The 500 Start&Stop is a model based on the 1.2 Lounge, with the start-stop system, designed and supplied by Bosch and Fiat Powertrain Technologies, stops the engine automatically whenever traffic conditions bring the car to a complete stop and restart it when the driver wants to move off again. The car reduces fuel consumption by up to 12% over a regular 1.2 Lounge in urban driving, with 113g/km CO2 emission. Other standard features include hands-free telecommunications and entertainment systems. It costs in the UK.