Pecheles Automotive Compares 2018 Audi Q7 VS 2018 Mercedes GLS Near Washington, NC

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2018 Audi Q7

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2018 Audi Q7

VS
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2018 Mercedes GLS

Safety Comparison

Both the Q7 and GLS 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 GLS’ 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 GLS 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 GLS doesn’t offer backup collision prevention brakes.

To help make backing safer, the Q7 Premium Plus/Prestige’s cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The GLS doesn’t offer a cross-path warning system.

Both the Q7 and the GLS 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 night vision systems, lane departure warning systems, blind spot warning systems and around view monitors.

For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, and its standard 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 120 vehicles tested by the IIHS. The GLS has not been tested, yet.

Warranty Comparison

The Q7’s corrosion warranty is 7 years longer than the GLS’ (12 vs. 5 years).

Reliability Comparison

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the Q7’s reliability 74 points higher than the GLS.

J.D. Power and Associates’ 2016 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 11th in reliability, above the industry average. With 1 more problems per 100 vehicles, Mercedes is ranked 12th.

From surveys of all its subscribers, Consumer Reports’ April 2017 Auto Issue reports that Audi vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Audi fourth in reliability. Mercedes is ranked 17th.

Engine Comparison

As tested in Motor Trend the Q7 3.0T is faster than the GLS 550:

 

Q7

GLS

Zero to 60 MPH

5.4 sec

5.6 sec

Quarter Mile

14 sec

14.2 sec

Speed in 1/4 Mile

100.2 MPH

97.6 MPH

Fuel Economy and Range Comparison

On the EPA test cycle the Q7 gets better fuel mileage than the GLS:

 

 

Q7

GLS

 

 

2.0T/Auto

19 city/25 hwy

n/a

 

 

3.0T/Auto

19 city/25 hwy

17 city/22 hwy

450/Auto

 

 

n/a

14 city/19 hwy

550/Auto

 

 

n/a

13 city/18 hwy

AMG 63/Auto

Regardless of its engine, the Q7’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) Mercedes only offers an automatic engine start/stop system on the GLS GLS450/GLS63 AMG.

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

Brakes and Stopping Comparison

For better stopping power the Q7’s standard brake rotors are larger than those on the GLS:

 

Q7

GLS

Front Rotors

14.8 inches

13.8 inches

Rear Rotors

13.8 inches

13.6 inches

The Q7 stops much shorter than the GLS:

 

Q7

GLS

 

70 to 0 MPH

166 feet

186 feet

Car and Driver

60 to 0 MPH

117 feet

126 feet

Motor Trend

60 to 0 MPH (Wet)

137 feet

146 feet

Consumer Reports

Tires and Wheels Comparison

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the Q7 can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The GLS doesn’t offer run-flat tires.

Suspension and Handling Comparison

The Q7 Prestige handles at .85 G’s, while the GLS 450 pulls only .74 G’s of cornering force in a Car and Driver skidpad test.

The Q7 Premium Plus executes Motor Trend’s “Figure Eight” maneuver 1.7 seconds quicker than the GLS 450 (26.4 seconds @ .68 average G’s vs. 28.1 seconds @ .62 average G’s).

Chassis Comparison

The Audi Q7 may be more efficient, handle and accelerate better because it weighs about 650 pounds less than the Mercedes GLS.

The design of the Audi Q7 amounts to more than styling. The Q7 has an aerodynamic coefficient of drag of .333 Cd (optional .32 Cd with Air Suspension). That is significantly lower than the GLS (.37 to .38) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the Q7 get better fuel mileage.

As tested by Car and Driver while under full throttle, the interior of the Q7 Prestige is quieter than the GLS 450 (70 vs. 71 dB).

Passenger Space Comparison

The Q7 has 1.4 inches more front legroom, 1 inch more front shoulder room, .3 inches more rear legroom and .2 inches more rear shoulder room than the GLS.

Cargo Capacity Comparison

To make loading groceries and cargo easier when your hands are full, the Q7’s cargo door can be opened and closed just by waving your foot, leaving your hands completely free. The GLS doesn’t offer a hands-free gesture to open its cargo door, forcing you to put cargo down if your hands are full.

Ergonomics Comparison

The Q7 Prestige has a standard heads-up display that projects speed and other key instrumentation readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The GLS doesn’t offer a heads-up display.

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

The Q7 has a standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. Dual zone air conditioning costs extra on the GLS.

Recommendations Comparison

Consumer Reports® chose the Audi Q7 as its “Top Pick,” the highest scoring vehicle in its category, based on reliability, safety and performance. The Mercedes GLS isn't recommended.

The Audi Q7 outsold the Mercedes GLS by 9% during the 2017 model year.

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