Replaced the compressor, the condenser and the pressure switch, Recharged the system, no leaks, no other issues. No matter what I do the system thinks the car is low on refrigerant gives code B119184. System will not turn on. Ebay order pressure switch? II have ordered another one. What am I missing? What else should I check?

 

There is no pressure switch.
There is a pressure and temperature sensor.
Check actual values in diagnostics.
Don't buy parts from ebay.

 

My. value is 0.0. bar., hence the replacement sensor. My apologies for calling it a switch. for the record, I didn't purchase the sensor, nor did I purchase the Chinese made condenser, or the used Compressor. I am an Aston Martin tech, was a MB tech years ago. I am just helping a friend's father who cannot afford this car. The Compressor blow up in a big way and I noticed the receiver dryer was filled with debris. Last time I messed with this cars was like a 2008-09 S550 with the old 5.5 273 motor, heck I started MB life working on M117 cars then M119 V8s, So I'm old. And Yes I agree, don't by junk, especially when its hours to replace.

 

Yes system will not run with sensor reporting 0.
​​​​​​Check output at sensor, if correct check wiring and control unit.

 

Is the only pressure sensor off the condenser? Just figure I would ask, I have seen nothing on tech about it. Just didn't want to find out there is another one off evaporator or elsewhere.

Thanks

 

Yes IIRC only pressure sensor near condenser.

 

Replaced with legitimate pressure sensor, recharged, system works correctly.