Mitsubishi Lancer Sportback Owner's Manual page 102

Instruments and controls
l If you press and hold the button for longer
than about 1 second when the position lamps
are illuminated, the brightness level changes
to the maximum level. Pressing and holding
the button for longer than about 1 second
again returns the brightness level to the previ-
ous level.
3
3-03
OG4E12E1