Mercedes-Benz 300 TD-TURBO DIESEL 1982 Owner's Manual page 35

O Bi-Level ventilation — Heating
The setting g corresponds with setting § but, in
addition, the air is being cooled or preheated as
necessary.
§ Bi-Level
This setting is necessary for clearing a fogged
windshield. As soon as possible, reset to | | or f§
In the heating mode, air will be channeled to the
windshield, the leg room and to the movable nozzles (2);
in the cooling mode, additionally to the movable
nozzles (1).
In the heating mode, air will be emitted from the movable
nozzles (1) at times.
Automatic Climate Control