It`s a 3 month old battery after similar problems with the previous one and there is definitely too much current draining away when the car is not in use @Tmoose. I have disconnected the radio/6cd player/built in GPS system (one unit, standard equipment)and it is much better, time will tell...
Suffering from a battery that deteriorates after a couple of days of inactivity to the point that it wont crank the engine? It is very hard to determine the battery drain with an inexpensive multimeter. If you try to determine the "resting" discharge current and the car has GPS permanently...