Hellohttp://teslamag.de/news/model-s-p85d-accident-tempomat-3141 Reading the manual would certainly have helped: Here is an excerpt from the current manual (page 84): Operation of the automatic emergency braking If the Model S is equipped with autopilot (see About the autopilot on page 73), the lane in front of the Model S is monitored using the front-facing camera and the radar sensor. This allows the distance to any vehicle in front of the Model S, Mo The automatic emergency braking system is designed to automatically operate the brakes to dampen the impact in the event of an inevitable frontal collision. When the brakes are operated by the automatic emergency braking system, an optical warning appears on the instrument panel and you hear a signal tone. In addition, you may notice an abrupt downward movement of the brake pedal. As soon as the speed is reduced by 40 km/h (25 mph), the brakes will be released. If, for example, the brakes are operated by automatic emergency braking at a speed of 90 km/h (56 mph), they will be released once the speed is 50 km/h (31 mph). The automatic emergency braking only works at a speed of between 8 and 140 km/h.