What does the Hill Holder system do in the Fiat 500?
The Hill Holder is a system that helps the driver on hill starts. It cuts in when the ESP control unit perceives a difference in the inclination of the car through a longitudinal acceleration sensor on the floor under the front passenger seat. During a hill start, the control unit prepares to intervene when first speed is engaged and the brake and clutch pedals are depressed. The pressure on the front brake calipers is maintained for about 2 seconds after the driver releases the brake pedal, allowing him to set off without difficulty. You can read more about the Hill Holder system and other safety systems equipping the Fiat 500 here.
