I want to put aftermarket speakers in my standard audio system A4 in the rear doors. The bose system has a grill and speakers back there. I checked with the dealer and I can get the grills, I just need to know how those speakers are mounted in there so I can do the same with my MBquarts. Thanks!<br>PS_please respond with email as I don't read this everyday<br>randrews@post.smu.edu<br>Rob<br>