[DRACO A5OG]

It must be in translation but the picture high lighted in red should not have the top two knobs positioned that way, it is confusing.

Top knob is for Off (left) Full Fan (Right). my 85 has the additional opening of the inlet without the fan until the middle then the fan engages beyond the center of the track.

Middle dictates Fresh Air flow to the Floor (left) Windshield (right) both Floor and Windshield (center)

Bottom is for heat distribution to the Floor (left) Windshield Defrost (right) center for both.

My personal settings are:

Top Center (it increases naturally as I increase speed on the road)
Middle Right
Bottom Left

For Defrost:

Center Heat control to Maximum
Top Right
Middle Right
Bottom Right

For Maximum Fresh Air:

Top Right
Middle Right
Bottom Left

Just my observations.