Car Radio or a vehicle audio is a piece of instrument that is attached to a car`s interiors for the purpose of in-car entertainment while on the move. In the earlier days it was only the AM radio which was later combined with the introduction of FM radios. And in the next stage of development it were the CD`s, then DVD players and now the latest is the bluetooth connectivity. While it was the AM and FM times, the audio systems played only those tunes that were aired by the local and nearest radio stations and the cars that were within the frequency received clear signals. AUTORADIO // DEUTSCHLAND But once the CD`s and other types started taking forms, it became the choice of the rider.