Mercedes-Benz 450 SL 1980, Owner'S Manual

Page: 23 / 81

Automatic Climate Control
The autom atic clim ate control is
designed to maintain the desired
tem perature in the vehicle interior.
Heating, cooling and air distribution
(top, center, bottom) are controlled
automatically. The blow er speeds
w ill be varied autom atically depend­
ing on the push button setting,
operating and tem perature
conditions.
The autom atic clim ate control is
operational only if the engine is
running.
For adaptation to the w eather con­
ditions various functions can be
selected with the pushbuttons. A ir
outlets 8 - 9 must then be adjusted
as required. Buttons 2 - 6 can be
pressed only individually. The
indicator lamps in the individual
buttons come on if the buttons are
pressed and the vehicle lamps are
switched on.
1 Tem perature selector wheel
The desired tem perature in the
vehicle interior can be set with
the selector wheel.
Norm ally only one adjustm ent is
necessary fo r the entire year.
If required to be altered, only
slight adjustm ents should be
made to this tem perature
setting.
2 “ OFF” button:
Switching off the autom atic
clim ate control.
Sim ultaneously the fresh air
supply to the vehicle interio r is
cut off. This position can be
briefly selected in the case of
odorous or dust annoyances or
when passing through an auto­
m atic car wash.
3 “ AUTO -LO ” button:
Normal vehicle operation.
This setting w ill provide heating
or cooling of the ve h icle ’s in­
te rio r depending on the selector
wheel setting and the outside
tem perature. If heating is re­
quired, the fresh a ir supply and
the blow er w ill remain in the off
position until the engine cooling
w ater is sligh tly warm ed up.
Only then w ill warm a ir enter the
interior of the vehicle and be
distributed m ainly to the foot-
w ell outlets. A sm all amount of
air is directed to the w indshield
to ensure defogging under nor­
mal w eather conditions. For the
defogging of the side windows,
air can be diverted from the side
outlets 9 depending on the posi­
tion of levers 10. The center out­
lets 8 remain closed during
heating operation.
If cooling of the interio r is re­
quired, the blow er w ill start
im m ediately regardless of en­
gine tem perature. The air is
routed via center outlets 8 into
the ve h icle ’s interio r and addi­
tionally via the side outlets 9
depending on the position of
lever 10. No air is allowed to
flow to the w indshield and to the
footwell. The blow er speed will
be a utom atically reduced in
several steps in the heating or
cooling cycle as the interior
tem perature approaches the
preselected tem perature on the
tem perature wheel 1.