The mode selection button controls the direction of the air flow through the ventilation system.
The air flow outlet direction is cycled as follows:
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, C, D, 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 and side window defrosters.
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.
Defrost-Level (A, D)
Most of the air flow is directed to the windshield with a small amount of air directed to the side window defrosters.
Hyundai Elantra AD (2016-2020) Service Manual: Door Step Trim Components and Components Location
Component
1. Front door step trim 2. Rear door step trim
...
Hyundai Elantra AD (2016-2020) Owners Manual: Good Braking Practices
WARNING
Whenever leaving the vehicle or parking, always come to a complete stop and
continue to depress the brake pedal. Move the shift lever into the 1st gear (for
manual transmission vehicle) or P (Park, for Intelligent Variable Transmission (IVT)/
dual clutch transmission vehicle) position ...