Each time you press this button, there is a sound and the brightness of the instruments changes.

1- Brightness display
2- Rheostat illumination button
Note
► You can adjust to 8 different levels for when the tail lamps are illuminated
and 8 for when they are not.
► If the vehicle is equipped with the automatic lamp control, when the lamp switch
is in a position other than the “OFF” position, the meter illumination switches
automatically to the adjusted brightness, depending on the brightness outside the
vehicle.
► The brightness level of the instruments is stored when the ignition switch is
turned off.
► 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 previous level.
Except for vehicles equipped with Twin Clutch SST
Instruments and controls
Brake fluid/Clutch fluid
Driving and alcohol