I know that the seat brackets wear easy and brake. Check that they can fold down and brackets are in good condition. Usally they are not bad cars it is the insides that suffer as people usally buy them when they have lots of kids to run around and we all know what kids are like

A 2.0ltr wouldnt be my 1st choice, why have you decided to go for that one, sorry your farther in law? I would have looked for a diesel, a lot stronger and eco. I think a 2ltr will be very thristy as it is a heavy car. Air con is know to have faults so check that it is fully working.
All i would say is really go through the service history with a comb before you part with any money. Still would have looked for a diesel, what sort of budget has he got?