I'm looking for a way to connect my head unit (blaupunt rdc500) to sd. I know about a interface Car2pc. but i think this will only play music in playlists. I don't think that e.g. sd would be able to interrupt to normal radio or cd-player to announce messages from the navigation.
Is there a way to make this happen??? So connect sd to a head unit in a way that sd can interupt for messages and play music controlled from sd?