when my w210 A/C conked out it was the magnet on the compressor pulley, its thermal fuse had burnt out.

The way I verified it was with a multimeter after reset of the climate control unit. The compressor magnet wire was reading 14V when it was switched on but I had no compressor activity.

When I ohmed it out the resistance was in megaohms. New clutch assembly solved it. Lesson learned is that the clutch pulley gap should always be in perfect range otherwise the pulley chatters and overheats eventually blowing the thermal fuse.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)