2019 Audi Q7 vs. 2019 Mercedes E-Class Wagon

Detailed Review, Specifications & Comparison

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Both the Q7 and E-Class Wagon have child safety locks to prevent children from opening the rear doors. The Q7 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 Q7 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.

Over 200 people are killed each year when backed over by motor vehicles. The Q7 offers an optional backup collision prevention system which use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The E-Class Wagon doesn’t offer backup collision prevention brakes.

A passive infrared night vision system optional on the Q7 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 Q7 and the E-Class Wagon have standard driver and passenger frontal airbags, front side-impact 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 lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

The Audi Q7 weighs 430 to 804 pounds more than the Mercedes E-Class Wagon. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.

The National Highway Traffic Safety Administration does side impact tests on new vehicles. In this test, which crashes the vehicle into a flat barrier at 38.5 MPH and into a post at 20 MPH, results indicate that the Audi Q7 is safer than the Mercedes E-Class Wagon:



E-Class Wagon


Front Seat


5 Stars

5 Stars

Chest Movement

.8 inches

1.1 inches

Abdominal Force

128 G’s

149 G’s


Into Pole


5 Stars

5 Stars




Spine Acceleration

40 G’s

43 G’s

Hip Force

557 lbs.

836 lbs.

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, and with its optional front crash prevention system, the Insurance Institute for Highway Safety grants the Q7 the rating of “Top Pick” for 2017, a rating granted to only 139 vehicles tested by the IIHS. The E-Class Wagon has not been tested, yet.


The Q7’s corrosion warranty is 7 years longer than the E-Class Wagon’s (12 vs. 5 years).


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.

Fuel Economy and Range

To lower fuel costs and make buying fuel easier, the Audi Q7 uses regular unleaded gasoline (premium recommended for maximum performance). The E-Class Wagon requires premium, which can cost 20 to 55 cents more per gallon.

The Q7 has 1.4 gallons more fuel capacity than the E-Class Wagon (22.5 vs. 21.1 gallons), for longer range between fill-ups.

Brakes and Stopping

For better stopping power the Q7’s front brake rotors are larger than those on the E-Class Wagon:



E-Class Wagon

Front Rotors

14.8 inches

14.2 inches

The Q7 stops much shorter than the E-Class Wagon:



E-Class Wagon


70 to 0 MPH

166 feet

182 feet

Car and Driver

Tires and Wheels

For better traction, the Q7 has larger standard tires than the E-Class Wagon (255/55R19 vs. 245/45R18). The Q7’s optional tires are larger than the largest tires available on the E-Class Wagon (285/45R20 vs. 245/45R18).

For better ride, handling and brake cooling the Q7 offers optional 21-inch wheels. The E-Class Wagon’s largest wheels are only 19-inches.

Suspension and Handling

For a smoother ride and more stable handling, the Q7’s wheelbase is 2.2 inches longer than on the E-Class Wagon (117.9 inches vs. 115.7 inches).

For better handling and stability, the track (width between the wheels) on the Q7 is 3.4 inches wider in the front and 3.2 inches wider in the rear than on the E-Class Wagon.

Passenger Space

The Q7 has .9 inches more front headroom, .2 inches more front legroom, 1.7 inches more front shoulder room, 3 inches more rear legroom and 1.4 inches more rear shoulder room than the E-Class Wagon.

Third row passengers in the Q7 sit facing forward, making them more comfortable and giving them a better view. The third row passengers in the E-Class Wagon face rearward.

For enhanced passenger comfort on long trips the Q7’s middle row seats recline. The E-Class Wagon’s middle row seats don’t recline.

Cargo Capacity

The Q7’s cargo area provides more volume than the E-Class Wagon.



E-Class Wagon

Behind Third Seat

14.8 cubic feet

0 cubic feet

Third Seat Folded

37.5 cubic feet

24.5 cubic feet

Second Seat Folded

71.6 cubic feet

64 cubic feet

The Q7’s cargo area is larger than the E-Class Wagon’s in almost every dimension:



E-Class Wagon

Length to seat (3rd/2nd/1st)



Max Width



Min Width



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.


In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The Q7 offers available headlight washers to keep headlight output high. The E-Class Wagon doesn’t offer headlight washers.

To better shield the driver and front passenger’s vision, the Q7 has standard dual-element sun visors that can block glare from two directions simultaneously. The E-Class Wagon doesn’t offer secondary sun visors.

A manual rear sunshade is optional in the Q7 to help block heat and glare for the rear passengers. The E-Class Wagon doesn’t offer a rear sunshade.

The Q7 has standard heated front seats. Heated front seats cost extra on the E-Class Wagon. The Q7 also offers optional heated second row seats to keep those passengers extremely comfortable in the winter. Heated second row seats aren’t available in the E-Class Wagon.

Economic Advantages

According to The Car Book by Jack Gillis, the Q7 is less expensive to operate than the E-Class Wagon because typical repairs cost much less on the Q7 than the E-Class Wagon, including $376 less for a water pump, $139 less for a muffler, $22 less for a fuel pump and $471 less for a power steering pump.


Consumer Reports® recommends the Audi Q7, based on reliability, safety and performance.

The Q7 was chosen as one of Car and Driver’s “Top Five/10Best Trucks” for 2 of the last 2 years. The E-Class has never been a Car and Driver “Top Five/10Best Truck” pick.

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

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