E-Class (W211) 2003-2009

Heater not working NEED HELP

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Old Jan 3, 2008 | 09:54 PM
  #1  
b_rashed's Avatar
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From: Sacramento California
2007 S550 (S65 Package)
Heater not working NEED HELP

My heater stoped working guys. only cold air comes out. what could be the problem? somebody told me that it could be something called the heater control valve. anybody know about this problem.
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Old Jan 3, 2008 | 10:08 PM
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Eurocharged 2004 E500, Eurocharged ECU/TCU 2005 SL600, 2010 Caddy SwaggerWagon
Originally Posted by b_rashed
My heater stoped working guys. only cold air comes out. what could be the problem? somebody told me that it could be something called the heater control valve. anybody know about this problem.
DAMN MAN! Seems like every week it's something with that car. You parking it near magnets or something?

PM Konigstiger. He'll be able to arm you with the information you need to get it working.
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Old Jan 4, 2008 | 01:54 AM
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Heater Problem

I had the same problem with my 03 E500. It was the heater control valve. After doing a search on "heater" in the W211 forum I was able to find the part#.

The part cost like $50 and the labor was quite easy. Thank You MBWorld!

-Ed
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Old Jan 4, 2008 | 01:57 AM
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Should search for more posts as suggested above. One thread showing the heat exchanger shutoff motor here:
https://mbworld.org/forums/showthrea...exchange+motor
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Old Jan 4, 2008 | 03:09 AM
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Yup heater control valve. The part at my dealership cost me know more than 30 dollars (I get a discount). I repaired it my self and installation I give it a 5 out of 10 for someone with experience.

You have to remove a couple of panels, both wiper blades, and other little moldings here and there. Other than that pretty simple just watch out for the winshield clip.
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Old Jan 4, 2008 | 03:20 AM
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2007 S550 (S65 Package)
thanks guys, i guess that damn labor is gonna get me so im going to be spending around 150-200 bucks AGAIN. im getting really sick of the damnn problems with this car to tell the truth. i wish i could sell it but i wont make any money on it cuz of the upgrades i got for on it. i dont know if im even gonna fix it but thanks again guys.
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Old Jan 4, 2008 | 08:27 AM
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03 E500 and Corvette
Originally Posted by b_rashed
thanks guys, i guess that damn labor is gonna get me so im going to be spending around 150-200 bucks AGAIN. im getting really sick of the damnn problems with this car to tell the truth. i wish i could sell it but i wont make any money on it cuz of the upgrades i got for on it. i dont know if im even gonna fix it but thanks again guys.

Things to expect for either warranty or you pay. So don't be suprised.

Ball Joints
Brake pads every 30K
Heater / water control valve don't know the mileage but I have replaced 1
Ignition key switch
Alignment, tire wear
Maintenance average $500/visit at the dealer.

Just my observations so plan your $$ accordingly.
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Old Jan 4, 2008 | 08:59 AM
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Talking

I had the same problem only getting cold air but that was after i removed the dash and forgot to connect the little plug in the back
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Old Jan 4, 2008 | 10:54 AM
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Originally Posted by tonydr00
I had the same problem only getting cold air but that was after i removed the dash and forgot to connect the little plug in the back
Cars are clearly too sensitive these days
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Old Jan 4, 2008 | 10:58 AM
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Originally Posted by vettdvr
Things to expect for either warranty or you pay.
Heater / water control valve don't know the mileage but I have replaced 1
Can you remember if you replaced it with a part that had the new number:
A2118320584? Hopefully this one lives longer.

Would like to know the EIS issue, perhaps too much off topic.
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Old Jul 15, 2008 | 08:25 PM
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2004 E320
heater control valve

Originally Posted by 6hift
Yup heater control valve. The part at my dealership cost me know more than 30 dollars (I get a discount). I repaired it my self and installation I give it a 5 out of 10 for someone with experience.

You have to remove a couple of panels, both wiper blades, and other little moldings here and there. Other than that pretty simple just watch out for the winshield clip.
Are there any special tools required or anything special to worry about (ie releasing vacum presure etc.)?
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Old Jul 18, 2008 | 02:14 AM
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05 clk 55 conv., 03 E500, 01 E55, 03 F350, FJR1300....
Heater control valve. Had the same problem. Crapy design by MB, water/coolant enters the small electric motor in the valve and corodes the terminals. One of the few parts on a Benz that is actually cheap to replace.

Its located under the driver side windshield wiper (under the plastic cowling).
You will have to remove both windshield wipers, then unclip the plastic cowling, remove wiper motor and linkage, undo clips holding coolant lines in place (needle nose visegrips work prety well). Its tight in there but not too difficult to do. Takes about 1 hour.
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Old Jul 18, 2008 | 02:33 AM
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2004 E320
Originally Posted by mere320
Are there any special tools required or anything special to worry about (ie releasing vacum presure etc.)?

no special tools required...here is a simple DIY i posted last month.


https://mbworld.org/forums/showthrea...&highlight=diy
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Old Jul 18, 2008 | 04:31 AM
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My heater acts up every now and again. I guess I need to look into replacing that Heater Control Valve.

Good luck and hope you get it fixed.
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Old Sep 8, 2008 | 03:50 PM
  #15  
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Thanks for the info and links to the threads. I'll definitely try this and let you know how it works out.
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Old Sep 8, 2008 | 03:57 PM
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a car
no one suggested checking your coolant level?
that is the first place I'd start (as per 'general automotive knowledge'), and then I'd see if the thermostat is bad.

I understand the valve seems to be a common fault, but there could be other reasons too... (just saying)

good luck!
G.
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Old Sep 10, 2008 | 12:16 PM
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Thanks for all of your help, especially W211 Ryda. Your photos and directions really helped.

Took me about 2 hours, probably because I'm always paranoid about breaking something.

Did the project, heat works great!
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