I often leave my car (360 Modena) unattended for weeks at a time. The Ferrari dealer from where I purchased the vehicle admonished me to always use the factory charger whileI am away, so that the battery does not die (it seems that the battery in this car will discharge itself within one week if not used). If the battery does in fact die (which mine of course did when the complicated factroy charger failed to work properly while I was out of town for two weeks), the dealer claims that the vehicle cannot be jump started and must be towed to the dealer so that all of the computer settings can be reset. I found this hard to believe, so I simply attached a trickle charger to the battery (located behind the passenger footwell), and the car started right up after a one hour charge. In addition, after letting the vehicle run at idle for about five minutes (it ran eratically for those five minutes), it completely reset all engine functions and has been perfoming completely normal ever since. Has anyone experienced this? Am I just lucky that my car ran normal after a dead battery? Is there any validity to the dealer's claim? Also, I have since refused to use the annoying factory charger (which must be connected to an 8-pin receptacle under the hood), and instead now use one of those "battery tenders" which plugs into the cigarete lighter (I use an old one a bought for a Porsche sometime ago). It works great, and I have had no problem since.