Post by thread:[EE] Car Radio/Head Unit <-> Cd Changer Protocol?

I have a Radio/Head Unit Peugeot 4050 in my car. According to Peugeot, this is manufactured by Clarion. According to Clarion, this unit, which also has the type number PU-9679A printed on, is able to control a Clarion CD-Changer using C-Bus. Clarion people tell me that i can only connect a Clarion CD-Changer, and there is no way to use this as an AUX-Input, as i cannot switch to CD-In, as long as no CD-Changer is connected. Does anyone know the C-Bus protocol, as i would like to emulate a CD-Changer to be able to use this connector as an AUX-Input. Thanx! tino