Edema is the medical term for swelling. Body parts swell from injury or inflammation. It can affect a small area or the entire body. Medications, infections, pregnancy, and many other medical problems can cause edema. Edema happens when your small blood vessels become leaky and release fluid into nearby tissues.
Audi's adaptive cruise control is available on most models as part of the Advanced Technology Package or Driver Assistance Package. BMW's adaptive cruise control is available on most models as part of the ACC Stop & Go + Active Driving Assistant addition to the Driver Assistance Plus package.
A BMWs drive belt powers the accessories like the alternator, water pump(except some newer models), power steering pump, A/C compressor and the fan. It would make sense then, that reducing the amount of power these accessories draw from the engines output, the more power you have at the wheels.