Kia Optima: MAX A/C-Level (B, D, E)
To operate the MAX A/C, turn the temperature knob to extreme left. Air flow is directed toward the upper body and face. In this mode, the air conditioning and the recirculated air position will be selected automatically.

Instrument panel vents
The outlet vents can be opened or closed separately using the thumbwheel. Also, you can adjust the direction of air delivered from these vents using the vent control lever as shown.
Mode selection
Temperature controlUniform Tire Quality Grading
The following information relates to the tire grading system developed by the
National Highway Traffic Safety Administration (NHTSA) for grading tires by tread
wear, traction and temperature perfo ...
Inspection
1.
Turn ignition switch OFF.
2.
Disconnect the oil temperature
sensor connector.
3.
Measure resistance between sensor
signal terminal and sensor g ...
Recommended Lubricants
To help achieve proper engine and powertrain performance and durability, use
only lubricants of the proper quality. The correct lubricants also help promote
engine efficiency that results in impro ...