Certified Benz & Beemer Compares 2016 Mercedes Benz S-Class VS 2016 Cadillac CT6 Near Scottsdale, AZ

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2016 Mercedes Benz S-Class

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VS

2016 Cadillac CT6

Safety Comparison

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The rear seatbelts optional on the S-Class inflate when a collision is detected, helping to spread crash forces over a much larger area of the body and limiting head and neck movement. This can help prevent spinal and internal injuries. The CT6 doesn’t offer inflatable seatbelts.

The 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 doesn’t offer a driver alert monitor.

Both the S-Class and the CT6 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, daytime running lights, rearview cameras, available night vision systems, lane departure warning systems, blind spot warning systems and around view monitors.

Reliability Comparison

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J.D. Power and Associates’ 2015 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 14th in initial quality, above the industry average. With 11 more problems per 100 vehicles, Cadillac is ranked 21st, below the industry average.

Engine Comparison

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The S-Class has more powerful engines than the CT6:

Horsepower

Torque

S550e 3.0 turbo V6 hybrid

436 HP

479 lbs.-ft.

S550 4.7 turbo V8

449 HP

516 lbs.-ft.

S600 5.5 turbo V12

523 HP

612 lbs.-ft.

S63 AMG 5.5 turbo V8

577 HP

664 lbs.-ft.

S65 AMG 6.0 turbo V12

621 HP

738 lbs.-ft.

CT6 2.0 turbo 4 cyl.

272 HP

295 lbs.-ft.

CT6 3.6 DOHC V6

335 HP

285 lbs.-ft.

CT6 3.0 turbo V6

404 HP

400 lbs.-ft.

As tested in Motor Trend the Mercedes S-Class is faster than the Cadillac CT6 twin turbo V6:

S550

S600

CT6

Zero to 60 MPH

4.7 sec

4.7 sec

5 sec

Quarter Mile

13.2 sec

13.1 sec

13.4 sec

Speed in 1/4 Mile

107.7 MPH

112 MPH

105 MPH

Fuel Economy and Range Comparison

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The S550e can drive on battery power alone for up to 18.6 miles. The CT6 must run its internal combustion engine to move.

Regenerative brakes improve the S-Class Hybrid’s fuel efficiency by converting inertia back into energy instead of wasting it. The CT6 doesn’t offer a regenerative braking system.

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

Brakes and Stopping Comparison

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For better stopping power the S-Class’ brake rotors are larger than those on the CT6:

S550

S63/S65

CT6 2.0

CT6 V6

Front Rotors

14.6 inches

16.5 inches

12.6 inches

13.6 inches

Rear Rotors

14.2 inches

14.1 inches

12.4 inches

12.4 inches

The S-Class S63/S65 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 doesn’t offer ceramic brake rotors.

Tires and Wheels Comparison

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For better traction, the S-Class has larger standard tires than the CT6 (F:245/40R20 & R:275/35R20 vs. 235/50R18). The S63/S65’s tires are larger than the largest tires available on the CT6 (F:255/40R20 & R:285/35R20 vs. 245/45R19).

The S-Class’ standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the CT6’s standard 50 series tires. The S-Class’ optional 275/35R20 rear tires have a lower 35 series profile than the CT6’s optional 40 series tires.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the 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 doesn’t offer run-flat tires.

Suspension and Handling Comparison

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

The S-Class offers an available 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.

The 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 doesn’t offer a load leveling suspension.

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

The Maybach S600 handles at .88 G’s, while the CT6 AWD pulls only .86 G’s of cornering force in a Car and Driver skidpad test.

Chassis Comparison

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As tested by Car and Driver, the interior of the S550 is quieter than the CT6 AWD:

S-Class

CT6

At idle

40 dB

49 dB

Passenger Space Comparison

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The S-Class has 1.4 inches more front shoulder room, 1.2 inches more rear headroom, 2.6 inches more rear legroom and 3 inches more rear shoulder room than the CT6.

Cargo Capacity Comparison

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The S-Class has a larger trunk than the CT6 (16.3 vs. 15.3 cubic feet).

Ergonomics Comparison

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The 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 CT6 doesn’t offer a remote starting system.

The S-Class’ rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The CT6’s standard intermittent wipers change speed with vehicle speed, but can’t turn on and off or change speed based on changing rainfall.

Heated windshield washer fluid is standard on the S-Class to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The CT6 doesn’t offer heated windshield washer fluid.

The CT6 Luxury/Premium/Platinum’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The 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.

To better shield the driver and front passenger’s vision, the S-Class has standard dual-element sun visors that can block glare from two directions simultaneously. The CT6 doesn’t offer secondary sun visors.

Recommendations Comparison

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The Mercedes S-Class won two awards in Kiplinger’s 2015 car issue.

 The S-Class is ranked first in its class and received the 2015 “Total Quality Award.” The CT6 is not ranked.

The S-Class was chosen as one of Automobile Magazine’s “All Stars” for 3 of the last 17 years. The CT6 has never been an “All Star.”

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