DIY: Installing a new Changeover/Heater Control Valve
Senior Member
Joined: Aug 2014
Posts: 380
Likes: 1
2006 E55 AMG
I'll be doing this on the weekend. Thanks for a detailed write up!
Edit: Looks like my problem is fixed! As others have said, removing the wiper assembly is easy enough, and gives a lot more space to work.
Does anyone have the part number for the large plastic trim piece under the wipers that runs the width of the car? Mine is old and has chunks missing where it connects to the window.
Edit: Looks like my problem is fixed! As others have said, removing the wiper assembly is easy enough, and gives a lot more space to work.
Does anyone have the part number for the large plastic trim piece under the wipers that runs the width of the car? Mine is old and has chunks missing where it connects to the window.
Last edited by uraberg; Aug 30, 2014 at 11:01 AM.
Newbie
Joined: Oct 2013
Posts: 1
Likes: 0
04 E320
Remove wiper linkage to make easier
Excellent tutorial. I just finished replacing the heater valve. Ended up with minor cuts trying to work around wiper linkage. Two 13mm nuts and one 13mm bolt allowed me to move the wiper linkage completely out of the way and really gave me the needed room to finish the job. Didn't have to disconnect electrical...just moved out of the way.
Junior Member
Joined: May 2011
Posts: 16
Likes: 3
Mercedes S500 - 1999
Excellent tutorial. I just finished replacing the heater valve. Ended up with minor cuts trying to work around wiper linkage. Two 13mm nuts and one 13mm bolt allowed me to move the wiper linkage completely out of the way and really gave me the needed room to finish the job. Didn't have to disconnect electrical...just moved out of the way.
Also, does anybody have a tutorial f
to replace the dual valve (I believe it is under the front mudguard)?
Thanks,
daniel
Newbie
Joined: Mar 2006
Posts: 7
Likes: 0
From: North Vancouver,BC
2014 E63 sAMG
Execellent DIY. My 211 E55 encountered the "no heat" issue Friday while driving to Whistler.
Logged on here Friday night and found this tread. Prepared to do the repair this week however heat returned yesterday on my drive back,but not for about an hour.
Wife drove car Friday morning and whwn she camy get something to work she will start pushing all the buttons. (car had been at dealer the day before and they shut everything off when its being worked on). Did my wifes button punching do something or is it only a matter of days before I go to no heat mode again?
Paul
North Vancouver,BC
Logged on here Friday night and found this tread. Prepared to do the repair this week however heat returned yesterday on my drive back,but not for about an hour.
Wife drove car Friday morning and whwn she camy get something to work she will start pushing all the buttons. (car had been at dealer the day before and they shut everything off when its being worked on). Did my wifes button punching do something or is it only a matter of days before I go to no heat mode again?
Paul
North Vancouver,BC
Junior Member
Joined: May 2011
Posts: 16
Likes: 3
Mercedes S500 - 1999
Member
Joined: Sep 2009
Posts: 197
Likes: 3
From: St. Louis, MO
2005 E55 Sedan (Peuter)
Canuck1: Execellent DIY. My 211 E55 encountered the "no heat" issue Friday while driving to Whistler.
Logged on here Friday night and found this tread. Prepared to do the repair this week however heat returned yesterday on my drive back,but not for about an hour.
Wife drove car Friday morning and whwn she camy get something to work she will start pushing all the buttons. (car had been at dealer the day before and they shut everything off when its being worked on). Did my wifes button punching do something or is it only a matter of days before I go to no heat mode again?
Paul
North Vancouver,BC
I believe it's very likely to happen again. It's only a matter of time because the valve fails mechanically. The teeth between the motor and the flap get stripped maybe. I never opened it up after I replaced it, but I definitely noticed a ticking sound like the sound of plastic teeth rubbing against each other after it failed.
Your wife did solve the problem, tho, even if just temporarily! At least that's what you should tell her :-)
Junior Member
Joined: May 2011
Posts: 16
Likes: 3
Mercedes S500 - 1999
Rear air conditioning
[QUOTE=kurtwz;6219282]Are you talking about how to replace the stepper motor for the heater? If so its this thread, first page : https://mbworld.org/forums/e-class-w...rol-valve.html
Hi kurtwz,
Not sure if this is what I need to change. My problem is that the rea seats AC does not get cool air, only gets hot or room temperature air, while the front seaats AC works without a problem. Somewhere I rread that this is a problem from some dual valve situated under the front fender or mudguard. What is your opinion?
Hi kurtwz,
Not sure if this is what I need to change. My problem is that the rea seats AC does not get cool air, only gets hot or room temperature air, while the front seaats AC works without a problem. Somewhere I rread that this is a problem from some dual valve situated under the front fender or mudguard. What is your opinion?
Newbie
Joined: Dec 2005
Posts: 6
Likes: 0
From: Nashville
1991 300d 2.5 turbo diesel
Just used this great write-up today on my 05 E320 CDI.
As mentioned it's much easier to just pull the wiper assembly which adds 2-3 min. to the entire job, but saves a lot of major effort.
I did Not read close enough and could have easily completed the job is less hen an hour, but was trying to twist out the outter hose connection. Not good as it's pinned and must come straight out, took me 20 min to figure that out.
On my CDI removing the engine cover creates a lot more room to access the outter connection.
Thx for the site & info.
As mentioned it's much easier to just pull the wiper assembly which adds 2-3 min. to the entire job, but saves a lot of major effort.
I did Not read close enough and could have easily completed the job is less hen an hour, but was trying to twist out the outter hose connection. Not good as it's pinned and must come straight out, took me 20 min to figure that out.
On my CDI removing the engine cover creates a lot more room to access the outter connection.
Thx for the site & info.
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Newbie
Joined: Oct 2013
Posts: 2
Likes: 0
Merc c203
That was a great description, and it encouraged to me to do the job myself, particularly because, in England, the local MB specialist said it was a day's job. The reason for that is that these cars are designed for left-hand drive and then adapted for right-hand drive countries. This means that while the heater change-over valve remains in the same place, the right-hand drive cars have the brake master cylinder and servo moved to the right and positioned right on top of the valve, which makes its removal/replacement doubly difficult. The only way to get the new valve back into place is to ensure that all 4 hoses are removed from the car, and are connected to the new valve before forcing the valve and hoses back into place under the brake master cylinder. Working this out meant it took me a day and a half of putting the valve in and taking it out several times. So, if you have a right hand drive model, be prepared for a lengthy job; there is a YouTube video posted by another Brit which shows the problems that I encountered - but overcame in the end!
Junior Member
Joined: Jan 2015
Posts: 23
Likes: 5
E270 cdi W211, E350 cdi W212, ML350 BlueTec W166
Just changed mine couple of weeks ago. RHS.
1. remove brake unit (BOU), hardest part. Need to deactivate the SBC, remove accelerate pedal, brake pedal, flush brake fluid.
2. replace vale.
1. remove brake unit (BOU), hardest part. Need to deactivate the SBC, remove accelerate pedal, brake pedal, flush brake fluid.
2. replace vale.
Member
Joined: Oct 2014
Posts: 222
Likes: 2
From: Melbourne Australia
MY06 E55
Junior Member
Joined: Jan 2015
Posts: 23
Likes: 5
E270 cdi W211, E350 cdi W212, ML350 BlueTec W166
About 2 hours removing BOU,
20 minutes removing vale,
few minutes cleaning up.
15 minutes putting new vale,
20 minutes replacing BOU (once you know how to remove, it's much easier to reverse.)
You will need WIS instructions.
It took me 3 hours to flush brake fluid. (First round failed.) Must follow every step carefully.
You will need DAS.
It's worthy. You will have your cooling back, also smooth and responsive braking.
20 minutes removing vale,
few minutes cleaning up.
15 minutes putting new vale,
20 minutes replacing BOU (once you know how to remove, it's much easier to reverse.)
You will need WIS instructions.
It took me 3 hours to flush brake fluid. (First round failed.) Must follow every step carefully.
You will need DAS.
It's worthy. You will have your cooling back, also smooth and responsive braking.
Newbie
Joined: Dec 2013
Posts: 2
Likes: 0
'06 E320 CDI, '07 E350 4-matic, '84 450SL
Which heater control valve?
This is an excellent DIY thread. Thanks to all who contributed.
There are two different heater control valves listed for the 2006 E320 CDI. One IS for cars WITH Auxiliary Heater (code 228) and one IS NOT for cars with Auxiliary Heater (code 228). Can anyone help me determine which part number I need? I do not know what the Aux Heater code 228 means or how to determine if it applies to my vehicle. VIN WDBUF26J66A955110.
There are two different heater control valves listed for the 2006 E320 CDI. One IS for cars WITH Auxiliary Heater (code 228) and one IS NOT for cars with Auxiliary Heater (code 228). Can anyone help me determine which part number I need? I do not know what the Aux Heater code 228 means or how to determine if it applies to my vehicle. VIN WDBUF26J66A955110.
Member
Joined: Mar 2012
Posts: 156
Likes: 3
From: New York
2005 E320 CDI
This is an excellent DIY thread. Thanks to all who contributed.
There are two different heater control valves listed for the 2006 E320 CDI. One IS for cars WITH Auxiliary Heater (code 228) and one IS NOT for cars with Auxiliary Heater (code 228). Can anyone help me determine which part number I need? I do not know what the Aux Heater code 228 means or how to determine if it applies to my vehicle. VIN WDBUF26J66A955110.
There are two different heater control valves listed for the 2006 E320 CDI. One IS for cars WITH Auxiliary Heater (code 228) and one IS NOT for cars with Auxiliary Heater (code 228). Can anyone help me determine which part number I need? I do not know what the Aux Heater code 228 means or how to determine if it applies to my vehicle. VIN WDBUF26J66A955110.
Newbie
Joined: Dec 2013
Posts: 2
Likes: 0
'06 E320 CDI, '07 E350 4-matic, '84 450SL
Thank you for the prompt reply and information. Unfortunately, I'm not located near any dealers. The car is a North American model so based on your comment, it has the Aux Heater?
211-832-05-84-M22 NOT for cars with Aux Heater (code 228)
211-832-06-84-M22 for cars with Aux Heater (code 228)
What is code 228?
211-832-05-84-M22 NOT for cars with Aux Heater (code 228)
211-832-06-84-M22 for cars with Aux Heater (code 228)
What is code 228?
Member
Joined: Mar 2012
Posts: 156
Likes: 3
From: New York
2005 E320 CDI
Thank you for the prompt reply and information. Unfortunately, I'm not located near any dealers. The car is a North American model so based on your comment, it has the Aux Heater?
211-832-05-84-M22 NOT for cars with Aux Heater (code 228)
211-832-06-84-M22 for cars with Aux Heater (code 228)
What is code 228?
211-832-05-84-M22 NOT for cars with Aux Heater (code 228)
211-832-06-84-M22 for cars with Aux Heater (code 228)
What is code 228?
You could call a service advisor, they might help. It's a good thing to have your car's code list.
Code 228 is the electric aux heater. It warms the interior before there is sufficient heat in the heater core.
Now I'm going to double check the part I replaced. It did not solve the problem that I was having.
Junior Member
Joined: May 2011
Posts: 16
Likes: 3
Mercedes S500 - 1999
Merc S500, 2000 model. I had a problem with the rear air conditioning for quite some time. The front AC would be nicely cool, but the rear always blew hot air, even with the temp set at low. Not related to that, I installed a new AC compressor. Now, the front AC is still ok and the rear now is nicely cool too!!! However, I set the rear temp to low and, after awhile it sets itself to 22 degrees celcious. So I need to keep changing it back to low. Strange behaviour, but certainly happy that rear passengers can now enjoy cool air in the summer. Any ideas why??
Junior Member
Joined: May 2011
Posts: 16
Likes: 3
Mercedes S500 - 1999
Merc S500, 2000 model. I had a problem with the rear air conditioning for quite some time. The front AC would be nicely cool, but the rear always blew hot air, even with the temp set at low. Not related to that, I installed a new AC compressor. Now, the front AC is still ok and the rear now is nicely cool too!!! However, I set the rear temp to low and, after awhile it sets itself to 22 degrees celcious. So I need to keep changing it back to low. Strange behaviour, but certainly happy that rear passengers can now enjoy cool air in the summer. Any ideas why??
Senior Member
Joined: Apr 2004
Posts: 393
Likes: 2
From: Mesa, AZ
2011 E350 Bluetec, 1996 S320 & 2006 E320 CDI Sold to my son & 2017 GMC 2500 Diesel Pick up
Merc S500, 2000 model. I had a problem with the rear air conditioning for quite some time. The front AC would be nicely cool, but the rear always blew hot air, even with the temp set at low. Not related to that, I installed a new AC compressor. Now, the front AC is still ok and the rear now is nicely cool too!!! However, I set the rear temp to low and, after awhile it sets itself to 22 degrees celcious. So I need to keep changing it back to low. Strange behaviour, but certainly happy that rear passengers can now enjoy cool air in the summer. Any ideas why??
In my S320 I had a simular issue bit it was from side to side. (maybe the back / never sit back there) drivers side blew cool the passanger side blew hot no matter what it set the temp to. It was the Duo Valve - they get dirty or clogged. I bought a used one off line after googling it. It also can be rebuilt if your so inclined.
