Thanks!
I RTFM a few mins back, I don't know about your head unit but mine can be configured apparently1
Steering Control Selects the input mode for the connected remote control. To prevent a malfunction, be sure to match the input mode with the connected remote control before use. Custom Input mode for the steering wheel remote control (Automatically selected when [user Defined] is complete.). Preset Input mode for the wired remote control excluding the steering wheel remote control. User Defined The steering button panel appears. î Press and hold the button you want to assign to the steering wheel. The button on the panel lights up (standby). î¡ Press and hold the button on the steering wheel you want to assign the function to. The button on the panel changes to blue (registration complete). î¢ To register other functions, repeat steps î and î¡. (Available only when [steering Control] is set to [Custom].) Notes î While making settings, only button operation on the unit is available. For safety, park your car before making this setting. î If an error occurs while registering, all the registered information is cleared. Restart registration from the beginning. î This function may not be available on some vehicles. For details on the compatibility of your vehicle, visit the support site on the back cover.