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Old 08-26-2007, 11:51 AM
saumil saumil is offline
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Join Date: Aug 2001
Location: Houston, Texas
Posts: 393
The pressure switch is a 2 function switch, will close when pressure is above a lower limit and below a upper limit.

I just looked at the wiring diagram for a 1990 300E and there is not much involved in compressor cut-off, much less than my 87 260E. There is a pressure switch, a compressor speed signal and a engine speed signal.

Need to know for sure whether the compressor is cutting off at higher RPMs or not !!
Saumil S. Patel
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