Hyundai 2003 Sonata Owner's Manual page 80

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FEATURES OF YOUR HYUNDAI
Face-Level
Selecting the "Face" mode will cause air to be
discharged through the face level vents.
Bi-Level
Air is discharged through the face vents and the
floor vents. This makes it possible to have
cooler air from the dashboard vents and warmer
air from the floor outlets at the same time.
HEF-043
Floor-Level
Air is discharged through the floor vents.
HEF-044
Floor-Defrost Level
Air is discharged through the windshield defrost
vents and the floor vents.
If the "Floor-Defrost" mode is selected, the air
HEF-045
intake control will change to "Fresh" mode.
HEF-046