I have a 2008 Fit Sport. I've noticed on the 5th and 6th preset buttons it says "disc +" and "disc -" respectively. What do these do? I've pressed them in various modes and they don't really seem to do anything. Is this same head unit used in another car equipped with a disc changer? Was a disc changer ever an option for the Fit or Jazz?

Edit: Oops, typo in the title. That should read stereo question.

 

yeh, i think you need the CD changer option to use those features.

but with MP3 playabilty and also MP3 aux jack, do you need a CD changer?