Door lock and Heater Question......
The middle two vents are only for cool/cold air. All of the outer vents are for the warm/hot air. I remember someone in a previous thread somewhere posted the flow diagram. It might actually have been on the w210 Tech CD.
My most recent experience with this resulted in door not locking, then locking on it's own, speed/vibration undulations, courtesy interior lights would sometimes work, sometimes not....lights outside would not blink when Smartkey locked, and panel switch would not lock doors. The replacement of the switch did the trick....for all the above anomalies.






