The sat nav will only work with with the nav cd, if you want to play a music cd whilst using the sat nav you need an autochanger. Are you sure there isnt one in the boot, its would be located behind one of the side panels.
Yep, you can only play CD's in this configuration if you remove the Nav Disc first - thereby making the nav system redundant unless you have the newer RNS 510 units with a 30gb hard drive to store both the nav maps and your music.
I thought the autochanger was a standard fit with the rns2 Satnav unit, it doesn't make sense to sell a car without any ICE , the fact the rns2 will play audio discs is a by product from the functions the unit was designed to do.
Cass mentioned iPod , some iPod kits plug in to the autochanger connection I wounder if the autochanger has been removed at some point in favour of an iPod kit ?
I thought the manual said you can plan the route, then remove the CD and play a music CD and it will still navigate. It will require the nav cd again though if it needs to re-route.
I'll have to have a dig through the manual again later.