CRAIGXLH1

Hi group my 01 C 320 air condition still not working need. I change both the broken Stepper Motor levers. my AC gauges
reads now running low side 100 high side also read 100 I have no alarms. thank group

tjts1

Is the center of the AC compressor pulley spinning with the belt? If not, your compressor is toast, time to replace it. There is not clutch on this compressor.

CRAIGXLH1

the center bolt of the AC compressor pulley is spinning I recheck the my AC gauges
reads now running low side 60 high side also read 60 I added of photo of my AC compressor from my parts catalog
thank

tjts1

Ok, so if the center of the pulley is spinning next thing to check is the light on the EC button turn off when you press the button If it does that means all the inputs to the ccu are working properly and it's telling the control valve to activate the AC. If it's not working at that point the only failure point left is the compressor control valve. It's something like this.
https://youtu.be/xMrU4XimsoI
It's a vw video but the Mercedes ac functions the same way.