A friend of mine will be working in Thailand for 5-6 months. He's leaving in April. He had planned to sell his car (2001 Jetta VR6) but didn't get around to it in time and probably won't manage to do so before he leaves. He's thinking about renting a storage spot and parking the car w/ a car cover for the duration of his trip, which could be extended up to a year. Aside from pulling the battery, is there anything he should do to insure the car starts up again without trouble?