Quote:
Originally Posted by Larry Delor
The hissing sound makes me wonder if your switch isn't some sort of manual air recirculation switch. Take out the glovebox, and see if the activation of said switch make the recirc flaps move. If they don't move, look and see what does.
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The manual air recirculation switch is the rocker switch oriented horizontal on the left side of the blower slider switch. That light is aftermarket as far as I can say compared to my 1984 190D.
Happy Holidays
Kevin
1979 240D manual
1984 190D manual