In June of this year I bought a 04 C4S roadster...lovely car, great ride with top down! It is now winter in the US North East. Today was a beautiful but cold day and I took the car out......put the defroster on when I saw some condensation forming at the bottom of the front windshield.....the vents at the bottom of the front windshield started throwing out little bits of dark gray foam intermittently and all the windows inside the car including the rear view mirror got so foggy that I could not see well enough to drive the thing after a few minutes. Nothing I did with the climate control remedied the situation. Warm air was indeed coming out of the vents but, I would guess, the air somehow contained moisture which, in turn, caused the fogging. Before I take it to a Stealer Dealer to deal with the issue, has anyone experienced this problem and, if so, provide some help/guidance on how to remedy the situation. Much appreciated.