Radio/cd problems
 

I have a 1991 300E with the 10 disc Sony Cd changer. The CD player hasnt been working and when i play it, there is no music from the CD, only sounds from the radio station that i have to tune it to to play the cd. also, when i press the mode button on the radio, a message shows up - "CC E". Does anyone know what the probem is? Any help would be appreciated.