Stop Start Technology

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"It's a great idea, in theory. Your engine shuts off at red lights, stop signs, and busy Taco Bell drive-throughs—whenever a momentary pause provides an opportunity to save some fuel.

In practice, stop/start systems are annoying, pointless, and sometimes dangerous. Your car is barely using any fuel at idle anyway, and when it fires back up it's with a burp and a shudder, like someone startled grandpa during his nap.

And that's if you're lucky enough that it actually restarts. We've had three cars from three different companies execute the stop part of the equation and then fail to restart. So on the plus side, you save a thimble of fuel. Downside: Enraged truckers slash your tires as your lane sits through two traffic-light cycles behind your wondrous miracle of efficiency.

Fortunately, every car with stop/start comes with another feature: a button to turn it off".
http://www.popularmechanics.com/cars...gines-already/
Bold emphasis is mine....