Adjusting instrument cluster illumination

When the vehicle's parking lights or headlights are on, press the illumination control button to adjust the brightness of the instrument panel illumination.
When pressing the illumination control button, the interior switch illumination intensity is also adjusted.
WARNING
Never adjust the instrument cluster while driving. Doing so could lead to driver distraction which may cause an accident and lead to vehicle damage, serious injury, or death.

Instrument Cluster
GaugesHyundai Elantra AD (2016-2020) Service Manual: Components and Components Location
Components
1. Body control module(BCM)2. TPMS sensor (FL)3. TPMS sensor (RL)4. TPMS sensor (FR)5. TPMS sensor (RR)
...
Hyundai Elantra AD (2016-2020) Service Manual: Crankshaft Repair procedures
Disassembly
•
Use fender covers to avoid damaging painted surfaces.
•
To avoid damaging the cylinder head, wait until the engine
coolant temperature drops below normal temperature (20°C [68°F]) before
removing it.
•
When handling a metal gasket, ...