Hi David
welcome to the club, I know my car is a lot older than yours, so don't know if that makes a difference or not, but very soon after I got mine, I asked a jaguar main dealer mechanic that very same question (I was going to get one from an s type that was being broken) he said basically don't try it, it's a massive job! Something to do with needing the wiring looms, running them from the boot all the way through the car , seats out, carpet up, dash apart, and so on. There are guys on here who do retro-fits for fun, so they may well laugh at the advice I received, I'm sure they'll respond soon
Regards
Steve