I really don't know the technical specs regarding the 4WD system. It does not have a low range, but it does have a switch to lock the centre dif. I haven't done much more off-road than the occasional dirt track in the car, but it seems very capable, obviosly though, (as has been stated) it's not going to compete with the likes of a land cruiser.
The car does have a recently serviced air conditioning unit.