Make this adjustment before you start driving and while the day/night lever is in the day position.
Pull the day/night lever toward you to reduce glare from the headlights of the vehicles behind you during night driving.
Remember that you lose some rearview clarity in the night position.
Hyundai Sonata LF 2014-2019 Service Manual: AVN Remote Controller Components and Components Location
Components
1. Left Remote Control Switch (Audio + Hands free)2. Right Remote Control Switch(Cruise+Trip Computer)
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Hyundai Sonata LF 2014-2019 Service Manual: Engine Room Under Cover Repair procedures
Removal and Installation
1.
Loosen the mounting clip and bolt and then remove the under cover (A).
Tightening torque:
7.8 ~ 11.7N.m (0.8 ~1.2kgf.m, 5.7 ~ 8.6 lb-ft)
2.
Install in the reverse order of removal. ...