I've had this set up for a while now with no problems, but recently noticed something that bothers me. When I listen to the radio (AM or FM), something I rarely do and press track up, my preset stations do not change. Instead, the radio station just moves to the next station. For example, preset 1 is 95.5 and preset 2 is 100.3. If I'm listening to preset 1 (95.5) and press track up, the Z3 does not switch to preset 2 (100.3), instead it goes to 95.7. If I hit it again it goes to 95.9 and so forth. Is my PAC-SWI-PS configured wrong? Also, my track up and track down buttons work fine, but my volume +/- button seems to stick (still talking about my steering wheel buttons configured for my PAC-SWI). Sometimes when I press vol +/- the volume increases/decreases immediately and I can see the volume increase on the Z3 screen. Other times absolutely nothing happens when I press the button and I do not see the volume increasing or decreasing on the screen. What do you guys think may cause this?

you can program those buttons for preset up and down, or just hold the button for a sec and the next station that comes in will come on....for the volume thing sounds like you need it to either be reprogrammed or if resistors were needed might need a closer tolerance.

Thanks, one more question. Can the PAC-SWI-PS be programmed to actually change the A/V source? Instead of having to press IPod or Library on the screen, can I just press a programmed button on my steering wheel? Where can I find the info on how to do the button assignments? Is it in the PAC-SWI-PS booklet?

I just installed this in my lade and I programmed the Prog button to change av source since its just one button. I then use the source button to run through presets since its an up/down. Volume and seek or track up/down was programmed as usual.

Basically you can program the buttons to your preference, I would reprogram the unit. I think maybe your avaitor buttons a little different than mine but should not matter as you can programed the pac to whatever button you want.