Start Stop automatic in smart a security risk?

Hello guys, if you don’t mind that the so-called Start Stop automatic in the smart is also partly responsible for the fact that the standard built-in scrap battery gives up the mind early, it is in my opinion a serious safety risk. The situation: I drive at a green traffic light into a junction and want to turn left. Since oncoming traffic is I stop in the middle of the intersection, car goes off. Now there is a gap in the oncoming traffic and I go down from the brake. with the Smart does not start like with other vehicles in the second where I walk off the gas, but only with considerable delay. Apparently, a starter is installed here, which has not yet been designed for a start stop automatic. Almost there would have been a collision.