airvents

Hi, I have noticed that if I put the AC on airflow from center air vents is fine. The issue is when I put the heater on there's no air flow from passenger side vents (including side vent from passenger side). Its a right hand drive car. What could be the issue for no heated air from...

Hi Chaps, difficult one to describe but at the top of the centre air vents on a 2007 w204 there are 2 small oblong shaped rubber bits/bungs that the radio cover sit on when shut. I have had one missing since I bought the car. I can get one off eBay but I have to buy the entire centre air vent...