Looks like the parts manual listed in post #3 is going to be a lot smaller than the download I have listed below. Being smaller in this case is a good thing since it has infomation specific to your XJR.
The file download has the following Jaguar models listed:
latest XJ, XF, XK then others by Vin number range XJ, X-Type, S-Type, XK8, XJS, earlier XJ models, XJ6 & XJ12 (XJ40), Series III Saloon, Daimler Limousine, and Jaguar Accessories.
If you still need to download this file then use this link to go to the download for Jaguar Electronic Parts Catalog file:
Once you open the thread: go down to post#1 for instructions on how to download the file and the download file location. After you start the download, the screen gives you the download file size of 264 megs. With highspeed internet download speed about 600 kb/sec it takes about 8 minutes. I did not understand why the download file size is so large. It looks like this software takes only about 5 megs of diskspace after you install it.