I live in the Northeast and I am just getting ready to put my '07 M6 away for the Winter in a friends garage. They go away for the Winter down south so there is not someone regularly there to start the car. I bought the BMW battery charging system from my parts department at my local dealership. I plan on storing the car until May (about 4-5 months). Any advice on tips or tricks to make sure the car is ready to roll when the weather warms up? The parts guys said I can leave the battery charging system plug in and connected the whole time. Does that make sense? The hood would need to be slightly open for the cables to come out. I want to make sure I put the car away as clean as possible (which is tough now that the snow has started). Should I put the car away with a full tank of gas? Should I put in any additives? Should I surround the car with mothballs to keep any critters away? Should I cover up the tailpipes? Since I can get to the car in storage in about an hours drive, I can occassionally visit it to start it up. Is every two weeks too short? Too long? My main goal is to keep it off the roads with all the salt and rocks and have an X3 to keep that BMW feeling going through the Winter. Any and all advice would be appreciated. Thanks!