I just recently heard one of the weirdest things to date.
I've been working on cars since I was 17 so, and this leaves me stumped.

So my wife comes to me and tells me that the car is making a weird noise. I asked if it was from the breaks while breaking, or from the engine, or squeeking from the suspension.. and she couldn't explain it and said none.. i said "none? are you sure?"

so I took the car around a few blocks and heard nothing...
THEN out of nowhere i heard this faint, yet very annoying, beep come from the dash.
no warning lights, no nothing. i accelerated and coasted again and eventually it did it again...
It's not loud or distinctive like a normal dash warning tone. its kind of sounds like you're at the doctor's office and he's checking your hearing in those headphones (not a loud and peircing sound but subtle, long, and annoying).

any ideas?