I don't need a mute button to hear my DW yell over the sound system. I do have a light on the street side of my rig above where the utilities hook up between the slides. I haven't figured out yet if that switch is for that light as it hasn't come on. I haven't climbed up yet to see if there is even a bulb in it.
2015 Jayco Eagle 314 BHDS
2016 Ford F-350 Super Duty CC PSD SRW 4x4