2020 Mercedes AMG S-Class vs. 2020 Cadillac CT6-V

Detailed Review, Specifications & Comparison

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Safety

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For enhanced safety, the front and rear seat shoulder belts of the Mercedes AMG S-Class have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Cadillac CT6-V doesn’t offer pretensioners for the rear seat belts.

The AMG S-Class offers an optional Surround View Camera to allow the driver to see objects all around the vehicle on a screen. The CT6-V only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

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 CT6-V doesn’t offer a driver alert monitor.

Both the AMG S-Class and the CT6-V have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, 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, blind spot warning systems, rearview cameras, available night vision systems and rear cross-path warning.

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 Cadillac vehicles. J.D. Power ranks Mercedes 12th in initial quality. With 6 more problems per 100 vehicles, Cadillac is ranked 17th.

J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Mercedes vehicles are more reliable than Cadillac vehicles. J.D. Power ranks Mercedes 13th in reliability, above the industry average. With 32 more problems per 100 vehicles, Cadillac is ranked 23rd.

From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Mercedes vehicles are more reliable than Cadillac vehicles. Consumer Reports ranks Mercedes 9 places higher in reliability than Cadillac.

Engine

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The AMG S 63 Sedan’s standard 4.0 turbo V8 produces 53 more horsepower (603 vs. 550) and 24 lbs.-ft. more torque (664 vs. 640) than the CT6-V’s 4.2 turbo V8. The AMG S 65 Sedan’s standard 6.0 turbo V12 produces 71 more horsepower (621 vs. 550) and 98 lbs.-ft. more torque (738 vs. 640) than the CT6-V’s 4.2 turbo V8.

Fuel Economy and Range

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On the EPA test cycle the AMG S 63 Sedan 4MATIC gets better fuel mileage than the CT6-V (17 city/26 hwy vs. 14 city/25 hwy).

The AMG S-Class has 1.9 gallons more fuel capacity than the CT6-V (21.1 vs. 19.2 gallons), for longer range between fill-ups.

Brakes and Stopping

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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 CT6-V doesn’t offer ceramic brake rotors.

Tires and Wheels

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For better traction, the AMG S-Class has larger tires than the CT6-V (F:255/45R20 & R:285/40R20 vs. 245/40R20).

The AMG S 65 Sedan’s 285/35R20 rear tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the CT6-V’s 40 series tires.

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 CT6-V doesn’t offer run-flat tires.

Suspension and Handling

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The front and rear suspension of the AMG S-Class uses air springs for a smoother, controlled ride than the CT6-V, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

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. Cadillac doesn’t offer an active suspension on the CT6-V.

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 CT6-V 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 CT6-V doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the AMG S-Class’ wheelbase is 2.2 inches longer than on the CT6-V (124.6 inches vs. 122.4 inches).

For better handling and stability, the average track (width between the wheels) on the AMG S-Class is 1.1 inches wider in the front and .7 inches wider in the rear than the track on the CT6-V.

Passenger Space

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The AMG S-Class has 1.4 inches more front shoulder room and 2.9 inches more rear shoulder room than the CT6-V.

Cargo Capacity

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The AMG S-Class Sedan has a much larger trunk than the CT6-V (18 vs. 15.8 cubic feet).

A low lift-over trunk design makes loading and unloading the AMG S-Class easier. The AMG S-Class’ trunk lift-over height is 27.4 inches, while the CT6-V’s liftover is 29.1 inches.

Ergonomics

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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 CT6-V doesn’t offer heated windshield washer fluid.

The CT6-V’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The AMG S-Class’ standard adaptive cornering lights turn the actual headlight unit up to several degrees, depending on steering wheel angle and vehicle speed. This lights a significant distance into corners at any speed.

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 CT6-V doesn’t offer air-conditioned seats in the rear.

On extremely cold winter days, the AMG S-Class’ optional heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the car heater warms up. The CT6-V doesn’t offer a heated steering wheel.

The AMG S-Class has standard massaging front seats. Massaging front seats are only available on the CT6-V Platinum. 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 CT6-V.

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 CT6-V doesn’t offer a house-current electrical outlet.

Model Availability

© 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 2020/02/21

The Mercedes AMG S-Class comes in coupe, convertible and sedan bodystyles; the Cadillac CT6-V 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 CT6-V doesn’t offer a two-wheel drive configuration.

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