Bmw e90 320d 2005.

Hey all,
As you can see I am new here.
Got some stuff I'd like to take car on my car, hope some1 can help me out.

So as stated above, I'm an owner of a BmW e90 320d 2005.
I have a problem with some squeaky noise coming from my back seat, srsly it is pissing me off, very iritating stuff. So just to make sure, the noise definatelly comes somewhere from the seat, or should I say beneath it or smthing... If two persons sit behind no noise, if there is no1 it is..... well annoying.
Dunno what to do, would apreciate any kind of help.

The second thing, some water came in from behind my rear light and ofc amp dead and gone.. could you please direct me to a site or smthing where I could order a used ampliffier or a replacement of some kind, since the new is really 2 expensive for my taste... and guys it is terrible 2 drive without music :O it is soooo depressing.... and i am musicless for quite some time

Thx in advance.

Ps: pardon me if I make some mistakes in writing, Eng is not my native language.

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