The vehicle's front and rear seats have adjustable head restraints. The head restraints provide comfort for passengers, but more importantly they are designed to help protect passengers from whiplash and other neck and spinal injuries during an accident, especially in a rear impact collision.
WARNING
To reduce the risk of serious injury or death in an accident, take the following precautions when adjusting your head restraints:

NOTICE
To prevent damage, NEVER hit or pull on the head restraints.

The vehicle's front and passenger's seats are equipped with adjustable head restraints for the passengers safety and comfort.

Adjusting the height up and down
To raise the head restraint:
1. Pull it up to the desired position (1).
To lower the head restraint:
1. Push and hold the release button (2) on the head restraint support.
2. Lower the head restraint to the desired position (3).
NOTICE

If you recline the seatback towards the front with the head restraint and seat cushion raised, the head restraint may come in contact with the sunvisor or other parts of the vehicle.

â– Type A

â– Type B
Removal/Reinstallation
To remove the head restraint:
1. Recline the seatback (2) rearward using the seatback angle lever/ switch (1).
2. Raise the head restraint as far as it can go.
3. Press the head restraint release button (3) while pulling the head restraint up (4).

â– Type A

â– Type B
To reinstall the head restraint:
1. Put the head restraint poles (2) into the holes while pressing the release button (1).
2. Adjust the head restraint to the appropriate height.
3. Recline the seatback (4) forward using the seatback angle lever/ switch (3).

The rear seats are equipped with head restraints in all the seating positions for the passenger's safety and comfort.

Adjusting the height up and down (if equipped)
To raise the head restraint:
1. Pull it up to the desired position (1).
To lower the head restraint:
1. Push and hold the release button (2) on the head restraint support.
2. Lower the head restraint to the desired position (3).

Removal/Reinstallation (if equipped)
To remove the head restraint:
1. Raise the head restraint as far as it can go.
2. Press the head restraint release button (1) while pulling the head restraint up (2).
To reinstall the head restraint:
1. Put the head restraint poles into the holes (3) while pressing the release button (1).
2. Adjust the head restraint to the appropriate height.
Hyundai Elantra AD (2016-2020) Service Manual: Fuel Filter Repair procedures
Removal
1.
Remove the fuel pump.
(Refer to Fuel Delivery System - "Fuel Pump")
2.
Disconnect the electric pump wiring connector (A) and the fuel sender connector (B).
3.
Remove the head assembly (A) after releasing the cushion fixing hooks.
4.
Disconnect the fuel tube quick-connect ...
Hyundai Elantra AD (2016-2020) Service Manual: CVVT Oil Control Valve (OCV) Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the OCV connector.
3.
Measure resistance between the OCV terminals 1 and 2.
4.
Check that the resistance is within the specification.
Specification : Refer to "Specification"
Removal
1.
Turn the ignition switch OF ...