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: General information
General Troubleshooting
Information
Before Troubleshooting
1.
Check applicable fuses in the appropriate fuse/relay box.
2.
Using the battery checker (MCR-570 KIT), check the battery for damage,
state of charge, and clean and t ...
Hyundai Creta GS 2014-2019 Service Manual: Repair procedures
General Inspection
After or before servicing the EPS system, perform the troubleshooting and test
procedure as follows. Compare the system condition with normal condition in
the table below and if abnormal symptom is detected, perform necessary remedy
and inspection.
...