Fiat PANDA 2016 Owner's Handbook Manual page 194

Button
+/-
SRC/OK
The functions of the steering wheel controls are activated when the button is released.
192
Activation of voice recognition
Interruption of the voice message in order to give a new voice command
Adjust the audio volume of all functions: hands-free, text message reader, multimedia supports, voice
messages, Radio, USB, depending on the active source.
Scroll through Menu items on the panel
Select multimedia support tracks
Scroll through SMS messages in the list
Access to the radio menu displayed on the instrument panel
Confirm manually selected menu option
Select sources: FM, AM, DAB (where present),
Select the SMS message on the instrument panel
Functions
Bluetooth
® AUDIO, USB and AUX