Folding the rear seat
The rear seatbacks can be folded to facilitate carrying long items or to increase the luggage capacity of the vehicle.
WARNING

To fold down the rear seatback:
1. Set the front seatback to the upright position and if necessary, slide the front seat forward.
2. Lower the rear head restraints to the lowest position by pushing and holding the release button (1) and pushing down on the head restraint (2).

3. Pull on the seatback folding lever (1) located in the trunk.

4. Fold the seatback toward the front of the vehicle.
5. To use the rear seat, lift and unfold the seatback to the upright position. Push the seatback firmly until it clicks into place. Make sure the seatback is locked in place.
When you return the seatback to its upright position, always be sure it has locked into position by pushing on the top of the seatback.
WARNING
When returning the rear seatback from a folded to an upright position, hold the seatback and return it slowly. Ensure that the seatback is completely locked into its upright position by pushing on the top of the seatback. In an accident or sudden stop, the unlocked seatback could allow cargo to move forward with great force and enter the passenger compartment, which could result in serious injury or death.
WARNING
Do not place objects in the rear seats, since they cannot be properly secured and may hit vehicle occupants in a collision causing serious injury or death.
WARNING
Make sure the engine is off, the shift lever is in P (Park), and the parking brake is securely applied whenever loading or unloading cargo. Failure to take these steps may allow the vehicle to move if the shift lever is inadvertently moved to another position.

The armrest is located in the center of the rear seat. Pull the armrest down by using the strap from the seatback to use it.
If your car is not equipped with a rear armrest, the rear cup holders are located at the back of the center console.
CAUTION
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Hyundai Elantra AD (2016-2020) Owners Manual: Manual adjustment
The front seat can be adjusted by using the levers located on the outside of
the seat cushion. Before driving, adjust the seat to the proper position so that
you can easily control the steering wheel, foot pedals and controls on the instrument
panel.
Forward and rearward adjustment
To move ...