WARNING
Never adjust the instrument cluster while driving. This could result in loss of control and lead to an accident that may cause death, serious injury, or property damage.

The brightness of the instrument panel illumination changes by pressing the upper or lower part of the switch when the ignition switch is in the ON position and when the parking lights are turned on.

If the brightness reaches to the maximum or minimum level, a chime will sound (if equipped).
Instrument cluster
GaugesHyundai Creta GS 2014-2019 Service Manual: Accelerator Pedal: Repair procedures
Removal
1.
Turn the ignition switch OFF and disconnect the negative (-) battery
terminal.
2.
Disconnect the accelerator position sensor connector (A).
3.
Remove the mounting nuts (B).
...
Hyundai Creta GS 2014-2019 Service Manual: Special service tools
Special Service Tools
Tool(Number and Name)
Illustration
Use
09581- 2T100
Piston expander
Spreading the front disc brake piston.
...