Mk1 Radio - Which Cd Changer Bus?

[Guest Dan Slatford]

I've had a look around for information but only ended up getting rather confused.

 

My 2001 C5's radio has a CD changer button. I think these units are Clarion (or Clarion-compatible?) so I was expecting the older C-BUS connector. I have a CeNET changer but wasn't really expecting to plug that in :rolleyes:

 

However I'm not even too sure where the changer socket is. There is no C-BUS socket. There appears to be a blue plug above the ISO connector, between the (presumably) remote control and LCD display connectors, with no wires in it. Is this a CAN-NET connector, or is that bus only in the MKII models?

 

If this blue empty plug is the changer bus, does anyone know what type bus it is? Ultimately I'd like to make some use of it. This is the first car I've owned whose stock radio I rather like - the CD player works, the radio seems excellent, it integrates with the remotes and traffic master, and has a nifty remote display! But I would like to add something more useful - just a changer would help, or anything that presents an auxiliary / mp3 input would be smashing too... do I have any options open to me?