any body no how to get to the rear deck speakers of a B5 1999 A4 with Bose, and if the rattling back there is a speaker what the best replacement option is?

 

You might not have to replace it at all, take off the rear deck and check the speaker cone. Often times on the rear deck speaker the center cone falls off and it just has to be re-glued. One of my rear speakers sounded blown so i took it out, glued teh cone back on and it sounded good as new.

 

Of course it was Bose so it didn't sound great o start with.

 

Here's a DIY with instructions for accessing/removing the rear speakers:
http://www.audiworld.com/tech/elec58.shtml

 

thanks guys, and it does sound good. don't know what you are talking about