Mercedes-Benz viano 639 series Introduction Into Service Manual page 18

Automatic air conditioning function
The blower speed can be adjusted to five different
settings using the two blower buttons. When set to
zero, the bar indicator and target temperature display
extinguish and a zero appears. The unit is then off.
The target temperature can be specified using two
buttons. The outlet air temperature is then regulated
automatically.
Air is conducted to various parts of the vehicle
depending on the operating mode. In heating mode,
air is guided to the floor, while in cooling mode air is
directed towards the ceiling.
To activate the Auto function, the "reduce blower
speed" button needs to be pressed and held (for more
than 1.2 s). While the button is pressed, the four
letters "AUTO" in the display will flash. Briefly pressing
one of the blower buttons will deactivate the Auto
function.
Heating function
The blower speed can be adjusted to five different
settings using the two blower buttons.
The outlet air temperature is not regulated. The
temperature in the rear is raised or lowered by control-
ling the temperature flap. Two buttons in the upper
control panel control the temperature flap.
For rear heating, air is only blown into the footwell
area.
– This printout will not be recorded by the update service. Status: 07 / 2010 –
Automatic air conditioning controls
1 Lower target temperature
2 Raise target temperature
3 Raise blower speed
4 Lower blower speed/Auto function
5 Blower speed indicator
6 Target temperature indicator
Heating controls
1 Lower temperature
2 Raise temperature
3 Raise blower speed
4 Lower blower speed
5 Blower speed indicator
6 Temperature indicator
Introduction of the New Vito/Viano, Model Series 639
Interior
l 17