Certified Benz & Beemer Compares 2017 Mercedes Benz GLS VS 2017 Audi Q7 Near Phoenix, AZ

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2017 Mercedes Benz GLS

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2017 Audi Q7

Safety Comparison

The GLS’ 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 Q7 doesn’t offer a driver alert monitor.

Both the GLS and the Q7 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.

Warranty Comparison

There are over 29 percent more Mercedes dealers than there are Audi dealers, which makes it easier should you ever need service under the GLS’ warranty.

Engine Comparison

The GLS has more powerful engines than the Q7:




GLS450 3.0 turbo V6

362 HP

369 lbs.-ft.

GLS550 4.7 turbo V8

449 HP

516 lbs.-ft.

GLS63 AMG 5.5 turbo V8

577 HP

561 lbs.-ft.

Q7 2.0T 2.0 turbo 4 cyl.

252 HP

273 lbs.-ft.

Q7 3.0T 3.0 supercharged V6

333 HP

325 lbs.-ft.

The GLS’ 3.0 turbo V6 diesel produces 3 more horsepower (255 vs. 252) and 184 lbs.-ft. more torque (457 vs. 273) than the Q7 2.0T’s standard 2.0 turbo 4 cyl. The GLS’ 3.0 turbo V6 diesel produces 132 lbs.-ft. more torque (457 vs. 325) than the Q7 3.0T’s standard 3.0 supercharged V6.

As tested in Motor Trend the GLS550 is faster than the Q7 3.0T:




Zero to 60 MPH

5.6 sec

5.7 sec

Quarter Mile

14.2 sec

14.3 sec

Speed in 1/4 Mile

97.6 MPH

97.5 MPH

Fuel Economy and Range Comparison

The GLS has 3.9 gallons more fuel capacity than the Q7 (26.4 vs. 22.5 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

For better stopping power the GLS63 AMG’s front brake rotors are larger than those on the Q7:




Front Rotors

15.4 inches

14.8 inches

Rear Rotors

14.2 inches

13.8 inches

The GLS stops shorter than the Q7:





60 to 0 MPH

115 feet

121 feet

Motor Trend

Tires and Wheels Comparison

For better traction, the GLS has larger standard tires than the Q7 (275/55R19 vs. 255/55R19). The GLS’ optional tires are larger than the largest tires available on the Q7 (295/40R21 vs. 285/45R20).

For better ride, handling and brake cooling the GLS63 AMG offers optional 22-inch wheels. The Q7’s largest wheels are only 21-inches.

The GLS 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 Q7; 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 Q7 don’t even offer run-flats.

Suspension and Handling Comparison

The GLS offers active sway bars, which help keep it flat and controlled during cornering, but disconnect at lower speeds to smooth the ride and offer greater off-road suspension articulation. This helps keep the tires glued to the road on-road and off. The Q7 doesn’t offer an active sway bar system.

The front and rear suspension of the GLS uses air springs for a smoother, controlled ride than the Q7, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

The GLS has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The GLS’ height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The Q7 doesn’t offer a load leveling suspension.

The GLS’ drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The Q7 doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the GLS’ wheelbase is 3.2 inches longer than on the Q7 (121.1 inches vs. 117.9 inches).

The GLS’ front to rear weight distribution is more even (49.7% to 50.3%) than the Q7’s (55% to 45%). This gives the GLS more stable handling and braking.

The GLS63 AMG handles at .86 G’s, while the Q7 Premium Plus pulls only .83 G’s of cornering force in a Motor Trend skidpad test.

For greater off-road capability the GLS has a 2.6 inches greater minimum ground clearance than the Q7 (10.9 vs. 8.3 inches), allowing the GLS to travel over rougher terrain without being stopped or damaged. The GLS’ minimum ground clearance is 2.3 inches higher than on the Q7 w/Air Suspension (12 vs. 9.7 inches).

Chassis Comparison

As tested by Car and Driver, the interior of the GLS450 is quieter than the Q7 Prestige:




At idle

37 dB

43 dB

70 MPH Cruising

65 dB

65 dB

Passenger Space Comparison

The GLS has 2.8 inches more front headroom, 1.2 inches more rear headroom, 3 inches more third row headroom, 5.8 inches more third row legroom and 1.1 inches more third row shoulder room than the Q7.

Cargo Capacity Comparison

The GLS’ cargo area provides more volume than the Q7.




Behind Third Seat

16 cubic feet

14.8 cubic feet

Third Seat Folded

49.4 cubic feet

37.5 cubic feet

Second Seat Folded

93.8 cubic feet

71.6 cubic feet

The GLS’ cargo area is larger than the Q7’s in every dimension:




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



Pressing a switch automatically lowers the GLS’ optional second and third row seats, to make changing between passengers and cargo easier. The Q7 doesn’t offer automatic folding second row seats.

Ergonomics Comparison

Unlike the driver-only memory system in the Q7, the GLS offers an optional passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

Heated windshield washer fluid is optional on the GLS to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The Q7 doesn’t offer heated windshield washer fluid.

The GLS has a 115-volt a/c outlet, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The Q7 doesn’t offer a house-current electrical outlet.

The GLS’ optional Parking Pilot can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The Q7 doesn’t offer an automated parking system.

Recommendations Comparison

Motor Trend selected the GLS as their 2013 Sport Utility of the Year. The Q7 has never been chosen.

The Mercedes GLS outsold the Audi Q7 by 12% during the 2016 model year.

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