MG MG6 Owner's Handbook Manual page 135

STARTING AND DRIVING
When the alarm system is disarmed, Press the interior
locking switch (1) to lock, and press the interior unlocking
switch (2) to unlock.
Note: The interior locking/unlocking switch will not
work if the alarm system is armed, in this case the
alarm will sound.
Note: In an emergency, press and hold the interior
locking switch for more than two seconds, the alarm
will sound and all the doors will lock. Press and hold
unlocking switch to silence the alarm. The doors will
unlock when the switch is released.
Interior Door Handles
Use the door handles to open the door:
1 First operation of the door handle unlocks the door.
2 Second operation of the door handle opens the door.
Speed Related Locking
This feature locks all the doors automatically when the
road speed exceeds 3 MPH (5 km/h). This feature is
selectable, see 'Instruments and Controls', 'Security'.
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All doors are automatically unlocked when the handset is
removed from the docking station