In that year, the option code RAZ radio didn't have an auxillary CD changer input. I went out on the lot and looked at a Dodge truck that has this same radio, and the odd symbol on the #1 preset is the Dolby noise reduction when you're playing a tape, and the #5 is the "RNDM" or shuffle play when you're playing a CD.
My '01 (actually it's an '03 Intrepid radio) has the same option code on its radio, but it has CD changer controls, satellite radio input, and RDS capability.
Chrysler's RDS system isn't that great though?It streams the messages rather than storing them in memory before displaying them, so I get wierd things once in a while, particularly when the reception isn't real strong. Like if I'm listening to 94.7 The Razor, it'll sometimes get stuck in midstream and display something like "4.7 RAR OR ZOR 9" I just laugh at it and ignore it.