Mercedes-Benz 380 SE 1984 Owner's Manual page 34

Automatic Climate Control
0
Economy setting - Ventilation
0
Normal setting - Cooling
0
Economy setting - Heating
0
Normal setting - Heating
0
EC (ECONOMY) = Economical setting;
the air conditioning compressor stays off.
In any other settings, the air conditioning compressor
comes on with ambient temperatures above
+ 2 ° C/36° F.
We recommend this setting to be used with cool
outside temperatures, so the air conditioning
compressor stays off in order to save fuel.
In the blower operation, air is emitted from outlets
(4), (5) and (6) only.
In the heating mode, air is primarily supplied to the
foot area. In addition, air is also supplied to the front
doors. Only enough air is supplied to the windshield
and air outlets (5) and (6), in order to keep the glass
defogged in normal weather conditions. In the heating
mode, air will be emitted periodically from outlet (4).
With cold outside temperatures, the fresh air supply
and the fan remain turned off until the engine coolant
has warmed up slightly.
0 Normal Setting
We recommend this setting with humid and warm
outside temperatures.
The setting 0 corresponds with setting 0
in addition, the air can be cooled or heated as
necessary.
but,