Kia K900: Mode selection
The mode selection button controls the direction of the air flow through the ventilation system.
The air flow outlet port is converted as follows:

Face-Level (B, C, D, E, F, G)

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, F, G)

Air flow is directed towards the face and the floor.
Floor & Defrost (A, C, D, E, F, G)

Most of the air flow is directed to the floor and the windshield with a small amount directed to the side window defrosters.
Floor-Level (A, C, D, E, F, G)

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.

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

Instrument panel vents
The outlet vents can be opened or closed separately using the horizontal thumbwheel. To close the vent, rotate it left to the maximum position. To open the vent, rotate it right to the desired position.
Also, you can adjust the direction of air delivery from these vents using the vent control lever as shown.
Manual heating and air conditioning
Temperature controlDefroster
CAUTION
Conductors
To prevent damage to the conductors bonded to the inside surface of the rear
window, never use sharp instruments or window cleaners containing abrasives to clean
the window.
...
Transmitter precautions
The transmitter (or smart key) will not work if any of following occurs:
You exceed the operating distance limit (about 90 feet [30 m]).
The battery in the transmitter (or smart key) is weak.
...
Driving off-road
Drive carefully off-road because your vehicle may be damaged by rocks or roots
of trees. Become familiar with the off-road conditions where you are going to drive
before you begin driving. ...