To lockTo lock  - Keyless entry system - Keyless operation system - Locking and unlocking - Mitsubishi Lancer Owner's Manual - Mitsubishi Lancer

Press the LOCK switch (1). All the doors and rear hatch will be locked. The turn-signal lamps will blink once.

► With a vehicle that has a Dead Lock System, pressing the LOCK switch (1) two Note

► With a vehicle that has a Dead Lock System, pressing the LOCK switch (1) two times in succession causes the Dead Lock System to be set. (Refer to “Setting the system”.)

    See also:

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    If the DPF warning display and check engine warning lamp illuminate at the same time during vehicle operation
    If an abnormal condition occurs in the DPF system, the DPF warning display and check engine warning lamp illuminate. Have the system inspected at a MITSUBISHI MOTORS Authorized Service Point. ...

    Door ajar warning display screen (when the ignition switch or the operation mode is ON)
    If any of the doors or the tailgate is not completely closed, this displays the open door or tailgate. If the vehicle speed exceeds approximately 8 km/h (5 mph) while a door is ajar, a buzzer s ...