AUX Input on 2003 X5

[dmoney98]

Hello,

I recently had the AUX Input jack installed in my 2003 X5 (Nav, DSP, CDchanger in rear, bluetooth, NAVTV). When I push the MODE button to "AUX", and connect a device (device at full volumn), the volumn from the head unit is softer than at "Radio" or "CD" or "TV". Is there a volumn adjustment I need to make for AUX to be comparable to radio, cd,.. ?

Thanks in advance,
dmoney98