I recently purchased a 2007 Mustang GT. The dealship recently installed Sirius in it. They didn't do a very good job and left scratches in the unit and didn't plug back in the heat/AC. That is being dealt with. The question I have is that I thought I saw a setting on the unit that said "MAX BASS" and it could be ON or OFF. Maybe it was just my imagination and I could be wrong about it. I know it's just a stock radio but I want to make sure everything is working how it was.

 

When you adjust the bass, it has a little slider that goes to the right as you increase the bass setting. When you get all the way to the right, it simply says "Max Bass", i.e. "max bass" = "bass turned up all the way"