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: Specifications
Specifications
Fuel Delivery System
ItemsSpecificationFuel TankCapacity50 lit. (13.2 U.S.gal., 52.8 U.S.qt., 44.0 Imp.qt.)Fuel FilterTypePaper typeFuel Pressure RegulatorRegulated Fuel Pressure355 ~ 365 kPa (3.4 ~ 3.7 kgf/cm?, 48.6 ~ 52.9 psi)Fuel PumpTypeElectrical, in-tank typeDriven byEle ...
Hyundai Elantra AD (2016-2020) Owners Manual: Limitations of the System
The Forward Collision Avoidance Assist (FCA) system is designed to monitor the
vehicle ahead or a pedestrian on the roadway through radar signals and camera recognition
to warn the driver that a collision is imminent, and if necessary, apply emergency
braking.
In certain situations, the radar ...