I used cables from Discount Car Stereo (
www.discountcarstereo.com). They have a numer of options to interface to your CR220 or CDR220 (search under Becker or Blaupunkt). They also show how to activate the AUX function in the head unit. I chose not to use the charging cable option and used the aux imput jack. I now have a very sanitary install with a aux imput jack mounted in a discrete location. Add a 3 foot coil 3.5mm cable from Best Buy and no cable laying all over.
flyfisch