Validate all servicing done at volvo
Validate it's been back to volvo for software updates within last 12 months
Otherwise the drive-e i4 d5 motor is pretty solid in general as is the 8 speed auto...
If you want AWD... check for it via looking for the rear diff and cv's
Volvo did sell many 2wd d5 xc60s as well as t5 2wd units
