2019 Audi A6 vs. 2019 Mercedes E-Class Sedan

Detailed Review, Specifications & Comparison

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Safety

Both the A6 and E-Class Sedan have child safety locks to prevent children from opening the rear doors. The A6 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 Sedan’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 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 Sedan 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.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the A6. But it costs extra on the E-Class Sedan.

A passive infrared night vision system optional on the A6 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 Sedan doesn’t offer a night vision system.

Both the A6 and the E-Class Sedan 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, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

The A6’s corrosion warranty is 7 years longer than the E-Class Sedan’s (12 vs. 5 years).

Reliability

J.D. Power and Associates’ 2018 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 13th in reliability, above the industry average. With 6 more problems per 100 vehicles, Mercedes is ranked 15th.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Audi vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Audi 10 places higher in reliability than Mercedes.

Engine

The A6’s 3.0 turbo V6 hybrid produces 94 more horsepower (335 vs. 241) and 96 lbs.-ft. more torque (369 vs. 273) than the E 300 Sedan’s standard 2.0 turbo 4 cyl.

As tested in Motor Trend the Audi A6 is faster than the E 300 Sedan:

 

A6

E-Class

Zero to 60 MPH

5 sec

6.5 sec

Quarter Mile

13.5 sec

14.9 sec

Speed in 1/4 Mile

102.7 MPH

92.4 MPH

Fuel Economy and Range

On the EPA test cycle the A6 gets better fuel mileage than the AMG E 53 Sedan (22 city/29 hwy vs. 21 city/28 hwy). The A6 gets better fuel mileage than the E 450 Sedan (22 city/29 hwy vs. 20 city/28 hwy).

To lower fuel costs and make buying fuel easier, the Audi A6 uses regular unleaded gasoline (premium recommended for maximum performance). The E-Class Sedan requires premium, which can cost 20 to 55 cents more per gallon.

The A6 has 1.9 gallons more fuel capacity than the E-Class Sedan 300’s standard fuel tank (19.3 vs. 17.4 gallons), for longer range between fill-ups.

Transmission

The A6 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 Sedan doesn’t offer an SMG or a conventional manual transmission.

Brakes and Stopping

The A6 stops shorter than the E-Class Sedan:

 

A6

E-Class

 

60 to 0 MPH

107 feet

110 feet

Motor Trend

Tires and Wheels

For better traction, the A6’s optional tires are larger than the largest tires available on the E-Class Sedan (255/40R20 vs. 245/40R19).

The A6 Prestige’s optional tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the E-Class Sedan’s optional 40 series front tires.

For better ride, handling and brake cooling the A6 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the E-Class Sedan. The A6 Prestige’s optional 21-inch wheels are larger than the 19-inch wheels optional on the E-Class Sedan.

The A6 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 Sedan; 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. Some models of the E-Class Sedan don’t even offer run-flats.

Suspension and Handling

The A6 Prestige handles at .93 G’s, while the E 300 Sedan pulls only .90 G’s of cornering force in a Motor Trend skidpad test.

The A6 Prestige executes Motor Trend’s “Figure Eight” maneuver quicker than the E 300 Sedan (24.9 seconds @ .75 average G’s vs. 25.8 seconds @ .7 average G’s).

For better maneuverability, the A6’s turning circle is 1.8 feet tighter than the E-Class Sedan’s (36.4 feet vs. 38.2 feet). The A6’s turning circle is 2.6 feet tighter than the E 450 4MATIC Sedan’s (36.4 feet vs. 39 feet).

Passenger Space

The A6 has .6 inches more front headroom and 1.2 inches more rear legroom than the E-Class Sedan.

Cargo Capacity

The A6 has a larger trunk than the E-Class Sedan (13.7 vs. 13.1 cubic feet).

Servicing Ease

J.D. Power and Associates surveys of service recipients show that Audi service is better than Mercedes. J.D. Power ranks Audi third in service department satisfaction. With a 3% lower rating, Mercedes is ranked 6th.

Ergonomics

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 Premium Plus/Prestige has standard headlight washers to keep headlight output high. The E-Class Sedan doesn’t offer headlight washers.

The A6 has standard heated front seats. Heated front seats cost extra on the E-Class Sedan. The A6 also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the E-Class Sedan.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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