The need for the stop-start function starts from the efficient and effective traffic jams, traffic signal every now and then, bumper to bumper traffic, etc. During such times, the car needs to be stopped and be idle which results in the loss of fuel. Some of the manufacturers have realized this problem and has come out with a solution by way of start-stop function. This is especially ideal for the car owners when they are struck in traffic lights. This helps in saving the fuel as well as money for the owner. Start-stop system shuts off the fuel supply to the engine automatically when the engine is in idle and restarts the vehicle again so that the fuel is saved and efficiency is enhanced. When you are at a traffic jam or traffic light then you need to engage car into neutral then release the clutch which will result in the shutting down of the engine after few seconds. When the driver wants to start the car, he simply has to press the clutch again to start it. Start-stop system consists of three major components i.e. internal combustion engine, Electric Starter/Generator and Battery. The system also comes with two ways energy process i.e. it could be transferred both forward as well as backward. The system comes with regenerative braking feature which generates the energy when you apply brake which results in the energy to be utilized which would otherwise be wasted. This energy is used by the engine to run the generator to produce electricity which will be stored in the battery of car. So when the car is stopped by using brakes, then the generator shuts off the IC engine. This also reduces burning of fuel when the vehicle is idle. When the clutch is pressed, the energy stored is used for starting the engine by starter. The electric starter will utilize the electricity stored in the battery to start the car and also reduces wastage of fuel and increases engine’s overall efficiency. Mahindra Scorpio comes with this feature where the ‘Micro Hybrid’ comes with a predetermined time of 5 seconds after that the engine switches off. The car will again start when the clutch pedal is pressed. Due to its fuel saving feature, the start-stop system is being accepted widely though it is only part of the full hybrid car. It is only a matter of time for this feature to be used in all the cars.