Fiat TIPO 5DOOR Owner's Handbook Manual page 278

CONTROLS BEHIND THE STEERING WHEEL
Buttons
Button 1 (steering wheel left side)
Upper button
Central button
Lower button
Button 2 (steering wheel right side)
Upper button
Central button
Lower button
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Interaction
Brief button press : search for next radio station or selection of USB next track
Long button press : scan of higher frequencies until released/fast forward of USB
track
With each press it scrolls through sources AM, FM, DAB, USB, AUX (where provided).
Only the available sources will be selected.
Brief button press : search for next radio station or select USB next track.
Long button press : scan of lower frequencies until released/fast forward of USB
track.
Increasing volume
Brief button press : single volume increase
Long button press : fast volume increase
Activation/deactivation of Mute / Pause function
Decreasing volume
Brief button press : single volume decrease
Long button press : fast volume decrease