Setting the audio volume for external audio source
If an external audio source (e.g. an MP3 player or iPod®) is connected to the AUX input1 the audio source connected may have a volume different from the internal volume of the audio system (e.g. radio). Correct this by adjusting the volume of the input: In the normal view for the AUX source, press OK/MENU, select and then volume setting Standard or Boost.