At the center of the action: ACC stop & go
The most important and complex driver assistance system in the new A6 is the new adaptive cruise control (ACC) with stop & go function and Audi pre sense front. This high-end radar cruise control regulates the speed and the distance of the sedan to the vehicle ahead by accelerating and braking in a range from 0 to 250 km/h (155.34 mph), and brakes the sedan automatically within certain limits. The driver uses the MMI operating system to determine how comfortably or sportily the system should work. Three levels and four distance modes are available.
The ACC stop & go makes use of a groundbreaking networking system in the vehicle to analyze data from up to 26 other systems. Its key information, however, comes from the two long-range radar sensors beneath the front of the vehicle, which operate in the frequency range of 76 to 77 GHz. They scan a field 250 meters (820.21 ft) long with an angle of aperture of 40 degrees. A small video camera in the base of the interior mirror looks ahead approximately 60 meters (196.85 ft), also with a 40-degree angle.
With this high level of information, the system can recognize complex scenarios and predictively support the driver. It also uses the predictive route data from the navigation system so that it can also reliably calculate the proper line on the highway even in curves.