I need to get a new car for the new year, and although we already have a mazda 5 2009, I need a decent size car for the family for road trips, toddler car seat and luggage. I narrowed it down to VWs, from mazda, audi and subaru. I like the 2010 Tiguan VW, the jetta and the passat and that includes the wagons. But....I am worried about the diesel on some of them since the car will be outside sometime for hours during winter times that can drop to -30 or - 40 here. I know you get more Torque with diesel, but the possibility of the car not starting during bad winter is a concern What says you?