no cdc

Hello all, After an infuriating two months of searching online to try and make some sense of how to add Bluetooth or AUX to my w211, I have finally given up and decided to ask for help to look for solutions. For some context, I own an 04 w211 classic trim with the base AUDIO 20 (MF2310)...

I have being trying to correct a problem with the CD changer where the cartridge got stuck. Having read various threads I removed the unit and the cover and carefully moved a stuck CD and tray to release the cassette. I believed that copy CD's used by the previous owner had caused the problem...