Hyundai Azera: Steering wheel audio control

The steering wheel audio control button is installed to promote safe driving. Do not operate audio remote control buttons simultaneously.
VOLUME (VOL +/-) (1)
SEEK/PRESET (
/
) (2)
The SEEK/PRESET button has different functions base on the system mode.
For the following functions the button should be pressed for 0.8 seconds or more.
RADIO mode
It will function as the AUTO SEEK select button. It will SEEK until you release the button.
Single CD Player mode
It will function as the FF/REW button.
If the SEEK/PRESET button is pressed for less than 0.8 seconds, it will work as follows in each mode.
RADIO mode
It will function as the PRESET STATION select buttons.
Single CD Player mode
It will function as the TRACK UP/ DOWN button.
MODE (3)
Press the MODE button to select Radio, CD (Compact Disc), USB, AUX or Phone.
MUTE (4)
Detailed information for audio control buttons are described in the seperately supplied Navigation System manual.
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...
ESC Control Module Components and Components Location
Components
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...
Scheduled maintenance service
Follow Normal Maintenance Schedule if the vehicle is usually operated where none
of the following conditions apply. If any of the following conditions apply, follow
Maintenance Under Severe Usage Co ...