Radio question - CR220 swap for CDR220?

[Perfectlap]

you definitely want the aux-in if you plan to add MP3 hardrive device or Plug and Play Sattelite Radio Receiver.
Becker makes a jack$20 that will allow you play the music thru AUX mode and bypass transmiting MP3 and Satt. thru the FM channels. Much better sound in Aux mode.
If you are really condsidering Sattelite I would suggest getting an in-dash CD Alpine headunit with Sattelite capability built in. The ALpine unit has got to be cheaper than the CD220 and with Sattelite Capablitiy built in you don't have to worry about getting the dreaded alternator whine common with powering audio devices through the cigarette lighter .