I don't think I would recommend the 335d for Alaska. I assume your roads can be pretty rough due to the cold/winter climate, i.e. lots of potholes, cracks, etc...
That would be really rough on a car like the 335d.
It also sounds like your diesel quality up there could be a bit problematic as well. Also not a good thing for the 335d. May be a bit too refined for your area.
Just my opinion. I'd stick with a truck for sure.
Snipe, you have any words for this guy?