Parking Aid - Audible
WARNING: This page is about a different car, the 2018 Ford Fiesta. However, it is still accessible from the selected car via links, so may be relevant.
When the transmission is in reverse, the rear parking aid system sounds a variable rate warning tone through the audio speakers to alert the driver of stationary objects that are detected near the rear of the vehicle. The parking aid system is capable of detecting objects while the vehicle moves slowly in reverse. The rear parking aid system may not detect moving objects.