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: Heater Unit Components and Components Location
Component Location
1. Heater unit assembly
Compoents
1. Shower duct [LH]2. Heater core cover3. Heater core & Seal assembly4. Mode actuator5. Temperature control actuator [LH]6. PTC Heater7. Heater unit pad8. Air guide [LH]9. Heater case [LH]10. Evaporator core assembly11. Heater core ...
Hyundai Elantra AD (2016-2020) Service Manual: Rear Oil Seal Repair procedures
Removal
1.
Remove the automatic transaxle.
(Refer to Automatic Transaxle System - "Automatic Transaxle")
2.
Remove the drive plate.
(Refer to Cylinder Block – “Drive Plate”)
3.
Remove the rear oil seal (A).
Installation
1.
Install a new rear oil seal.
(1)
Apply engine oil ...