B. Fresh/Recirculated Air Switch
N19 Air conditioned temperature slide control
S24 Fresh/recirculated air switch
In addition to the temperature slide control there is also a switch (S24) for fresh air/recirculated air operation. This can be used at any time to switch between fresh air and recirculated air, i.e. approx. 80% recirculated air and approx. 20% fresh air. If the switch (S24) or the ignition is switched off, the fresh air/recirculated air flap moves to the position for 100% fresh air.
As of 10/84, the fresh/recirculated air switch (S24) has one electrical and one pneumatic connection (arrow)