[Mike X]

Hi Guys ,
Got a bit of a problem with my SLK R171 , 2005 , 350 .
When I try to demist the windscreen by turning up the blower speed air only comes out of the passenger side vent at the base of the screen , the drivers side remains fogged up .
I have tried the search function but to no avail , I even wondered if it could be the filter or a blocked pipe or a stuck flap , not sure where to start .
Anyone else had a similar problem ?
Thank you .

Mike .

 

[jbanks15]

do you have automatic climate control or manual?
are all the vents open?

 

[jbanks15]

get your free datacard for kicks anyway

http://www.slkworld.com/vehicle-data-card/67706-free-how-get-free-datacard.html

http://www.mbusa.com/vcm/MB/DigitalAssets/pdfmb/ownersmanual/2005_slk350_slk55amg.pdf

page 172/173

page 176

 

[curro101]

It could be a stuck flap/motor on that side, perhaps Seanhump might have a better idea from his investigations on the climatronic retrofit !

As Jeff asked, do you have the manual or digital climate controls ?

You may have to get it hooked up to a Star/DAS diagnostic machine to see if it throws any light on the subject....

 

[Mike X]

Thanks guys , it's the manual type .
Yes all vents open , all blow very well , even tried the recirculating button on and off a couple of times , no change .
It does seem like a stuck flap somewhere ???

 

[efair]

I don't think there are separate controls for the flaps left and right, the only left vs right control is the temperature which is accomplished by the duo valve. Maybe something is blocking the vent, or the flap has somehow come apart?

I don't think the duo valve could prevent de-misting.

I've never seen one of these airboxes disassembled.

 

[nick9one1]

I've done this on a C class and its an all day dashboard out job. But that was a different car so its possible you can get to the stepper motor more easily on the SLK.

as mentioned before ^ I think there is only one stepper for the windscreen.

Does the car make any clicking or tapping noises when yo turn on the key to pos 2 (but don't start it)? This is usually a sign of a slipping motor/connector/gear on one of the steppers.

Here are a few pictures of an rhd SLK heater box so you can see what you're up against.

fortunately parts are cheap - Mercedes SLK-Class R171 Heater Stepper Motor 2038201642 A2038201642 | eBay

 

[efair]

Nick,
What are the red lines?

 

[TonyS3]

Close all four face vents?
This directs all the air to the screen.
TonyS

 

[nick9one1]

Nick,
What are the red lines?

Sorry, I should have explained - the two big white openings pointing upwards are the windscreen vents. the red lines are one long bar that connects the two sides. The thing on the left is the stepper motor that turns the rod to open close the vents.

 

[etyu]

Is there a photo tutorial on how to disassemble the dash and reach to these components? I presume there is a WIS document for this.
Perhaps I have to browse the service CD more often (not enough time).

 

[Mike X]

Thanks nick , that is really usefull .
Tried that Tony , doesn't make any difference , the right side blows like crazy the drivers side is still as good as shut .

 

[nick9one1]

I didn't read your initial post properly, if only one side is staying closed it almost certainly isn't the stepper motor (as one motor turns both sides). The drivers side must be spinning on the rod that runs between both vents. (red arrows in pics) if this is the case, I think the only thing you can do is replace the while heater box

you might be able to poke something like a wire coat hanger down the windscreen vent and push the flap open. If it works you'd permanently have the vent open, but thats much better than having it closed.

The w203 c-class had tons of these problems, but I've never head of it on the SLK.

 

[nick9one1]

... and this is how much of the dash had to be disassembled on my c class to fix a similar problem.

 

[Mike X]

O.M.G. think I will try the coat hanger , thanks again Nick , that's awesome .

 

[willie212]

Mike, did the coat hanger work. having the same problem with mine.

 

[jbanks15]

Mike, did the coat hanger work. having the same problem with mine.

fyi
Mike has not been on since
Last Activity: 06-15-2016

let's try a notify @Mike X