The Volkswagen front assist system with autonomous emergency braking is designed to not only warn you of a potential crash, but will assist by breaking to avoid a crash, or to lessen the effect of a crash, it does this even when adaptive cruise control is not engaged.
Using a radar sensor, front assist monitors the traffic in front of your vehicle, and helps identify possible hazards, for example, a driver that suddenly changes lanes in front of you, it could force you to break, if the front assist system determines that the distance is too close and the potential for a crash exist, it alert you with a warning in the instrument cluster coupled with a warning chime, and prepares the brakes for emergency braking, if you don't respond to the warning, the front assist system may briefly apply the brake, jolting the car to warn you of an imminent collision, if you don't press the brake hard enough, front assist can automatically apply the brakes with the additional necessary force to slow the vehicle down and help avoid a collision, if you don't break it all, front assist steps in and automatically implements emergency autonomous braking to fully stop the vehicle, and avoid a crash, or at least substantially lessen the effects of a collision.
Front assist also works when driving in heavy urban or suburban traffic, in stop-and-go traffic front assist monitors the vehicle in front of you, autonomous emergency braking is active from about 3 miles per hour, the radar detect vehicles, and depending on models, pedestrians, and the system automatically brakes to help mitigate rear-end collisions.
When driving under 18 miles per hour front assist detects stops vehicles helping to significantly reduce the possibility of rear-end collisions and lessen the effect of collisions that are unavoidable.
Source, transcript (Volkswagen of America)
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