The stop/start facility should be stopped and started as little as possible to produce longevity for consumable parts. The starter, oil, oil pump, battery, engine components are all effected by the stop start process so the fewer amount of times this process activates the better for you engine. VW did not fit this device for the longevity of you engine, my guess is it was fitted purely for the emissions/MPG process. You do not want the oil pump and oil flow stopped and started constantly in any engine...