I have replied to this so that you can access my How to thread on the subject. (it is in my signature field)
I successfully, and might I add, easily, fitted it to my 3.0 AWD. The suggestion is that it cannot be done to a diesel. However, the suggestion was also that it cannot be done to the AWD without some sort of inside knowledge regarding the ECU upgrade, it having been blocked by Jaguar.
I went ahead anyway, against the advice, and found that it was possible.
Get your head down to the pedal box on yours and look through my How to guide to see if there are any similarities in the wiring. I suspect they'll be different if yours has a throttle cable, but how different I don't know. You could do with having a look at another diesel that does have cruise, to see what wiring is on the pedal box.
I successfully, and might I add, easily, fitted it to my 3.0 AWD. The suggestion is that it cannot be done to a diesel. However, the suggestion was also that it cannot be done to the AWD without some sort of inside knowledge regarding the ECU upgrade, it having been blocked by Jaguar.
I went ahead anyway, against the advice, and found that it was possible.
Get your head down to the pedal box on yours and look through my How to guide to see if there are any similarities in the wiring. I suspect they'll be different if yours has a throttle cable, but how different I don't know. You could do with having a look at another diesel that does have cruise, to see what wiring is on the pedal box.