A Bunch Of Electrical Questions

[ScottD3]

First off, noises.
I understand there is a lot of motors and things that move on their own with in the 8, which is fine but for my own sanity I must know what each sound is, what it is doing and why.

First one is a fan in the boot. I think its the bose amps, it kicks in when I open the boot but I also hear it every now and then when working in the boot or in the cabin. I understand it's cooling something but does it need to go off like every 20 minutes?

The other one is from the rear passenger door, I think.
I get in, sit down and then hear this low drone. I don't think its the rear vents, it definitely sounds like its coming coming the back door.
Anyone hear this when they get in?

Second, seat and steering wheel keeps moving.
I don't normally drive to work but this week I have and on my daily drive I have to get the ferry. Its only a 20 minute trip and I've set up a memory position for the trip. For some reason whenever I open the car the seat and steering wheel keeps moving to that position. I have to press button 1 to get it back to my driving position.
How do I stop it doing this?
Is it anything to do with the button on the steering column?

Third, Drivers window started making funny noises. Do the 8s suffer from breaking window cables or anything similar?
If not I'm just going to spray some grease down the runners.