SMART forfour Operating Instructions Manual page 96

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Adjusting the recirculated air or
fresh air supply*
If your car is equipped with air condi
tioning*, you can change over between
recirculated air and fresh air when the
ignition is switched on.
Accident risk!
Use the recirculated air mode
only for brief periods. The windows
could otherwise fog over.
The oxygen content in the passenger
compartment will be depleted. This re
duces concentration and thus increases
the danger of fatigue.
Switching on recirculated air
Press the rotary control once.
> The air circulates e.g. when driv
ing through a tunnel in the passen
ger compartment.
> The indicator light on the switch
comes on.
Heater/ventilation
Switching on fresh air supply
Press the rotary control a further time.
> The air is drawn in from outside the
car.
> The indicator light on the switch
goes out.
Adjustments 4 9