Final answer:
Hill start assist varies depending on the car model and settings. Consult the vehicle's owner's manual or contact the manufacturer for accurate information.
Step-by-step explanation:
Hill start assist is a feature in automobiles that helps prevent the car from rolling backward when starting on an incline. It holds the brakes for a certain amount of time to give the driver enough time to engage the clutch and accelerator. The duration of this brake hold can vary depending on the specific car model and its settings.
Therefore, it is not possible to provide a specific time for how long hill start assist holds the brakes. The correct answer to your question is that it varies and depends on the car. Each manufacturer sets the duration of hill start assist differently. Some vehicles might hold the brakes for 1 second, while others might hold them for several seconds. It is important to consult the vehicle's owner's manual or contact the manufacturer to get accurate information about the specific car's hill start assist functionality.