In this video you will see how to remove the front door panel and remove the speaker in a 2008 audi a8 other known as a D3 model a8 face-lift.
You do not need the blue tool shown in video, that is merly a pry tool. if all else fails you can use a plastic knife or your typical butter knife but something tell me that if your looking at this video you can afford a plastic pry tool lol. any how if you do use a metal or potentially abrasive object to pry back panels try and buffer it by using a soft cloth or plastic bag over it.