Car Will Not Start problems of the 2000 Mercedes Benz CLK320

Backing out of the driveway and into traffic the car completely shut down in the middle of traffic. Both lanes came to a screeching halt. The car would not restart or allow me to put it in neutral to push it to the side. This happened on several other occasions where the car completely dies as you are driving and you have to try and get the car over to the side of the road. It has also happened as I am pulling out into traffic which is a very scary situation. The mercedes dealer is unable to duplicate the failure in their shop and there are no fault codes associated with the problem. The battery was replaced and this has not corrected the problem either. I am very frustrated and at a loss with this situation.