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

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