The Q50 has a standard blind spot warning system that uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them and moves the vehicle back into its lane. A system to reveal vehicles in the A6’s blind spot costs extra.
To help make backing out of a parking space safer, the Q50 has standard Rear Cross Traffic Alert and Back-up Collision Intervention automatically engages the brakes to help avoid a collision. Audi charges extra for Rear Cross-Traffic Assist on the A6.
Both the Q50 and the A6 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras and available all wheel drive.

