The owner' manual for my 1985 vanagon shows the ventilation panel with the slides marked (top to bottom) A, B, C, and D. The fan control is E. Outlets 1 are for the windshield; outlets 2 are for the side windows; outlets 3 are mid-level dash; outlets 4 are footwell. The text is: Levers A and C - Air distribution Lever A at right - windshield (1) and side window (2) outlets open. Lever C at left - footwell outlets under dashboard (4) andfootwell outlets in passenger compartment* open. Lever B - Temperature control To increase heat - slide lever to right. To decrease heat - slide lever to left. Lever D - Roof outlets in passenger compartment* To increase outside air flow slide lever to left. To decrease outside air flow slide lever to right. *where applicable Fan control switch E The air volume can be regulated with three fan speed settings. Defogging and defrosting windshield and side windows Slide all control levers to the extreme right and turn fan control switch E to speed setting 2. The fan control switch for the secondary heat exchanger should be OFF. Warming up vehicle interior quickly Slide levers A, B and D to extreme right. Slide lever C to extreme left. Close air outlets 3. Turn fan control switch E to speed setting 2. Warming up vehicle interior normally Once the windshield and side windows are clear and the vehicle interior is warm, you may want to set the controls as follows: Slide lever A to the left. Slide lever B to desired temperature setting. Slide lever C toward center. Turn fan control switch E to speed setting 1. Outside air ventilation With lever B at extreme left, outside air is emitted from all open outlets. When lever B is moved toward the right, outside air is emitted from open dashboard vents (3) only. Hints All operating controls, except fan control switch E and fan control switch for the secondary heat exchanger can be adjusted to any intermediate position. Stale air is drawn out of the vehicle interior through vents on the inside front door panels. The vents can be opened or closed by sliding the lever forward or rearward.
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