Hey mate.
I was working on prototype of cdc3 emulator for cdr600 / ccrt700.
However, as i don't have a working cdc3 unit, I can't clone the communication of it. So the project is stuck at the moment
Its seems to be impossible to find cdc3. Keep in mind, that ncdr ccd3 version doesn't work with cdr600. Yet I could make one for ncdr type head units, however its time consuming and for that i wound need to have working ncdr and cdc3.
My original idea included cdc3 emulator, with various types of dynamic multimedia connection, such as bluetooth with a2dp, meaning control your smart phone media player directly from steering wheel controls. Hacked display as well to print custom messages
How exactly your cdc3 died?