In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the X6 are reminded to check the back seat if they opened the rear door before starting out. The A6 Allroad doesn’t offer a back seat reminder.
The X6 has standard Active Head Restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Active Head Restraints system moves the headrests forward to prevent neck and spine injuries. The A6 Allroad doesn’t offer a whiplash protection system.
The X6 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 Allroad’s blind spot costs extra.
To help make backing out of a parking space safer, the X6 has standard Cross Traffic Warning, helping the driver avoid collisions. Audi charges extra for Rear Cross-Traffic Assist on the A6 Allroad.
The X6’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The A6 Allroad doesn’t offer a driver alert monitor.
Both the X6 and the A6 Allroad have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, lane departure warning systems, rearview cameras and available around view monitors.
The BMW X6 weighs 516 to 814 pounds more than the Audi A6 Allroad. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.