Mercedes-Benz 240 D 1979 Owner's Manual page 30

Rapid cooling:
• Turn tem perature sw itch 8
(depressed) and air volume
control knob 1 clockw ise to
the stop.
• Push lever 4 com pletely to the
right and lever 5 com pletely
to the left. Open outlets 7.
• Close side w indow s completely.
(W arm air inside the car may
first be evacuated by driving
briefly w ith all the side w indow s
dow n.)
Mist on outside of windshield:
In dam pweather the outside o f the
windshield may fog. In th is case,
turn lever 4 to the right. Less
cooled air is then supplied to the
windshield.
M ist on inside o f w indow s:
In damp w eather the air cond itio n ­
ing system can be sw itched on in
addition to the heater. M oisture is
then extracted either from the
fresh air or from the recirculation
air, depending upon the setting o f
tem perature sw itch 8. This cooled
and dehydrated air can be reheated
to a pleasant tem perature by po­
sitioning heater controls 2 and 3
accordingly. This action quickly
dries up the w indow s.
A ir C o nd itioning System
Im p o rtan t!
In order to keep the air cond itio n ­
ing system in good w orking condi­
tion at all tim es, it is necessary to
operate the system briefly at least
once a m onth even during the
seasons it is norm ally not required.
Make sure th a t the am bient tem ­
perature is above 36° F (2° C)
since the A /C com pressor w ill not
operate below this temperature.
To avoid annoying cold air, sw itch
blow er to the low est speed only
and turn on the heater, if desired.