[villagetinker]

If you are friends with one of your neighbors, you might have them take the car out for a ride once a month, or if you use a house watch service you can see if they will do this. Most newer cars have a constant drain on the battery (computers, etc.), not a big drain, but over that period of time I would expect a dead battery which will probably need to be replaced. I tried a trickle charger on a car we have in storage, and the battery still failed after several months. If the battery completely drains, there may be some drive-ability problems until the computers re-calibrate themselves.
Bottom line, I would try to arrange to have the car driven several miles at least once a month.