Mercedes-Benz 300D 2.5 1990 Owner's Manual page 25

3 Bi-Level ventilation - Heating
I Q Bi-Level
This setting is used if the inside of the windshield begins
to fog up, ice up or when wet snow is falling. As soon as
the windshield has cleared, reset to g o r 0 .
In the heating mode, warm air is supplied to the w ind­
shield, foot area, and the outlets (8). Additionally, air may
be emitted periodically from outlets (6), depending on the
interior temperature.
In the cooling mode, cool air is supplied to the windshield,
foot area, and outlets (6) and (8).
Note:
In warm, humid climates, prolonged use of this setting
may create condensation on the outside of the windshield,
directly above the defroster ducts.
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