Air distribution in the IHKR E46 is carried out by an actuator .
The link plate 1 is driven by the air distribution flap motor . An air flap in the heater unit is positioned by this link plate 1. The air flap directs the flow of air in the various ventilation modes .
The air distribution microswitch 2 informs the heater/air conditioning control unit of the position of the air flap. Two cams are mounted on the link plate for this purpose.