Hi Joe. Thank you for your reply. I have since contacted Jaguar technicians and they told me what to do ie: press this and that then put in my own code, which didn`t work either. They then said to get a diagnostic done, which I did but still no joy and when I told them this. They said get the memory wiped with another diagnostic test and then put in my own System Code number. And my Sat Nav, Radio, Clock etc will start working again. Hopefully this will work.
Cheers Joey