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      12-11-2016, 12:01 PM   #1
MPowerph
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4-zone Climate control retrofit

Hi everyone. I bought my 2012 535D 1,5 months ago, and I am very happy with it. Awesome car, good spec too. There is one thing, what makes me the feeling, is something missing. It has a upgraded 2 zone climate, so I only get cold air from the rear air vents, even if the outside temperature is low. This is annoying because if I have passengers at the rear, they always complains due they are cold. So because of this, I try to find solution, and I would like to do some modification, as a 4 zone climate retrofit. Have anybody ever done this before? I saw, need a couple of things, like a rear panel, blower, air duct, maybe the front air vents as well, because there is an additional ’warm-cold’ switch for the passengers. I know, the car with the 4 zone c. has an air vents on the B-pillar too, but I think, it is not necessary for the proper operation. I do not know the wires, how does it look like under the centre compartment.
I already found a rear climate panel, and I purchased it. I do not want to buy the rest of the item until I know what I will need exactly. And also, I will need somebody, how can do this retrofit job, because I am not a good handyman, and after the installation it needs to be coded.

I live in Warrington, so if you know somebody, Who can do a job like this, I would be happy to send me the details.

The other thing is, I have perforated leather seats, due the front ones has the active ventilation features, and I found on the internet, the heating elements already installed into the rear seats, just there is now wires and switches to activate them. The panel, what I bought has two buttons for the seat heating, so may it will work after the wiring?!

Thanks!

Last edited by MPowerph; 12-11-2016 at 01:57 PM..
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      12-11-2016, 11:22 PM   #2
Sailorbaz
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I too was under the impression that only cold air come out the rear vents however, last time home I noticed that I did indeed get warm air one of the vents at least, the N/S one if I remember correctly.

Good luck with the retrofit though, I'll be following it with interest.
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      12-12-2016, 01:14 PM   #3
Fox530
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What's all the more annoying is that the E39 had hot/cold controls on the rear vent as standard!
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      01-02-2017, 01:54 PM   #4
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I get warm and cold air from my rear vents, the 4 zone upgrade isn't an option, the fans and fan modules also need to be replaced and I beleive these sit within the dash, it's not a simple case of swapping over the vent plate it's self.

You will have more luck retro fitting rear heated seats. It was quite a common option in the UK so finding a second hand bench and control buttons shouldn't be too hard. try a few breakers.
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