Audi A3  Driver assistance  Driver assist systems  Audi adaptive cruise control
Applies to vehicles: with Audi adaptive cruise control
The adaptive cruise control is a combined speed and distance control system. It assists the driver by controlling the road speed and the distance to the vehicle in front within certain limits imposed by the system. The adaptive cruise control system can accelerate and brake when it detects a vehicle in front. This provides maximum comfort both on long motorway journeys and, in conjunction with an automatic gearbox*, in congested traffic.
What can the adaptive cruise control do?
The adaptive cruise control uses a radar and video camera. The radar is subject to certain system limitations Link.
When there is no traffic in front, the adaptive cruise control works just like a normal cruise control system by maintaining a constant speed. When you draw closer to a vehicle in front which is detected by the system, the adaptive cruise control matches your speed to that vehicle by automatically applying the brakes, and then maintains a constant distance (which you can adjust in the settings). As soon as it detects no more vehicles in front, the adaptive cruise control accelerates back up to the cruising speed.
Applies to vehicles with automatic gearbox*: In congested traffic, the adaptive cruise control can brake down to a standstill (subject to general system limitations) and accelerate again under certain conditions Link.
Which functions can the driver control?
When you switch on the adaptive cruise control, you can set your current speed as the "cruising speed" Link.
While you are driving, you can interrupt the cruise control Link or change the speed setting Link at any time.
You can also change the following settings:

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