Relax and enjoy mate! You got yourself the measuring stick by which all jaguars are compared to. Great car, from top to bottom. Few problems and no recalls.

 

Unless you've got a lemon (that's pretty weak chance ) it should serve you more than 200K miles

 

Some of the older models like my late 90's XJ40 are like the energizer bunny, they keep on going and going and going and... well you get the idea. With regular care and maintenence their'srealy no reason why modern cars can not go almost indefinitely. This is why manufacturers stop producing parts and keep changing models. My XJ has well over 200,000 kms, and shows on signs of stopping. I've heard it's not uncommon for the XJ40's 4.0 six to go well over 300,000 kms with no issues. Keep the cat and drive, drive, drive.