E-Class (W211) 2003-2009

A/C warmer on drivers side

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Old Feb 16, 2022 | 05:59 AM
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ilium007's Avatar
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2003 E240
A/C warmer on drivers side

Second issue - the A/C is blowing warmer on drivers side (right hand side in Australia) vs passenger side. I cycled the temp control from min to max 6 times as I read on these forums and while it does get hot when I bring it back to min it is still slightly warm, certainly nothing like the passenger side. I read on these forums that this can either be a refrigerant issue or a mixing valve issue.

Not sure where to start looking.
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Old Feb 16, 2022 | 12:09 PM
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2004 E500 wagon
Low charge would be my first bet.
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Old Feb 17, 2022 | 01:06 AM
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2003 E240
Originally Posted by amosfella
Low charge would be my first bet.
I'll book it in tomorrow to have it re-gassed. Could this be an issue with the duo-valve? I assume this is mixing coolant to each side of the vehicle.



I found this video on replacing it:

Last edited by ilium007; Feb 17, 2022 at 01:23 AM.
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Old Feb 17, 2022 | 10:03 PM
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2003 E240
Re-gassed this morning and A/C is ice cold from both sides but.... UV dye showed leak at compressor front seal. Told I need to replace compressor, TX Valve and Receiver Drier but due to the age of the vehicle there are no parts available. Is there a possibility of getting this compressor rebuilt (new seals) or am I done for?
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Old Feb 17, 2022 | 10:55 PM
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2004 E500 wagon
Compressors are available. Need to replace the drier. TX valve IMHO is a 'make work'/'pad the bill' item.
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Old Feb 18, 2022 | 01:44 AM
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I found a very local MB wrecker who can supply a good 2nd hand compressor. Evidently there are 2 models of compressor, how do I get in to see the par number on mine or is there a way to find what part# compressor is on my vehicle? VIN: WDB2110612A252738
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Old Feb 18, 2022 | 11:22 AM
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'71 Pinto

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Old Feb 18, 2022 | 10:58 PM
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Originally Posted by konigstiger
Thanks again @konigstiger
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