420&catid=242213%40%40Climate+Control&subcatid=242240@@A%2FC+Temp%2E+Switch&mode=PA


Here is the SPADE sensor:

http://catalog.peachparts.com/ShopByVehicle.epc?q=1994-Mercedes--Benz-E4--0-Climate--Control&yearid=1994%40%401994&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6396%3AMBC%7C1530%3AED%7C10000072%40%40E420&catid=242213%40%40Climate+Control&subcatid=242239@@A%2FC+Pressure+Switch&mode=PA

And as I also told you , if you jumper the spade sensor , I doubt that you will have that turn your comp ON b/c I suspect you have an R charge.
SO, go check the FUSE is a first start in Diagnosis.

You can now see why we check the R pressure FIRST..............................................

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A Dalton