While driving home the other day in my 1994 C280 my radio suddenly quit playiing music and a very loud high pitched siren type noise started to come from all speakers. The noise is so loud I have to turn the radio off. I have done no modifications to the radio, which did come with a dealer installed cd changer. If anyone had any similar problems and know what I should do I would appreciate your input. I have a 5 hour drive home for the holidays and will be forced to ride in silence

Thanks!