2020 Mercedes GLC Coupe vs. 2020 Audi Q8

Detailed Review, Specifications & Comparison

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Safety

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The GLC Coupe has standard NECK-PRO front head restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the NECK-PRO front head restraints system moves the headrests forward to prevent neck and spine injuries. The Q8 doesn’t offer a whiplash protection system.

The GLC Coupe’s 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 Q8 doesn’t offer a driver alert monitor.

Both the GLC Coupe and the Q8 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.

Warranty

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There are over 26 percent more Mercedes dealers than there are Audi dealers, which makes it easier should you ever need service under the GLC Coupe’s warranty.

Reliability

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J.D. Power and Associates rated the GLC Coupe third among compact premium suvs in their 2019 Initial Quality Study. The Q8 isn’t in the top three in its category.

J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Mercedes vehicles are better in initial quality than Audi vehicles. J.D. Power ranks Mercedes 12th in initial quality. With 12 more problems per 100 vehicles, Audi is ranked 22nd.

Environmental Friendliness

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In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes GLC Coupe higher (5 out of 10) than the Audi Q8 (3). This means the GLC Coupe produces up to 16.5 pounds less smog-producing pollutants than the Q8 every 15,000 miles.

Transmission

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A nine-speed automatic is standard on the Mercedes GLC Coupe, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Q8.

Tires and Wheels

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Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the GLC Coupe can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Q8 doesn’t offer run-flat tires.

Suspension and Handling

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The GLC Coupe’s 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 Q8 doesn’t offer drift compensation steering.

For better maneuverability, the GLC 300 Coupe’s turning circle is 4.8 feet tighter than the Q8’s (38.7 feet vs. 43.5 feet).

Chassis

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The Mercedes GLC Coupe may be more efficient, handle and accelerate better because it weighs about 1000 pounds less than the Audi Q8.

The GLC Coupe is 9.9 inches shorter than the Q8, making the GLC Coupe easier to handle, maneuver and park in tight spaces.

The design of the Mercedes GLC Coupe amounts to more than styling. The GLC Coupe has an aerodynamic coefficient of drag of .33 Cd. That is lower than the Q8 (.35) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the GLC Coupe get better fuel mileage.

Passenger Space

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The GLC Coupe has 1.8 inches more front headroom and .2 inches more rear headroom than the Q8.

Cargo Capacity

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Pressing a switch automatically lowers the GLC Coupe’s rear seats, to make changing between passengers and cargo easier. The Q8 doesn’t offer automatic folding seats.

Servicing Ease

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J.D. Power and Associates surveys of service recipients show that Mercedes service is better than Audi. J.D. Power ranks Mercedes fifth in service department satisfaction. With a 13% lower rating, Audi is ranked 8th.

Ergonomics

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Heated windshield washer nozzles are standard on the GLC Coupe to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The Q8 doesn’t offer heated windshield washer nozzles.

To help drivers see further while navigating curves, the GLC Coupe offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The Q8 doesn’t offer cornering lights.

The GLC Coupe has a 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The Q8 doesn’t offer a house-current electrical outlet.

The GLC Coupe’s optional Active Parking Assist can parallel park or back into a parking spot by itself, starting and stopping automatically, with the driver only responsible for switching from reverse to drive. The Q8 doesn’t offer an automated parking system.

Economic Advantages

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Insurance will cost less for the GLC Coupe owner. The Complete Car Cost Guide estimates that insurance for the GLC Coupe will cost $3375 to $5225 less than the Q8 over a five-year period.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Mercedes GLC Coupe will be $16687 to $24913 less than for the Audi Q8.

Recommendations

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/11/19

Motor Trend selected the GLC Coupe as their 2017 Sport Utility of the Year. The Q8 has never been chosen.

The Mercedes GLC outsold the Audi Q8 by almost six to one during the 2019 model year.

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