Comfort - SMART 453 Series Introduction Into Service Manual

Climate control
Automatic air conditioning
The automatic air conditioning system features an operating
unit with a display for the temperature selection. The usual
controls for the fan setting, air distribution, rear window
heater, A/C on/off etc. are arranged around this display in
the form of control buttons. Illuminated segments around the
edge of the operating unit indicate which functions and set-
tings are active.
On the automatic air conditioning, the functions of the ma-
nual air conditioning system are supplemented by additional
comfort-related features:
• Automatic regulation of manual temperature setting
• Three sensors in addition to interior temperature sensor
for climate control (sun sensor, air humidity sensors)
• Adjustment via push buttons and slider
N20s12
N20
N20s11
Climate control operating unit (N20) (automatic air conditioning)
N20s1 Rear window heater button
N20s2 "A/C" button
N20s3 Air recirculation mode button
N20s4 Defrost button
N20s5 Temperature control
N20s6 "OFF" button
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– This printout will not be recorded by the update service. Status: 06/2014 –
The A/C function is activated at the same time when the
AUTO button is pressed. A/C is considered part of the AUTO
function and switches itself on and off automatically depen-
ding on the climate conditions in the vehicle. When the A/C
button is pressed, the A/C compressor remains on or off for
the current ignition sequence. If the AUTO-LED only is still
on and A/C is pressed, the AUTO LED goes out even though
automatic control still takes place in the background.
If AUTO and A/C are active and the customer switches off
the A/C, all of the LEDs go out because the AUTO LED is
linked to the A/C. However, the air flow and air distribution
continue to be regulated automatically as before. Only the
A/C is switched off.
N20s4 N20s3
N20s2 N20s5 N20s6
N20s7
N20s8
N20s9
N20s10 Footwell air distribution button
N20s11 Reduce air flow button
N20s12 Increase air flow button
Introduction of the New smart fortwo coupé and smart forfour | Model Series 453
N20s1
N20s7
"AUTO" button
Windshield air distribution button
Instrument panel air distribution button
N20s8
N20s9
N20s10
P83.30-4975-00