Another battery drain thread...any input would be great!

[syncrocrick]

So for the last couple years my X5 has had a very slow drain - like 3 or 4 weeks before the battery goes down.

Yesterday the battery drained in about a day.

I jump started the car and drove it around to recharge it. After I stopped the car and made sure everything in it was off (radio, fan, etc), I could still hear some noise coming out of what appears the front left speaker (or nearby). It was a humming sound, but I felt like I could also hear some radio beats in the background.

I have also been having issues with the radio (with navigation) working just whenever it feels like it (turning on/off).

So I went in the back and pulled Fuse 72/73/74/75. The sound went away.

It was the first time that I actually noticed this phenomenon.

Is there a ghost in my car? Any input on what could be happening here?

This is pretty much the only issue I have with this car, which is pretty impressive at 189000 miles.
I would really love to track down this drain and I am hoping this could be the very first breakthrough.

Christian
2003 X5 4.4.