May sound like a dumb question but on my 2006 300C on the radio/nav the button set/rnd. What does rnd stand for. Still learning to operate the nav, must say but the manuals seem not so great. Read on the forum you can get the nav to talk where to turn, got to find that. Will re-read it again. Also that disclaimer each time it turns on is a pain.

 

It stands for random. You would use it when playing CD's.