Safety ratings have changed in the A6 lineup since it was revamped for the 2009 model year.
Formerly a Top Safety Pick as rated by the IIHS (Insurance Institute for Highway Safety), the 2010 A6 still scores "good" ratings for front and side impact safety. The organization has changed its ratings system to account for roof-crush safety, but hasn't tested the A6 against the new standards. NHTSA (National Highway Traffic Safety Administration) has not tested the latest A6 lineup.
Dual front, side, and curtain airbags are standard, along with anti-lock brakes, traction and stability control, active headrests, and tire-pressure monitors.
A blind-spot alert system is optional, along with active cruise control, a lane-departure warning system, parking sensors, and a rearview camera. Visibility is mostly good.
Cars.com: A6 has "a first-aid kit"
Edmunds: "rear-seat side airbags are optional"