I have the six CD multi-changer in my 2008 Range Rover Sport and the CD's are neither playing nor ejecting (I simply get an error message). All other computer and communication functions are working fine (navigation, radio, auxiliary input, phone connection etc.). While this does not affect my ability to play music (i use an IPod) it prevents me from playing a DVD (used by the rear seat entertainment system) and (more critically) loading in a new navigation software CD. Despite having recently disconnected the battery i rather fear this is a mechanical problem as the fault was preceded by a period where the CD load / eject function would work intermittently (with accompanying mechanical noises). Any suggestions as to what this might be?