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E-Class (W211) 2003-2009

Are the climate control unit interchangable?

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Old Apr 8, 2009 | 12:19 PM
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Are the climate control unit interchangable?
Has anyone tried this?
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Old Apr 8, 2009 | 05:09 PM
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In another world, can I put install the unit on the first photo if I currently have the one on the 2nd photo?



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Old Apr 10, 2009 | 12:37 AM
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Yes, it will connect, but it will not work properly and will give trouble codes. The one in the top picture is for a quad-zone climate control system. The one in the bottom picture is not, and this is what will cause the problem.
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Old Apr 13, 2009 | 09:48 AM
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I had my 2 zone climate unit changed to 4 zone unit without any problem
just plug & play
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Old Apr 13, 2009 | 10:35 AM
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Originally Posted by shtsai
I had my 2 zone climate unit changed to 4 zone unit without any problem
just plug & play

That's nice to know...

beside the cosmetic, did you find any gains by doing this?
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Old Apr 14, 2009 | 09:54 AM
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Frankly speaking , it is just a cosmetic
No gains but looks much better than dial unit
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Old Apr 14, 2009 | 10:21 AM
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I would have expected worse AC performance when the 4-zone unit does not see all the sensors it expects and not all actuators (like those controlling the rear/side air nozzles).
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Old Apr 14, 2009 | 10:30 AM
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Originally Posted by Diesel Benz
I would have expected worse AC performance when the 4-zone unit does not see all the sensors it expects and not all actuators (like those controlling the rear/side air nozzles).

Is this confirmed? This was my first Benz when I bought it and I didn't know what to look for. After years of owning it and finding out more about the "other features" I'm beginning to wish that I had done my research.
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Old Apr 14, 2009 | 11:47 AM
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contact MBenzNL, i'm sure it can be done...
i saw one with dual climate zone for the 1st time a few days ago... definitely needs upgrade...
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Old Apr 14, 2009 | 12:44 PM
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Originally Posted by dannieboiz
Is this confirmed? This was my first Benz when I bought it and I didn't know what to look for. After years of owning it and finding out more about the "other features" I'm beginning to wish that I had done my research.
No, I was just speculating how the control unit would behave when for example the more complex sun sensor (that it is built to operate with) is not present. It might ignore a missing sensor properly, or not. Those who have done the conversion must know from experience (at least roughly).
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Old Apr 14, 2009 | 01:08 PM
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