Our 97 C280 (wife's ride mainly) seems to have just developed this problem of side vent sending out warm air recently and I was wondering what may be the reason. Another thing I hope could delay on as funds is limited for now.

On the side, thanks for you folks advice on the knee panel removal and I was able to find wire to tap into later for hooking up radar detector. May be I could get some picture up when done hopefully this month.

Also, is it easy to drain and replace the coolant on the C280? Could someone point me to the location of the drain plugs and correct procedure? I am contemplating doing it myself if it is not too involving.Ont the other hand, I think I shall leave the fuel filter to the shop as the location seems a beast to get to with only jack stand.