Thanks. I'm still not sure as it goes on about automatic distance control then "You pre-set the speed range which you want the Adaptive Cruise Control to brake and accelerate the car within" nothing about distance you want to keep between you and the car in front or is that "the speed range"?!
Also in the blurb it states "The radar sensor is not capable of detecting stationary obstructions, such as the end of a tailback or crash barriers" yet in the graphic it shows the end of a tailback with the cars barely moving yet the Golf comes to a stop.
While I can't state how a DSG equipped car will behave, I have driven a golf with ADC. This was only at motorway speeds though, so I can't tell you if the minimum distance it keeps is dependent on the speed you are doing either (i.e. the 2 second rule).
However, yes, when you set the speed, you also set the distance you would like to keep between you and the car in front (like I said, there is a minimum). Once set, the car will automatically adjust its speed based on what is in front of you. With a clear road, it will cruise at the speed you set. If a car pulls in front of you and is slower, the car will automatically slow down to match the speed of the car in front to maintain that distance you set. If the car in front then speeds up, you will speed up. Or, if you pull out into an empty lane, it will automatically speed up and overtake. It's a neat system, and worked well.
If I understand correctly, a DSG car will effectively drive itself in stop-start traffic.
