Thanks for taking the time to share your thoughts. I've heard the engine is pretty robust, and indeed the car has been serviced generally in line with the 10,000 miles recommend, just not to JLR's schedule. It is a particularly nice late example, with low mileage and one owner. The dealer so far is accommodating, and at my request is trying to see if the previous owner would be willing to give me a call.
I have driven it, but need a longer test drive if the truth be told. It's passed all my HP/ Car Vertical checks and I'm also going to have it inspected by a local Jaguar specialist. If all that checks out, then I'll pull the trigger. However, despite best efforts, the rest really is in the hand of the gods!
I'm encouraged to hear your higher mileage XF is providing effortless, reliable and relaxing motoring. Fingers crossed, I'm heading the same way! Thanks again.