What is the aux button for on the deluxe 6 cd mp3 player system in the
2005 Focus ZX4 SES? I can't find any audio input lines on the stereo,
but it doesn't make sense to me that a manufacturer would put a button
on the radio that serves no purpose. Hopefully someone more familiar
with the Focus audio options can resolve this issue. I searched this
group for any discussions on this, and only found one thread from last
year that appears to leave the issue unresolved.