A tip from reader Guy Kuo, which I have added to the article "iPod Car Audio Direct Connect": with some Becker models, you may be able to completely disconnect the CD changer's DIN connector and make the head unit treat the iPod as an auxiliary input. In my experience, this does not work for models that do not have an aux in, such as the CR-210, because when you disconnect the DIN connector, the head unit sees that you have no CD changer, and does not allow you to select it.