When it is really sunny outside the problem occurs. The car is black on black so it really absorbs the heat. Anyway, when I get in the car to start it up it seems to kick over. It sounds like a dead battery. I try not to give up but if I wait five to twenty mintues without doing anything the car will start up. I always have to wait five mintues. This happens even if I leave the car in the sun for twenty mintues. This only happens when I try to start the car. In fact, I was doing 75 mph for two straight hours and then I stopped for some food. When I tried to start the car, it didn't work. This happens every sunny day. I want to say it is something with the battery but my MB dealership doesn't have a clue. This problem even occurs if the car is idle. thank for helping out!