2020 Mercedes AMG S-Class vs. 2020 Audi S6

Detailed Review, Specifications & Comparison

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Safety

© 1999 - 2020 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 2020/09/28

The AMG S-Class 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 S6 doesn’t offer a whiplash protection system.

The AMG S-Class’ 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 S6 doesn’t offer a driver alert monitor.

Both the AMG S-Class and the S6 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, lane departure warning systems, rearview cameras, available night vision 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 AMG S-Class’ warranty.

Reliability

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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.

Engine

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The AMG S 63 Sedan’s standard 4.0 turbo V8 produces 159 more horsepower (603 vs. 444) and 221 lbs.-ft. more torque (664 vs. 443) than the S6’s 2.9 turbo V6 hybrid. The AMG S 65 Sedan’s standard 6.0 turbo V12 produces 177 more horsepower (621 vs. 444) and 295 lbs.-ft. more torque (738 vs. 443) than the S6’s 2.9 turbo V6 hybrid.

Fuel Economy and Range

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An engine control system that can shut down some of the engine’s cylinders helps improve the AMG S 63’s fuel efficiency. The S6 doesn’t offer a system that can shut down part of the engine.

The AMG S-Class has 1.8 gallons more fuel capacity than the S6 (21.1 vs. 19.3 gallons), for longer range between fill-ups.

Transmission

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A nine-speed automatic is standard on the Mercedes AMG S-Class, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the S6.

The AMG S-Class’ launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The S6 doesn’t offer launch control.

Brakes and Stopping

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For better stopping power the AMG S-Class’ optional brake rotors are larger than those on the S6:

AMG S-Class

S6

Front Rotors

16.5 inches

15.8 inches

Rear Rotors

14.2 inches

13.8 inches

The AMG S-Class offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The S6 doesn’t offer ceramic brake rotors.

Tires and Wheels

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For better traction and acceleration, the AMG S-Class has larger rear tires than the S6 (285/40R20 vs. 255/40R20).

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the AMG S-Class can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The S6 doesn’t offer run-flat tires.

Suspension and Handling

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The AMG S 65 Sedan offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Audi doesn’t offer an active suspension on the S6.

The AMG S-Class has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The S6 doesn’t offer a load leveling suspension.

The AMG S-Class’ 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 S6 doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the AMG S-Class’ wheelbase is 9.3 inches longer than on the S6 (124.6 inches vs. 115.3 inches).

For better maneuverability, the AMG S 65 Sedan’s turning circle is 1.6 feet tighter than the S6’s (38.1 feet vs. 39.7 feet). The AMG S 63 Sedan’s turning circle is .7 feet tighter than the S6’s (39 feet vs. 39.7 feet).

Passenger Space

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Because it has more passenger and cargo room, the EPA rates the AMG S-Class a Large car, while the S6 is rated a Mid-size.

The AMG S-Class has 13 cubic feet more passenger volume than the S6 (112 vs. 99).

The AMG S-Class has 1.7 inches more front headroom, .1 inches more front legroom, 1.9 inches more front shoulder room and 2.6 inches more rear shoulder room than the S6.

For enhanced passenger comfort on long trips the AMG S-Class’ available rear seats recline. The S6’s rear seats don’t recline.

Cargo Capacity

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The AMG S-Class Sedan has a much larger trunk than the S6 (18 vs. 13.7 cubic feet).

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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The AMG S-Class has a standard remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The S6 doesn’t offer a remote starting system.

Heated windshield washer fluid is standard on the AMG S-Class to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The S6 doesn’t offer heated windshield washer fluid.

Optional air conditioned front and rear seats keep the AMG S-Class’ passengers comfortable and take the sting out of hot leather in summer. The S6 doesn’t offer air-conditioned seats in the rear.

The AMG S-Class has standard massaging front seats. Massaging front seats cost extra on the S6, and are only available on the S6 Prestige. The AMG S-Class also offers optional massaging rear seats in order to maximize comfort and eliminate fatigue on long trips. Massaging rear seats aren’t available in the S6.

The AMG S-Class 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 S6 doesn’t offer a house-current electrical outlet.

The AMG S-Class’ Active Parking Assist can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The S6 doesn’t offer an automated parking system.

Model Availability

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The Mercedes AMG S-Class comes in coupe, convertible and sedan bodystyles; the Audi S6 isn’t available as a coupe or convertible.

The AMG S-Class is available in both rear-wheel drive and all-wheel drive configurations. The S6 doesn’t offer a two-wheel drive configuration.

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