S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Replacing the ac water valve

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Old May 25, 2012 | 08:42 PM
  #1  
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From: Malmo Sweden
W221 S550L, W212 E250CDI Wagon
Replacing the ac water valve

Does anyone have a guide for replacing the ac water valve??

My a/c is blowing out super hot air to the rearsests and wont really cool the front either, the system is full we checked that, I put star on it and it said ac water valve not working and a small picture that it should be located inside the passengerside fender.

I took everything apart today but simply couldnt find it?? I have the webasto heater from the factory so only thing I can imagine is that maybe its behind that??
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Old May 25, 2012 | 09:24 PM
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From: Fairfield county, CT.
2004 Ran SRT-10,2007 S550,2016 E400c
Ac water valve? If your talking about the rear heater core shut off then its in the pass front wheel well.. towards the rear by the door its the only thing in there cant miss it
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Old May 26, 2012 | 04:21 AM
  #3  
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From: Malmo Sweden
W221 S550L, W212 E250CDI Wagon
http://www.euromotives.com/i/ebay/fs/1316085073.jpg

It is this one??

i looked in the passenger side and it was completely full of all kinds of things but i couldnt find this one
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Old May 26, 2012 | 02:01 PM
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2019 S450
I think you must remove the passenger front wheel and there is a access panel on the rear of the wheelwell..
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Old May 26, 2012 | 03:39 PM
  #5  
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From: Malmo Sweden
W221 S550L, W212 E250CDI Wagon
I had the wheel and inner fender out because STAR said it was located towards the door but only thing in there is my webasto.. There is a valve a little simalar to the valve i got but it only has 3 hoses coming in and the new one 4 plus it was full of radiator coolant when i removed one of the hoses
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Old May 27, 2012 | 02:09 PM
  #6  
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2019 S450
You found it!
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Old May 27, 2012 | 02:18 PM
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W221 S550L, W212 E250CDI Wagon
But then it doesnt make sense there is 3 hoses on the current and 4 on the new? I talked with MB and he confirmed the part no is correct for my car
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Old May 27, 2012 | 07:46 PM
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One would be for water in. One for right heater core. one for left heater core.. Wonder what the 4th one is for..
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