►Audi RS 3 ►Controls and displays ►Instruments and warning/indicator lamps ◀Warning and indicator lamps
The warning lamp 
lights up and does not go out until the driver's and front passenger's* seat belts have been fastened. When the vehicle has gathered speed you will also hear a warning chime.
lights up and does not go out until the driver's and front passenger's* seat belts have been fastened. When the vehicle has gathered speed you will also hear a warning chime.Note
For further information on the seat belts
►Link.