MG MG4 Owner's Handbook Manual page 246

STARTING & DRIVING
Mislock
If the driver's door is not fully closed when the smart
key lock button is pressed, the vehicle horn will sound
once,indicating a mislock. In this case, none of the doors
will lock, the alarm system will not be armed.
If the driver's door is closed, the passenger door, bonnet
or tailgate are not fully closed, the horn sounds once
toindicate mislock when the car undergoes locking
operation.However, the 'partial arming' attributes of the
security system will enable as much of the system to
be armed aspossible (all fully closed doors, bonnet or
tailgate apertures will be protected, but an open door will
not!). The alarm indicator will flash. As soon as the open
aperture is closed,the system will automatically revert to
an armed state.
Anti-theft Alarm Sound
If the anti-theft alarm has been triggered, the vehicle horn
will sound continuously. Press the UNLOCK button on
the remote key, the anti-theft alarm will be deactivated.
246
Interior Lock and Unlock Switch
1 Unlock Switch
2 Lock Switch
When the body anti-theft system is not set, press the
interior lock switch ( 2 as shown) after closing all doors
to lock all doors; press the unlock switch ( 1 as shown) to
unlock all doors.