Adjusting the time interval to vehicles ahead
When you are driving with Pilot Assist active, your car will try to adapt its driving speed to that of other vehicles. You can adjust your car's general distance-keeping by adjusting the time interval to vehicles ahead using the time interval button 
on your steering wheel. The car then manages acceleration and braking to maintain that time interval.
The selected time interval is shown in the time interval indicator in the driver display.
When adjusting the time interval to vehicles ahead, the number of lines will either increase or decrease depending on your adjustment. More lines indicate a longer time interval and greater general distance to vehicles ahead, whereas fewer lines indicate the opposite.
Important
Changing driver support settings
Make sure that you understand how changing the car's settings affects its behaviour. It is particularly important when it comes to features that affect the level of assistance the car can provide.
on your steering wheel select your desired time interval to vehicles ahead.