Heater/Air conditioningHeater/Air conditioning  - For pleasant driving - Mitsubishi ASX Owner's Manual - Mitsubishi ASX

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

See also:

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To operate
To operate the system, move the gearshift lever or selector lever to the “R” position while the ignition switch or the operation mode is in ON. To stop the operation, push the “SONAR” swit ...