Where in WIS can I find repair of CL 500 W216 Heater Change Over Valve? And the Cabin heat sensor in the overhead panel.

[Submariner1]

I can’t seem to find them anywhere, Looked under Engine, Engine Electrics, Heater, and Climate Control etc.
Does anyone know the Number of the Section or exact heading where I could find this?
I assume this is the valve?


nice to find, to determine if one can get it out, with just the small section of the firewall removed (nice and easy .. remove rubber seal, cut out 2 cable ties and pull up firewall insert)
or does one have to take out the tray under wipers and that means taking off the wipers.

Likewise can one use hose clamps , or is it easier to syphon off some Coolant, to below this valve.

Apparently there were some changes in 2009, Code 809 (ref a single big battery) that mine has, that affect the trim ref removal.

Some say there is temp sensor in the overhead unit. One part of this trim was broken when I bought the car. Ouch seriously expensive! So I don’t want to break anything like that. Be cheaper to have the whole job done in MB!
Do they mean the cluster by the rear view mirror or the Dome thingy in the centre of the Roof Liner? It does have invisible “Vents“ in it.



Any views on this problem? The Heater just is not hot. On a cool day you need it on 28C settings (previously 22-23C was great for me) . On a colder day this now even needs boosting to HI from time to time.
Coolant level has not dropped, no oil in Cap, And the the Oil Cap is clean no white foam. ( so I assume there is no crossover of oil or water ).
Engine takes 2 miles to get to 80C from stone cold and another mile to get to its normal running temp of circa 88C. Never overheats.

So I think its either this Heater Change-over valve or the main temp sensor ( as all air outlets are equal heat ).
what puzzles me is on Hi setting the air is toasty hot?? ( hence my second thoughts about a central thermostat ).
Reading the blurb … this system is Megga Complex, multiple outlet temp sensors, sun sensor, mist sensor, humidity sensor , windows and sunroof compensators, leg area sensors …..
So praying its something simples

any help welcome.

 

[mersum1es]

There is much more space if you remove wiper system, it is acually pretty easy off/on job.

Wiper system removal AR82.30-P-6400TX
LHD water valve removal AR83.25-P-1140TX

 

[Submariner1]

There is much more space if you remove wiper system, it is acually pretty easy off/on job.

Wiper system removal AR82.30-P-6400TX
LHD water valve removal AR83.25-P-1140TX

Thanks I will check those out - much appreciated.

 

[Submariner1]

Hi Mersum
Re Wipers …. Looking on my system under heading
Section 82 Electrical System Body
- 82.30
There is only AR82.30-P-6100 sx for my car a CL 500 no AR82.30-P-6400TX? .
if I used your no, it could not be seen on the menu list for my car, but a “direct” search presented your document. But Saying Model 219.3
The number you gave looks like it is for a Model 219, that I think is a CLS 500?
This was however still very helpful because it lead me to Section 82, and hence the correct AR For a W216 wiper removal
.
But
Re the Heater Changeover Valve not so lucky.
I looked for your number AR83.25-P-1140TX on the menu and no luck.
The section 83 Climate Control
- 83.25 Automatic Heater
with the Nearest AR number to your no is AR83.25-P-1100sx but thats for a Removal of the whole Heat Exchanger.

If I put your number into a direct search, I see your Doc but its for a Model 219.3 looks like a Heater Changeover Valve, and says “Remove/Install heat exchanger shutoff motor” (so sounds about right) but it looks slightly different, with a very different layout to my actual car.
Sadly scouring all the AR83.25 offerings when set for my VIN No. didn't give my equivalent AR. For a CL 500 W216..

Spent hours going through sub groups, No luck
any idea where this could be.
MB call it different things
In EPC its a “heater changeover valve’ in system descriptions its called a “AC Water Valve Y19/2”
Many thanks
Peter

 

[mersum1es]

Dang! I am sorry... my sight seems to fail, I read your car is CLS500, not CL.... so I posted wrong model info (which I had available on my laptop hdd)

True, valve system is probably different than CLS. BUT, WIS document location should be approx the same since function is same. Have you tried search in WIS (yes, it is from stone age but occasionally it do find something), I think it is under same sub group than C219 water valve. I might dig further tonight, I think I must start my SDS anyway to read xenon fault codes.

 

[Submariner1]

Dang! I am sorry... my sight seems to fail, I read your car is CLS500, not CL.... so I posted wrong model info (which I had available on my laptop hdd)

True, valve system is probably different than CLS. BUT, WIS document location should be approx the same since function is same. Have you tried search in WIS (yes, it is from stone age but occasionally it do find something), I think it is under same sub group than C219 water valve. I might dig further tonight, I think I must start my SDS anyway to read xenon fault codes.

Thanks,
when I saw the Model 219 was a CLS I guessed that.
I had hoped the Heat Change over valve would be in the same sub group. But its not, or I missed it … blurred vision after 2 hours looking.
I suspect it might be because this car has “fancy” AC.
I also can’t find that domed Sensor cover in the middle of the roof. (See pic). I had heard you can clean them, and suspect it too as it kept falling out when I got it. Some of the clips had broken so replaced it. But you really need to know where to push or they snap. And I was horrified by the price if memory serves me well it was like £129 ! Discounted.

Any help much appreciated.
Generally I will not fiddle with anything critical on that engine, but armed with full WIS instructions I might go for this one.

I seem to have a little “list” of issues all at once.
regards
Peter

 

[mersum1es]

Hi again...

yeah not in same place... it was really 83/25 in C219...

I can't find it either...
EDIT:
But EPC finds it, it is called water change-over valve and part number is A230 830 00 84 (216.394 car) AND it IS under 83 subgroup, 182 hot water lines or independent heating... I guess WIS is just missing that part huh????

Edit2 ANd I find it in WIS table of contents, Y19/2 it is in 83.40 subgroup

 

[Submariner1]

Hi again...

yeah not in same place... it was really 83/25 in C219...

I can't find it either...
EDIT:
But EPC finds it, it is called water change-over valve and part number is A230 830 00 84 (216.394 car) AND it IS under 83 subgroup, 182 hot water lines or independent heating... I guess WIS is just missing that part huh????

Edit2 ANd I find it in WIS table of contents, Y19/2 it is in 83.40 subgroup

Many thanks, its very weird; thats exactly the results I saw.
Very odd they show it for the CLS but not the CL model.

Really bugs me when one can not find things logically.
And similarly I can not find the Sensor tging in the middle of the roof between the sunroof and the rear window.
you would think that is in Panelling and lining but no!

Hopefully one of the Indies might see this post and know its tucked away somewhere odd.
Or there is a glitch in WIS.
regards
Peter

 

[Submariner1]

Well I found the Central Roof Sensor, its actually only a motion and sound sensor for the Alarm.
So explains why I could not find it anywhere near climate control or heating sensors LOL!

So just need to find the Heater Changeover Valve AR.

 

[Botus]

part 170 - its common to need to replace them

FG 216.371 - HOT WATER LINES > Mercedes EPC Online > nemigaparts.com

Parts catalogs. Spare parts catalog Mercedes EPC Online. Mercedes. Car. HOT WATER LINES.

nemigaparts.com

 

[mersum1es]

Yes we know pat but WIS info is missing... which is weird...

 

[Submariner1]

part 170 - its common to need to replace them

FG 216.371 - HOT WATER LINES > Mercedes EPC Online > nemigaparts.com

Parts catalogs. Spare parts catalog Mercedes EPC Online. Mercedes. Car. HOT WATER LINES.

nemigaparts.com

Thanks I found it in EPC but can’t find in WIS , do you know the AR doc number … please or what section / sub section .
regards
Peter

 

[mersum1es]

Thanks I found it in EPC but can’t find in WIS , do you know the AR doc number … please or what section / sub section .
regards
Peter

Btw try under W221, many things looked be the same...

 

[Submariner1]

Many thanks to Alex at AMF
for his kind and detailed pm. Shame he is not near me.
Apparently it‘s not provided for my CL500.

 

[Submariner1]

Btw try under W221, many things looked be the same...

Very good idea . They do share a lot of things.
Not sure how you look up a model without a Vin number.
will fiddle tonight.

 

[mersum1es]

Very good idea . They do share a lot of things.
Not sure how you look up a model without a Vin number.
will fiddle tonight.

You can select just car - model - etc..

 

[Submariner1]

You can select just car - model - etc..

Thanks

 

[Submariner1]

Btw try under W221, many things looked be the same...

Hi Mersum
Looked it up and the S Class 500 w221 with the same engine 273 and nothing there
Very odd as there are some procedures in WIS that are blindingly simple, yet not this job.
ai suspect it is hidden somewhere, which can only be een once you search something else.

 

[Botus]

if you still have the original screen pop the cover over the wiper blades off and it will be simple

if you have aftermarket screen, merc allegedly have a patent on bonding the retaining strip to the screen - the rest use self-adhesive tape for it, and that wiper trim cover doesn't survive first install without tearing it off the screen - let alone maintenance at a later date - it dangles and looks **** - if the fitter is particularity unskilled and or its very cold it can be so bad you get strange nosies with air flow in the worng place and of course rain water in a bit merc expected to be dry its whole life - right up untill leaf litter clogs the worse screen drains I have ever seen on any car

 

[Submariner1]

if you still have the original screen pop the cover over the wiper blades off and it will be simple

if you have aftermarket screen, merc allegedly have a patent on bonding the retaining strip to the screen - the rest use self-adhesive tape for it, and that wiper trim cover doesn't survive first install without tearing it off the screen - let alone maintenance at a later date - it dangles and looks **** - if the fitter is particularity unskilled an or its very cold its so bad you get strange nosies with air flow in the worng place and of course rain water in a bit merc expected to be dry its whole life - right up untill leaf litter clogs the worse screen drains I have ever seen on any car

In one regarding the 3x windscreen drains. Luckily I changed my battery early, crap overflows there. Fortunately no rust, just in time.
I made up little set of tubes to plug into a 3000w wet and dry. And suck em clean every month in autumn,
mental design!

I noticed a few variants of the wiper trim, hence my desire to find the exact WIS instructions, as mine looks kinda different.
my problem is the garage is full, big bench, 300mm radial arm saw, pro mower, huge air compressor … so car stays outside.

Hence I don’t want to be stranded with an incomplete job facing 5 days of rain and cold!