Remember to run the aircon (even in winter) at least once a fortnight, aircon systems are self lubricated, if you don't the seal will dry out and let the gas escape. When I was on my L's many years ago, I brought a car (VN Commodore) but was still acouple months away from getting my provisional license, I did the starting it up once a week thing, everything was fine except for one of the seals in my powersteering system, developed a leak while in storage. May be worth even waxing the paintwork as well before storage, don't want it to bubble up and cost a expensive respray.