HIya,
I bought a 2011 XF-S about 3 years ago, just swapped it (yesterday) for a 2017 version.
There were bills - no doubt about that, (alternator, thermostat, brakes, suspension bushes, in addition to tyres and servicing).
But it was a total joy to drive and simply be in - hence going for the same again!
Hope you enjoy yours as much, if you go for it!
Cheers,
Jon