C200 W202 steamy windows?

[sam-orr]

Hello again,

Does anyone else have a C200 W202 that when you put the heater on in the car the windscreen mists up?
Mine has done it the whole time I have had the car and has recently had a new screen put on and still does it.

 

[andy27168]

Hi,
When mine was like this it was because the pollen filter had got wet because of blocked heater box drains, the heater box is located just in front of the screen under the bonnet i actually cleaned mine out when I had a new screen fitted while it was apart.
Cleaned out drains, new pollen filter solved my issues.

 

[streethawk]

Hi mine does it when you start up as the climate control kicks in even without fans on! It mists bottom of screen for a second and then clears! I believe this is the aircon system which causes this and is perfectly normal. Unless you mean its misted up for an age then I would say andys spot on. Carl.