Well, it got warm and the Benz is hot!

Checked AC high pressure switch and found continuity which says system should let compressor engage. Gage hooked up to low pressure side shows > 100 psig with compressor off at ~ 80 F.

Coolant temperature sensor has low resistance when cold and increases when hot to appropriate numbers.

Pulled relay and found there is power and the control switches call for the compressor to turn on.

Jump the compressor and it runs and air starts to blow cold.

Don't have voltmeter to measure low ac voltage so can't check voltage in speed sensor circuit but there is not resistance when the system is off.

Does this look like I need to have the compressor replaced?