S 60 D5 Purchase aid

Hello together, still relatively undecided what I want to drive in the future, I also think about a used S 60 Diesel. I would like to have an automatic, air conditioning automatic and comfortable, tight seats, because I have approx. 200 km of working distance every day. Are there special problems with higher running performance? What do I have to pay attention to when buying? Are there recommendations for the equipment? Thank you in advance and greeting!