I just replaced my front speakers in my '98 A6 2.8 with 6.5" components. From what I can tell, the speaker cover is part of the door panel. It's easy to take the door panel off. There are just 2 screws at the top holding it on. 1 on the side near the outside mirror and one on the opposite end where the door opens. After you get them off, grab the inside door handle and start to pull it up towards the sky. It will just slide off the window track that it sits on.