As far as I understand their technology this is not true. My understanding is that the system keeps a distance to a vehicle in front and corrects the steering should the vehicle leave the lane.
Even Audi themselves offers active lane keeping assist and adaptive cruise control systems. I'm not sure if this is available in the A4, but they offer it in their more expensive models. Mercedes-Benz also has both systems available in the S-Class.
I couldn't find any detailed information on their site as to what they cover, so please correct me if I'm wrong, but I don't see their additional value right now.
Even Audi themselves offers active lane keeping assist and adaptive cruise control systems. I'm not sure if this is available in the A4, but they offer it in their more expensive models. Mercedes-Benz also has both systems available in the S-Class.
I couldn't find any detailed information on their site as to what they cover, so please correct me if I'm wrong, but I don't see their additional value right now.