I purchased a used car with a Z1 installed. The car has steering wheel controls. Everything worked flawlessly at first but now:
1. Sometimes when a song ends, instead of going to the next song, it goes to the next CD.
2. Sometimes when I raise the volume using the steering wheel button, it goes on to the next song.
3. Sometimes when I press the button on the wheel to advance to the next track, the radio goes to AM or FM
4. Sometimes when I press the "lower volume" on the steering wheel, it actually raises the volume
The buttons on the unit seem to work ok so it leads me to believe