Air Distribution
WARNING: This page is about a different car, the 1997 Volkswagen Passat. However, it is still accessible from the selected car via links, so may be relevant.
Air distribution control knob directs airflow. With knob at 7 o'clock position, floor vents are open. With knob at 10 o'clock position, defrost vents are open. At 2 o'clock position, dash vents are open. At 5 o'clock position, floor and dash vents are open.