hi, i have a 6 mths old 2019 new generation cayenne base, had few electronic problems thru the past few months, wasn't huge issue but still bothers. most recently the battery went flat and dead in a morning , called the roadside and boosted up, meanwhile checked there wasn't anything left on to drain the battery. the service manager in downtown porsche told me the new generation battery is very "smart " it knows to shut off when the car if parked over a week, to maintain the drainage of the battery. That means if you go away for a week or even 2 - 3 days you need to plug the battery in a power outlet to prevent the battery to drain. ？？？？？？ i think he is very knowledgeable about cars . doesn't he ? i need help here to know whats wrong and whats right about this problem