Sonata 2011 Owners Manual

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To resume cruising speed at more than approximately 25 mph (40 km/h)
If any method other than the CRUISE ONOFF switch was used to cancel cruising speed and the system is still activated, the most recent set speed will automatically resume when the RES/+ switch is ...

Warning on the LCD screen (if equipped)
Key is not in vehicle If the smart key is not in the vehicle and if any door is opened or closed with the engine start/stop button in ACC, ON, or START, the warning illuminates on the LCD scree ...

Air intake control
  This is used to select outside (fresh) air position or recirculated air position. To change the air intake control position, push the control button. Recirculated air position   ...