Other road users may not hear or may ignore the warning tone of the reversing warning device. There is a risk of an accident.
The reverse warning device is a system designed to assist you in ensuring the safety of other road users. The reverse warning device cannot guarantee that no persons or objects are situated behind the vehicle.
A warning tone sounds to alert other road users when the reverse gear is engaged. If reverse gear is engaged twice in quick succession, the volume of the warning tone is lowered, for example, for night-time operation. The warning tone sounds at a normal volume by default. The volume of the warning tone has to be lowered again each time you engage reverse gear, if necessary.
When using the reverse warning device described here, observe the legal requirements for the country you are currently in.