To lock without using the keyTo lock without using the key  - Doors - Locking and unlocking - Mitsubishi Lancer Owner's Manual - Mitsubishi Lancer

Set the inside lock knob (1) to the locked position, and close the door (2).

Set the inside lock knob (1) to the locked position, and close the door (2).

► The driver’s door cannot be locked using the inside lock knob while the driver’s Note

► The driver’s door cannot be locked using the inside lock knob while the driver’s door is opened.

    See also:

    Door ajar warning display screen (when the ignition switch is “ON”)
    If any of the doors or the rear hatch is not completely closed, this displays the open door or rear hatch. If the vehicle speed exceeds approximately 8 km/h (5 mph) while a door is ajar, a buzz ...

    Adaptive Front lighting System (AFS)
    The AFS makes it easier for the driver to see ahead at night. While the lamp switch is in the or “AUTO” position (with the headlamps on), turning the steering wheel causes a bending lamp to a ...

    Licence plate lamps
    Remove the lens mounting screws, remove the lens, then remove the bulb by pulling out. ...