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Both the A6 Allroad and E-Class Wagon have child safety locks to prevent children from opening the rear doors. The A6 Allroad has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The E-Class Wagon’s child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.
The A6 Allroad has a standard Secondary Collision Brake Assist, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The E-Class Wagon doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.
When descending a steep, off-road slope, the A6 Allroad’s standard Hill Descent Control allows you to creep down safely. The E-Class Wagon doesn’t offer Hill Descent Control.
A passive infrared night vision system optional on the A6 Allroad Prestige helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera to detect heat, the system then displays the image on a monitor in the dashboard. The E-Class Wagon doesn’t offer a night vision system.
Both the A6 Allroad and the E-Class Wagon have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, all-wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available blind spot warning systems and rear cross-path warning.
The A6 Allroad’s corrosion warranty is 7 years longer than the E-Class Wagon’s (12 vs. 5 years).
J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Audi vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Audi 8th in reliability, above the industry average. With 10 more problems per 100 vehicles, Mercedes is ranked 13th.
From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Audi vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Audi 7 places higher in reliability than Mercedes.
On the EPA test cycle the A6 Allroad gets better fuel mileage than the E 450 Wagon (20 city/26 hwy vs. 19 city/26 hwy).
Regenerative brakes improve the A6 Allroad’s fuel efficiency by converting inertia back into energy instead of wasting it. The E-Class Wagon doesn’t offer a regenerative braking system.
The A6 Allroad offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The E-Class Wagon doesn’t offer an SMG or a conventional manual transmission.
The A6 Allroad’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The E-Class Wagon doesn’t offer launch control.
For better stopping power the A6 Allroad’s front brake rotors are larger than those on the E-Class Wagon:
For better ride, handling and brake cooling the A6 Allroad has standard 20-inch wheels. Smaller 18-inch wheels are standard on the E-Class Wagon. The E-Class Wagon’s largest wheels are only 19-inches.
The A6 Allroad has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the E-Class Wagon, it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed.
For better handling and stability, the track (width between the wheels) on the A6 Allroad is 2.1 inches wider in the front than on the E-Class Wagon.
For better maneuverability, the A6 Allroad Prestige w/All-Wheel Steering’s turning circle is 2.6 feet tighter than the E-Class Wagon’s (36.4 feet vs. 39 feet).
The A6 Allroad has .8 inches more front headroom and 1.3 inches more rear legroom than the E-Class Wagon.
For enhanced passenger comfort on long trips the A6 Allroad’s rear seats recline. The E-Class Wagon’s middle row seats don’t recline.
The A6 Allroad’s power parking brake sets with one touch and releases with one touch or automatically. The E-Class Wagon’s parking brake has to released manually.
In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The A6 Allroad has standard headlight washers to keep headlight output high. The E-Class Wagon doesn’t offer headlight washers.
The A6 Allroad has standard heated front seats. Heated front seats cost extra on the E-Class Wagon. The A6 Allroad also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated second row seats aren’t available in the E-Class Wagon.
The A6 Allroad has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the car heater warms up. A heated steering wheel costs extra on the E-Class Wagon.
To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Audi A6 Allroad has a standard wireless phone charging system (Qi) in the center console. Wireless charging costs extra on the E-Class Wagon.
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