
The mode selection knob controls the direction of the air flow through the ventilation system.
Air can be directed to the floor, dashboard outlets, or windshield. Five symbols are used to represent Face, Bi-Level, Floor, Floor-Defrost and Defrost air position.
Face-Level (B, D)

Air flow is directed toward the upper body and face. Additionally, each outlet can be controlled to direct the air discharged from the outlet.
Bi-Level (B, D, C, E)

Air flow is directed towards the face and the floor.
Floor-Level (A, C, D, E)

Most of the air flow is directed to the floor, with a small amount of the air being directed to the windshield, side window defrosters, and side vents.
Floor & Defrost (A, C, D, E)

Most of the air flow is directed to the floor and the windshield with a small amount directed to the side window defrosters, and side vents.
Defrost-Level (A, D)

Most of the air flow is directed to the windshield with a small amount of air directed to the side vents.
Heating and Air Conditioning
MAX A/C-Level (B, D)Hyundai Elantra AD (2016-2020) Service Manual: Seat Belt Buckle Switch (BS) Repair procedures
Removal
1.
Disconnect the battery negative cable, and wait for at least three minutes before beginning work.
2.
Remove the front seat assembly.
(Refer to Body - "Front Seat Assembly")
3.
Remove the seat belt buckle switch (A) after loosening the seat belt buckle mounting bolt.
Installa ...
Hyundai Elantra AD (2016-2020) Service Manual: Rear Seat Assembly Components and Components Location
Component Location
1. Rear seat cushion assembly2. Rear seat back assembly
...