Steamed up windscreen and windows. Air con drain?? Door seals??


New Member
Feb 7, 2013
I have a 2001 C180 Coupe (w203 I believe)

When I leave my car for a few hours in the cold with all windows closed etc, the front windscreen gets extremely steamed up and foggy. Its impossible to see out of unless I wipe with a towel. When I have been driving for a while the de-mister keeps it at bay, but Im having to run the de-mister 90% of the time i'm driving.

I have heard it may be something to do with some sort of 'drain pipes' or could it be a problem with my door seals?

Any info would be great! As I have no idea where to start, and am not really sure what or where the 'drain pipes' are.

Thanks in advance. Joe

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