Front seat warmers (if equipped)
Seat warmers are provided to warm the seats during cold weather.
WARNING
The seat warmers can cause a SERIOUS BURN, even at low temperatures and especially if used for long periods of time. Passengers must be able to feel if the seat is becoming too warm so they can turn it off, if needed.
People who cannot detect temperature change or pain to the skin should use extreme caution, especially the following types of passengers:
WARNING
NEVER place anything on the seat that insulates against heat when the seat warmer is in operation, such as a blanket or seat cushion. This may cause the seat warmer to overheat, causing a burn or damage to the seat.
NOTICE
To prevent damage to the seat warmers and seats:

While the engine is running, push either of the switches to warm the driver's seat or front passenger's seat.
During mild weather or under conditions where the operation of the seat warmer is not needed, keep the switches in the OFF position.
• Manual temperature control
Each time you push the switch, the temperature setting of the seat is changed as follows :

• Automatic temperature control The seat warmer starts to automatically control the seat temperature in order to prevent low-temperature burns after being manually turned ON.

If HIGH temperature is manually selected again, the temperature will be controlled automatically.
• When pressing the switch for more than 1.5 seconds with the seat warmer operating, the seat warmer will turn OFF.
• The seat warmer defaults to the OFF position whenever the ignition switch is in the ON position.
Information
With the seat warmer switch in the ON position, the heating system in the seat turns off or on automatically depending on the seat temperature.

While the engine is running, push either of the switches to warm the rear seat.
During mild weather or under conditions where the operation of the seat warmer is not needed, keep the switches in the OFF position.
Each time you push the switch, the temperature setting of the seat is changed as follows :

The seat warmer defaults to the OFF position whenever the ignition switch is placed in the ON position.
Information
With the seat warmer switch in the ON position, the heating system in the seat turns off or on automatically depending on the seat temperature.
Hyundai Elantra AD (2016-2020) Service Manual: Multimedia Jack Description and Operation
Description
The multimedia jack on the console upper cover is for
customers who like to listen to external portable music players like the
MP3 etc., through the vehicle's sound system when it is linked to this
jack. The customer has this added option.
In case of distortions from media conn ...
Hyundai Elantra AD (2016-2020) Service Manual: Adaptive Front Lighting System Repair procedures
Removal
AFLS Unit
1.
Disconnect the negative (-) battery terminal.
2.
Remove the glove box housing.
(Refer to Body - "Glove Box Housing")
3.
Remove the AFLS unit (A) after removing connector and nuts (2EA).
Installation
AFLS Unit
1.
Install the AFLS unit after connecting the conn ...