The City Emergency Braking function is a system extension to Front Assist on all models above the up! The system operates in the speed range up to 30 km/h and scans the space ahead of the Volkswagen using a radar sensor. If the driver does not react in the event of an impending collision with a vehicle ahead or a stationary vehicle, the system primes the brakes in the same way as Front Assist. If necessary, the City Emergency Braking function then automatically initiates an emergency stop to mitigate the severity of any collision. Also, if the driver does not brake sufficiently hard, the system applies the maximum braking force.