What technology allows the Audi A8 to have seamless lane changes?

I've heard about Audi's lane keeping assist and lane departure warning systems, but what technology actually allows the A8 to change lanes smoothly without jerky movements or disengagement?

Based on Audi's marketing materials, the A8 utilizes a combination of sensors, cameras, and data processing algorithms to accurately predict and execute smooth lane changes. However, in real-world situations, it may still require some human intervention to ensure safety.