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

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

See also:

Automatic air conditioning
The air conditioning can only be used while the engine is running. ...

Washer fluid
Check the washer fluid level in the container. If the level is low, replenish as required. NOTE The washer fluid container serves the windscreen, rear window, and headlamps (if so equipped). ...

If the keyless operation key is not operating properly
Insert the keyless operation key into the key slot in the glove box. Starting the engine and changing the operation mode should now be possible. Remove the keyless operation key from the key slot a ...