aerobat

I've got a 2001 C320 and recently turned the A/C on this past week and noticed it wasn't operating. The EC mode is stuck on, which I know means there is an error with the A/C system. I've been able to access the diagnostic mode which provides the sensor readings, but I can't seem to find how to access the trouble codes. Anyone have any suggestions?

I've also noticed that the refrigerant pressure is reading 3-4 Mbar. Does anyone know the proper pressure?

Thanks,
Andrew

aerobat

Closing the loop here: it turns out the software controlling the A/C system was locked up. Mechanically, there was nothing wrong with the system. Took the car to my indy who reset the system through the STAR. 3 years later, no future problems.