The A8's aluminum space frame, its rear-seat side airbags and front-seat knee airbags go above and beyond the call of safety. But as of now, neither the IIHS nor the NHTSA has crash-tested one, so data is lacking.
The A8 also has a pre-crash system that tightens seat belts, and all-wheel drive is standard.
A rearview camera still is an option, almost inexcusable in a car this expensive, but parking sensors come standard. On pricey models a surround-view camera system shows how it's done in the ultra-luxury class.
An expensive bundle of technology adds night vision to the A8, as well as blind-spot monitors, adaptive cruise control, and active lane control. The cruise system can stop the car from speeds of up to 19 mph, if the car senses an impending collision.