With a combination of video cameras and short - and long - distance radar sensors, the A6 maintains a safe following distance in stop - and - go traffic. (kbb.com)
Low - speed forward automatic braking and following distance indicator, which shows you how far you are from the car in front, as well as driver - position memory settings are standard. (edmunds.com)
Increasing following distance will never work against you, so back off! (drive-safely.net)