I bought this for a Citroen C3 2003 which has the standard radio. As the CD drive was also broken on the radio I also bought a replacement radio at the same time. I tried the aux lead on both radios. It fitted but neither of them responded when I pressed the CD multi-changer button so I gave up. I checked continuity in the short loop that is supposed to trick the radio into behaving as if the CD multi-changed is fitted and it was fine.