Just something to consider. I've had the same problem in the past with both my 3rd Generation and 4th Generation. From what I read at the time was that the recommended battery wasn't adequate enough for the vehicle, especially for vehicles that had power doors and liftgate, and where journeys were primarily short. What I found that worked for me was to upgrade the battery to a higher Ah, which in my case I changed to a 84Ah with a little modfication to the battery tray, and also changing out all of the interior lights to led equivalents. I've not had any further problems since.