leviohanenye

hello all. over the past few months I've been experiencing a crazy issue. my antenna randomly goes up and down while driving. when it goes down, it mutes the whole speaker system so I cannot hear anything from the radio or the cassette. it stays off for about three days then may randomly come on one day and shut back off. does any one have any idea of what's happening? this is on a 94 c280 stock radio but I know a lot of our cars have the same radio systems. any help is useful! thanks