Hyundai Elantra: Description - Description and Operation - ISG (Idle Stop & Go) System - Fuel System - Hyundai Elantra MD 2010-2015 Service manualHyundai Elantra: Description

Idle Stop & Go (ISG) function automatically switches off the engine when the car is at a standstill if the and starts it again as soon as the brake pedal is released. This not only reduces fuel consumption, it also lowers emissions. Idle Stop & Go (ISG) function also has a built-in sensitivity to driving safety and comfort.
The engine is not switched off if certain conditions relating to safety and comfort have not been fulfilled (For example, when the engine oil is still cold, when the battery is running low or when the outside temperature is below 3°C). It can be deactivated by pressing the ISG OFF switch on the crash pad lower panel.
Sample scenario: switching off the engine at a standstill at a red traffic light or in stop-and-go traffic.
How to use:
Engine Auto-Stop: D-range + brake pedal is pressed.

Engine Auto-Start
Brake pedal is released.
Brake pedal is pressed + Manual range (Sports mode)
Brake pedal is pressed + R range