Why would you want to use such a feature? 1 mostly dry start a trip should be enough wear & tear on the engine. Subject a several thousand dollar lump of parts to save a few cents on gas. Makes no sense to me
I may be wrong but I believe it's when your seat detects you leaving the seat that the ESS turns off and the engine starts. As a photographer there are times I'll pull over to take a shot of something. Once I stop the ESS kicks in. As soon as I begin to lift my butt off the seat it turns off.