Mercedes-Benz 190 E2.3 1985 Owner's Manual page 24

0
Press for heating with air conditioned air.
In this type of operation, air is directed to the windshield
and the foot area. The air outlets (8) may be opened or
closed with levers (9) as desired.
0 Press for normal heater operation.
Most of the air is directed to the foot area during heater
operation. A small amount of air is directed to the wind­
shield, just enough to keep it from fogging up during
normal weather conditions. The air outlets (6) and (8) may
be opened or closed with levers (7) and (9) respectively as
desired. Only non-heated air is directed through outlets (6).