I have a 1986 300E. The AC works great when the wheel for the temperature setpoint is set to the coldest setting. If the wheel is any other position the center vents close and I have hot air blowing out the side vents. At first the AC worked fine for about 10 minutes after you started it up. Then the center vents would close and the heat would come out of the side vents. Is it one of these pods going bad? Thanks for your help.
Bill