In the 2011 A8, Audi of course has all the fundamentals for a very safe, large sedan, including a strong aluminum space-frame structure, an extensive array of airbags (including front knee bags), and an advanced stability control system.
But thanks to a host of additional, truly advanced features, the A8 has some even more advanced features that are likely to help reduce the severity of a crash, even if you don't manage to avoid it. All A8 models include automatic emergency braking, which activates to lessen the impact of a collision it deems unavoidable. There's also a braking guard feature that warns the driver with a chime and jolt of the brakes. And whenever the accelerator is released abruptly, the brake system now primes itself and cleans the brake discs for best stopping response. Additionally, Audi's Pre Sense system adjusts seats, tenses seatbelts, and adjusts shocks to optimum positions when it senses an impending collision; it also activates the hazard lamps and partially brakes to lessen the severity.