Welcome to the Club, Jase.
The 2.2 Diesel is a good engine and used on the XF. I would check that the EGR valve has not been blanked off, and the Diesel Particulate Filter [DPF] has not been removed as from 20th May 2018 either alteration mean an automatic MOT Failure.
The car looks quite clean and straight, and although the mileage is above average it does look to have been a car that has given good service.
Regards,
Peter.