Ok i have a clk 320, year 2000, and i have huge fogginf problem on the front window and back window and the door windows, to the point where i cant see the road, now the foggin up occurs inside the car, so i can wipe it off, and the heater gets it off in a mtter of seconds but i have to put it on full power, and it happens alot. I cant keep the heater on the whole itme because its loud and REALLY hot. Please help! is this a malfunction in this model?