[Richard]

I think this applies to a few years. There are several reasons you may need to remove the speaker panels located above the driver and passenger. Mine were rattling when driving so they needed some felt in the touch points. You may have to replace or repair a speaker, or if your speakers start to buzz and crackle the relays that switch between the house stereo and the dash stereo are located behind there on some coaches. 

These panels are not intuitive to remove.

There are two screws underneath hidden by the curtains. Remove both.     
Then remove the door that swings upward. Otherwise you won’t have enough swing to get the panel out. 
Then pull outward about 3/4 inch on the bottom of the panel. Then push/pull/tap the panel downward. Yeah, I know, the instinct is to push up. 

Here is the backside of the panel, and the mounting cleat. So you can see why you have to pull down. 
       
And a pic of the relays and speaker crossovers behind the panel. I do not know what the relay on the far right does. It switches 120VAC. And mine hums, so a new relay is on the way.