I was wondering if anyone out there could give some help/advice on installing new speakers on a 97 bmw 528, I want to replace the factory 5.25" speaker with some new Polk 2-ways. I started to try the removal of the rear deck speakers but couldn't figure out how to get them out. Next I went to the front door speakers and discovered that you have to remove the door panel to replace the speakers (I think). I stopped at that point, because I didn't want to screw something up. Has anyone replaced the speakers themselves that could help me figure this out. I would appreciate any help.