Climate Control Unit from C-Class compatible with G-Class?
My question is this: The C-Class climate control unit appears to be exactly the same as the G-Class one, and the part numbers even match up after the model identifier. The part number for the G-Class is 4638300185, and the part number for the C-Class is 2098300185.
Does anyone know if the C-Class climate control unit cross-compatible with the G-Class climate control unit?




Certainly if you have a bad knob on the controller you will want to replace it, however, the issue you describe is more often associated with breakage of the plastic servo arms in the HVAC air handler and/or the duo-valve.
Was the digital controller plug-and-play as well? I just ordered one with an included wiring harness.
What you are describing re: the duo-valve seems very likely to be the situation; I greatly appreciate your help. I can probably dig through the forums for the rest of the information I need to get that system operational. I can't say it will help as much up here in Humboldt as it would have during my drive through the 100º+ weather in the valley when I trucked it home, but it will be nice to know that it works ;-)




Diagnostic menu can be read with the procedure:
Last edited by Floobydust; Jun 16, 2020 at 05:06 PM. Reason: forgot something
Certainly if you have a bad knob on the controller you will want to replace it, however, the issue you describe is more often associated with breakage of the plastic servo arms in the HVAC air handler and/or the duo-valve.
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Certainly if you have a bad knob on the controller you will want to replace it, however, the issue you describe is more often associated with breakage of the plastic servo arms in the HVAC air handler and/or the duo-valve.
Will this version work?
https://www.ebay.com/itm/B30-01-05-MERCEDES-W209-CLK320-C230-A-C-HEATER-CLIMATE-CONTROL-SWITCH-2098300285-/304081170450?mkcid=16&mkevt=1&_trksid=p2349624.m46 890.l49286&mkrid=711-127632-2357-0
Last edited by msims1985; Sep 7, 2021 at 05:45 PM.
I also have an AC Playing up . one side hot, both sides hot, than both side cold - all over the place.. i was think of changing the controller but can seem to find a direct replacement on the web.
it is a A463 830 14 85 - 2011 G55
there are a few very similar looking ones on ebay but they are A203 830 17 85. by any chance can you tell if that would work as a replacement?
alternatively is there any harm in trying it if i can buy one cheap?
Thank you.
Certainly if you have a bad knob on the controller you will want to replace it, however, the issue you describe is more often associated with breakage of the plastic servo arms in the HVAC air handler and/or the duo-valve.
Would you be able to point me in the right direction too please.
I also have an AC Playing up . one side hot, both sides hot, than both side cold - all over the place.. i was think of changing the controller but can seem to find a direct replacement on the web.
it is a A463 830 14 85 - 2011 G55
there are a few very similar looking ones on ebay but they are A203 830 17 85. by any chance can you tell if that would work as a replacement?
alternatively is there any harm in trying it if i can buy one cheap?
Thank you.
I also have an AC Playing up . one side hot, both sides hot, than both side cold - all over the place.. i was think of changing the controller but can seem to find a direct replacement on the web.
it is a A463 830 14 85 - 2011 G55
there are a few very similar looking ones on ebay but they are A203 830 17 85. by any chance can you tell if that would work as a replacement?
alternatively is there any harm in trying it if i can buy one cheap?
Thank you.
I swapped my 2005 G500 temp controller with one from a W209 (part # 2098300285) and everything works. Plus it was only like $50 on eBay.
Good luck.
I found overall that it does work, but doesn't work as well as the original unit - fan control isn't as good, auto setting doesn't work that well, temperature control isn't as good, etc. Not to say that the G Climate Control System is really anything to write home about, but this made it noticably worse.
I also tried calibrating the system to get rid of some of the communication errors, thinking they were calibration limits being different - no such luck.
Last edited by shiann; Aug 16, 2024 at 10:33 AM.
I found overall that it does work, but doesn't work as well as the original unit - fan control isn't as good, auto setting doesn't work that well, temperature control isn't as good, etc. Not to say that the G Climate Control System is really anything to write home about, but this made it noticably worse.
I also tried calibrating the system to get rid of some of the communication errors, thinking they were calibration limits being different - no such luck.
I replaced my controller with a used ebay A203 830 17 85 and on first use it worked perfectly. I test drove it for 20 mins and swapped between cold and hot and A/C on/off and it worked every time.
Fingers crossed it keeps working from now on.




I replaced my controller with a used ebay A203 830 17 85 and on first use it worked perfectly. I test drove it for 20 mins and swapped between cold and hot and A/C on/off and it worked every time.
Fingers crossed it keeps working from now on.
I purchased just the controller and replaced the fascia panel to keep the old one.
so far it works well. but one issue I noticed yesterday is when I turn the A/C button it actually turns the A/C off and when the button is not illuminated the A/C is on.
But now i have hot/cold working every time so far.



