My SL sits untouched for 3-4 months at a time. I don't do anything special to it at all. Not even disconnecting the battery. When it's time to go for a ride, I turn the key, let it idle for 5 mins or so, then drive away. If you were storing it for a year or more, I'd look into more specialized methods of preserving the car, but if it's only a couple to a few months, the car isn't really going to suffer.