A control unit shuts off the engine when stopped for extended periods of time, to save fuel.
Completely automatic fuel-efficiency. When the vehicle slows to below 5kph or when it comes to a stop, the control unit shuts off the engine. A powerful starter energized by a heavy-duty, deep-cycle battery can restart the engine instantaneously, so the vehicle is always ready to go even when the engine isn’t on. The start-stop system is highly effective. It is only inactive during the engine’s early warm-up phase, on roads with steep gradients and in extremely cold temperatures.