Need A/C Comp Speed Sensor Resistance Specs!

[9bluenights]

Hey guys, I cant seem to find this info anywhere? Hopefully you guys know. I need to know what the Normal operating resisitance Specifications are for an A/C Compressor Speed Sensor on a 1990 Mercedes 500SL 5.0L.

Thanks guys, I need a quick response if at all possible

[tecqboy]

There's a speed sensor on the A/C compressor??? I never knew that. Do you have a picture? I have a 1991. I could look at mine for you if I knew what to look for.