MG MG3 Owner's Handbook Manual page 55

INSTRUMENTS AND CONTROLS
Mirror Glass Manual Adjustment
Use the joystick to adjust the mirror glass to achieve the
required view.
38
*
Heating Elements
elements which disperse ice or mist from the glass. The
heating elements operate while the Heated Rear Window
is switched on.
Note: The heating elements will only work when the
engine is running.
*
The door mirrors have integral heating