Hi Paul, Thanks for your response and pointing me in the right direction. I have already registered with service.citroen (have just had a Peugeot, and used servicebox) and printed off my vehicle specifics, but I was only looking at the parts relevant to my vin number and hadn't thought to look under general vehicle type. Looking at those diagrams, with an rpo of 10488, I can be fairly confident in looking for a 964727980. I wasn't aware of being able to load tracks into the NaviDrive, and don't know that I would want to do that particularly. The CD slot plays the Navteq map ok, it will play MP3 discs and my own home recorded discs, but only twice has it played a standard commercial CD. I don't understand that. I've run a cleaning disc in it, but that's made no difference. Hence the desire for a CD changer, plus I can keep the map disc in if I want to. And I've enabled the Aux input also, which works fine, I like to have options. I'll be looking at updating the Navteq map soon, any comments, recommendations? My previous searches through these forums led me to the estate opening rear window glass fix, duly done. Very useful to be able to resolve these little problems...so thanks to all those contributors. Thanks again, Paul. Appreciate it. Pat