2005 SLK front screen not demisting

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ddentrec

Active Member
Joined
Sep 4, 2003
Messages
414
Location
Cambridge
Car
W123 280TE, W123 200T, W203 C180K
Hello everyone,

I have a 2005 SLK200 with standard aircon, 33K miles. Today I noticed that the front screen was misty, so I pressed the front screen demist and the screen did not clear.

This is what happens when the demist is on:

1. Blower fan goes to full speed (correct).
2. Air temp is warm (correct)
3. Air con is on (correct).
4. Blower air flow is NOT directed to the screen - no air felt coming through vents below screen (not correct)
5. All other air flow functions (face/feet/mix) appear to work OK (correct).​

I suspect a flap is stuck or the flap actuator motor has failed.

Does anyone have a photo of the inner ventilation system so I can see how it works? Any other ideas?

Many thanks.
 
air flap

Hello everyone,

I have a 2005 SLK200 with standard aircon, 33K miles. Today I noticed that the front screen was misty, so I pressed the front screen demist and the screen did not clear.

This is what happens when the demist is on:
1. Blower fan goes to full speed (correct).
2. Air temp is warm (correct)
3. Air con is on (correct).
4. Blower air flow is NOT directed to the screen - no air felt coming through vents below screen (not correct)
5. All other air flow functions (face/feet/mix) appear to work OK (correct).
I suspect a flap is stuck or the flap actuator motor has failed.

Does anyone have a photo of the inner ventilation system so I can see how it works? Any other ideas?

Many thanks.
a very complicated vent set up on your vehicle with recirc flaps sticking being quite common. maybe a job for a specialist with a star machine as these flaps can be checked via laptop. hope this helps, steve, merc techy
 

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