MG MG3 Owner's Handbook Manual page 60

INSTRUMENTS AND CONTROLS
Note: It is recommended that you ISOLATE the rear 1
window switches when carrying a child.
*
'One-Touch' Down
By briefly pressing and then releasing (within half a
second) a window switch, the window can be fully opened.
Window movement can be stopped at any time by pressing
the switch again.
Note: DO NOT operate the switch for more than 20
seconds so as to protect the motor from overheating,
the switch will not operate. If this occurs, please wait
until the motor cools down.
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