HeaterHeater  - For pleasant driving - Mitsubishi Lancer Owner's Manual - Mitsubishi Lancer

The heater can only be used while the engine is running.

See also:

Parking with the engine running
Never leave the engine running while you take a short sleep/rest, or you open or close a gate or garage door, etc. Also, never leave the engine running in a closed or poorly ventilated place. Wa ...

Ventilation slots
The ventilation slots in front of the windscreen should be brushed clear after a heavy snowfall so that the operation of the heating and ventilation systems will not be impaired. ...

Window glass
The window glass can normally be cleaned using only a sponge and water. Glass cleaner can be used to remove oil, grease, dead insects, etc. After washing the glass, wipe dry with a clean, dry, soft ...