2007 Mercedes S550
#51
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Join Date: Dec 2018
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2007 S600, 2007 Chrysler 300 SRT8, 2000 C5 Corvette, and 2017 Mustang GT, and just got a 2023 300C
Febi-Bilstein which is OEM and it is still made in China!!!!
Wishing all a healthy and prosperous New Year.
Wishing all a healthy and prosperous New Year.
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doni01 (01-04-2024)
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WRC-LVR (01-02-2024)
#53
Super Member
Thread Starter
Update and not great lol
Sorry for the delay I went away with the family for the new year. So I did a full flush of the heater core which didn’t really give me much results as not much came out of it junk or contamination. Then I went an extra step and did a thorough flush of the entire coolant system using ironite thoro-flush. The coolant color wasn’t as bad as I thought but still I didn’t get any heat from my vents at all. Then I remembered Botus saying that the rest button on the climate controller was for when the car was off and it would give off residual heat. So I pressed the button which stayed on for a whole 2 seconds and then shut. I rear ac vents but not a separate control panel for those vents btw blow even colder air out of them the dashboard vents. I also checked the fuses which are fine. So I have narrowed it down to 4 possible things. It’s the part right before change valve which is the auxiliary pump. The part Botus spoke about behind the front right wheel, the climate controller itself or lastly the climate control module. 2 of those parts I bought used with warranties which also have updated part #s from Mercedes. The auxiliary pump I was able to buy brand new and the part which Botus stated I will have to rebuild as I have YouTube video showing how to do it. Wish me luck as it’s becoming cold in NJ and it sucks driving with no heat. Plugging in the command didn’t make a difference..
Last edited by clb0099; 01-14-2024 at 12:52 PM.
#54
Super Member
Thread Starter
Found this on another post
Looks to be my exact problem.
#55
the rest pumps pump coolant - I guess - mainly through the heater matrix.... so I suspect it may well get you heat (when working)
but I still think the main heater valve (black plastic bit beside the brake fluid reservoir) is electrically turned off - ONLY - because you don't have the comand system plugged in the car.....
but I still think the main heater valve (black plastic bit beside the brake fluid reservoir) is electrically turned off - ONLY - because you don't have the comand system plugged in the car.....
#56
Super Member
Thread Starter
Botus,
my command is connected and still not heat. I was able to take out the (rest) auxiliary pump out but I am having a hell of a time getting the new one in. Anyone have instructions on install?
QUOTE=BOTUS;8907652]the rest pumps pump coolant - I guess - mainly through the heater matrix.... so I suspect it may well get you heat (when working)
but I still think the main heater valve (black plastic bit beside the brake fluid reservoir) is electrically turned off - ONLY - because you don't have the comand system plugged in the car.....[/QUOTE]
my command is connected and still not heat. I was able to take out the (rest) auxiliary pump out but I am having a hell of a time getting the new one in. Anyone have instructions on install?
QUOTE=BOTUS;8907652]the rest pumps pump coolant - I guess - mainly through the heater matrix.... so I suspect it may well get you heat (when working)
but I still think the main heater valve (black plastic bit beside the brake fluid reservoir) is electrically turned off - ONLY - because you don't have the comand system plugged in the car.....[/QUOTE]
#57
unless its got a valve to bypass surely a REST pump not moving would just be a nuisance for the cooling system - thus I don't think the coolant usually travels via the REST circuit (but never looked) , I thought the pump was just an extra to get additional flow when the engine is turned off
why not bypass the heater valve (in the short term) - as something isn't telling it to open from the sounds of it?
(with the car bolted up and connected as std) did you try with diagnostics resetting the madness of the HVAC system ? - multiple bits of user customisable madness available at dealer level fiddling - if they build in magic to turn OFF the AC unless you use dealer tools to reinstate - why wouldn't there be equal charge the customer madness for the heating....
.
why not bypass the heater valve (in the short term) - as something isn't telling it to open from the sounds of it?
(with the car bolted up and connected as std) did you try with diagnostics resetting the madness of the HVAC system ? - multiple bits of user customisable madness available at dealer level fiddling - if they build in magic to turn OFF the AC unless you use dealer tools to reinstate - why wouldn't there be equal charge the customer madness for the heating....
.
Last edited by BOTUS; 01-15-2024 at 08:31 AM.
#58
Super Member
Thread Starter
Botus,
that pump is a huge pain in the was to get out. There is a rubber mounting ring around it. I was able to get it out but putting in the new one is an even bigger pain in the ***. I have to try and figure it out today in 24 degree weather.
that pump is a huge pain in the was to get out. There is a rubber mounting ring around it. I was able to get it out but putting in the new one is an even bigger pain in the ***. I have to try and figure it out today in 24 degree weather.
unless its got a valve to bypass surely a REST pump not moving would just be a nuisance for the cooling system - thus I don't think the coolant usually travels via the REST circuit (but never looked) , I thought the pump was just an extra to get additional flow when the engine is turned off
why not bypass the heater valve (in the short term) - as something isn't telling it to open from the sounds of it?
(with the car bolted up and connected as std) did you try with diagnostics resetting the madness of the HVAC system ? - multiple bits of user customisable madness available at dealer level fiddling - if they build in magic to turn OFF the AC unless you use dealer tools to reinstate - why wouldn't there be equal charge the customer madness for the heating....
.
why not bypass the heater valve (in the short term) - as something isn't telling it to open from the sounds of it?
(with the car bolted up and connected as std) did you try with diagnostics resetting the madness of the HVAC system ? - multiple bits of user customisable madness available at dealer level fiddling - if they build in magic to turn OFF the AC unless you use dealer tools to reinstate - why wouldn't there be equal charge the customer madness for the heating....
.
#59
I MADE THIS UP - NO IDEA IF CORRECT !!!!!!
I'm looking at the heater valve ('170) - on a poor parts schematic - top port seems to be the rest pump (#10)... I wonder if the ARROWS I added, suggests something like the way the coolant MIGHT travel around the heater system with the heater matrix on the ends of pipes 180 and 190 ????
I guess if correct or there about - the pump is not a positive displacement pump and it allows the flow all the time...
I'm looking at the heater valve ('170) - on a poor parts schematic - top port seems to be the rest pump (#10)... I wonder if the ARROWS I added, suggests something like the way the coolant MIGHT travel around the heater system with the heater matrix on the ends of pipes 180 and 190 ????
I guess if correct or there about - the pump is not a positive displacement pump and it allows the flow all the time...
Last edited by BOTUS; 01-15-2024 at 11:30 AM.
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clb0099 (01-15-2024)
#60
Super Member
Thread Starter
So according to another forum member it’s what feeds the heater core.. any shot of you helping me with instructions to removing/installing the pump? I am having a really hard time getting in back in.
#61
yep I was thinking re my picture possibly the correct idea but with arrows ALL back to front
sorry I don't have any instructions on the REST pump... not even sure where it is... its had to fathom why its difficult - is it a big circular mounting bracket... some heat / silicon lubricant ?
loads of pictures of it on this item
https://www.ebay.com/itm/264675569087?
swapped arrows
sorry I don't have any instructions on the REST pump... not even sure where it is... its had to fathom why its difficult - is it a big circular mounting bracket... some heat / silicon lubricant ?
loads of pictures of it on this item
https://www.ebay.com/itm/264675569087?
swapped arrows
Last edited by BOTUS; 01-15-2024 at 11:31 AM.
#62
MBWorld Fanatic!
unless its got a valve to bypass surely a REST pump not moving would just be a nuisance for the cooling system - thus I don't think the coolant usually travels via the REST circuit (but never looked) , I thought the pump was just an extra to get additional flow when the engine is turned off
why not bypass the heater valve (in the short term) - as something isn't telling it to open from the sounds of it?
(with the car bolted up and connected as std) did you try with diagnostics resetting the madness of the HVAC system ? - multiple bits of user customisable madness available at dealer level fiddling - if they build in magic to turn OFF the AC unless you use dealer tools to reinstate - why wouldn't there be equal charge the customer madness for the heating....
.
why not bypass the heater valve (in the short term) - as something isn't telling it to open from the sounds of it?
(with the car bolted up and connected as std) did you try with diagnostics resetting the madness of the HVAC system ? - multiple bits of user customisable madness available at dealer level fiddling - if they build in magic to turn OFF the AC unless you use dealer tools to reinstate - why wouldn't there be equal charge the customer madness for the heating....
.
This is quite nice feature, actually.
#63
yep - in the pictures (with red and green arrows), I was trying to work out where the pipes and parts fit, and I changed my mind after the post you just replied to - [clb0099 then said my arrows were muddled (and I since updated both visions) it makes sense, as the pump probably does go in the that direction] - thus doing all that I think maybe all coolant for the heater circuit (or not) does go round the same circuit as the REST stuff
#64
Super Member
Thread Starter
Botus,
to reinstall this part I need to remove the ac lines.
to reinstall this part I need to remove the ac lines.
#65
that seems drastic... no clearance to reassemble?
...FYI in post#53 the other valve you mention inside the front wing ( I don't believe you have it) - on parts drawings they show two drawings (both very similar) but this valve is not on the std cars - only on cars with option rear heater controls
...FYI in post#53 the other valve you mention inside the front wing ( I don't believe you have it) - on parts drawings they show two drawings (both very similar) but this valve is not on the std cars - only on cars with option rear heater controls
#66
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2008 CL550, 2022 EQB300, 2022 EQS580
Has anyone successfully removed/reinstalled the aux pump? I've got one coming, and was planning to do when I did the heater control valve. However after reading this thread, and looking more carefully at it, it looks impossible from what I can see. The plug connection is on the bottom. I can't even see the screws where it mounts. And I can find WIS instructions. I think I'm going to have to abandon that part unless someone has some good information on how to complete.
#67
Super Member
Thread Starter
Hello,
I am having my mechanic install the pump cause the ac lines need to be removed in order to replace it.
I am having my mechanic install the pump cause the ac lines need to be removed in order to replace it.
#68
Super Member
Thread Starter
Kev,
I just noticed that list article you added is for w211? I have w221?
I just noticed that list article you added is for w211? I have w221?
link from Pelican parts for the removal of teh heater control valve,,,,,,,https://www.pelicanparts.com/techart...eplacement.htm this if for the S550 2008 listed in your sig....
,Figure 8 appears to have both hose nipples there in grey . i would start there.
,Figure 8 appears to have both hose nipples there in grey . i would start there.