You can find information on the assistance graphic menu under "Assistance graphic" More.
If you set the speed, the Assistance graphic briefly appears in the multifunction display.
When Active Distance Assist DISTRONIC is activated, one or two indicator segments light up in the stored speed range of the speedometer.
If Active Distance Assist DISTRONIC detects a vehicle in front, the indicator segments, located between the speed of the vehicle in front and the stored speed, light up.