kweisner

My X164 (2009 GL 450 Gasoline US) A/C is not blowing cold air--problem started intermittently and is now permanent. All other functions, such as heating, interior fans, damper/flappers, exterior electronic fan all seem normal.

I purchased a code reader and am getting thee faults:

9006: A9 A/C Compressor Short Circuit
9208: B31 Smog Sensor sensor cable short circuit open to ground
9208: B32 Smog sensor sensor cable open circuit

Looking for anyone's experience with these and what is involved in repair, hoping of course this does NOT require compressor replacement!

Not really sure where to start in terms of wires to check, or other diagnostic. Thanks in advance for your help!

SPryma

Did you get it fixed? I have the similar problem. Sometimes I have 9006 errors and warm air, sometimes i do not have the error and cold air. Where was your problem?

omarqureshi2744

Any luck on your issue ? I have the same issue - Intermittent cooling - have replaced 5 compressors so far, each one lasted a few weeks before dying out completely

TX07GL450

https://mbworld.org/forums/gl-class-...ompressor.html

SPryma

So the solution for me was to solder a diode (the previous post), but it was a temporal fix and a year after in 2021 my compressor finally died and I replaced it by the MB Genuine one, because the third party compressors may not have that diode inside.

SPryma

It helped me in 2019