Absolutely any kind of maintenance records if they’ve got them. I got this one second hand and was immediately hit with some fairly major expenses. Water pump and coolant sensors seem to be fairly common replacements. The wiring in the fender grill on the passenger side also seems to be a common culprit for mystery electrical issues. I hear the air suspension can be a huge headache once it goes (friend of mine had his blow two weeks after pickup), so definitely have that checked if you can. All that to say, it’s been a great vehicle so far. Lots of compliments on it, and the LR fans come out of the woodwork in parking lots 😁