2019 Cadillac CT6 vs. 2019 Mercedes S-Class

Detailed Review, Specifications & Comparison

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Safety

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the CT6 are reminded to check the back seat if they opened the rear door before starting out. The S-Class doesn’t offer a back seat reminder.

Over 200 people are killed each year when backed over by motor vehicles. The CT6 Premium Luxury/Platinum/Sport has standard Reverse Automatic Braking that uses rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The S-Class doesn’t offer backup collision prevention brakes.

Both the CT6 and the S-Class have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available crash mitigating brakes, night vision systems, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

Cadillac’s powertrain warranty covers the CT6 2 years and 20,000 miles longer than Mercedes covers the S-Class. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the S-Class ends after only 4 years or 50,000 miles.

The CT6’s corrosion warranty is 1 year longer than the S-Class’ (6 vs. 5 years).

Cadillac pays for the first scheduled maintenance on the CT6. Cadillac will pay for an oil change, lubrication and any other required maintenance. Mercedes doesn’t pay scheduled maintenance for the S-Class.

There are over 2 times as many Cadillac dealers as there are Mercedes dealers, which makes it much easier should you ever need service under the CT6’s warranty.

Reliability

J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Cadillac vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Cadillac 12th in initial quality, above the industry average. With 2 more problems per 100 vehicles, Mercedes is ranked 14th.

Fuel Economy and Range

On the EPA test cycle the CT6 gets better fuel mileage than the S-Class:

 

 

 

MPG

CT6

 

RWD

2.0 turbo 4 cyl.

24 city/34 hwy

S-Class

 

RWD

450 3.0 turbo V6

19 city/28 hwy

 

 

S 560 4.0 turbo V8

17 city/27 hwy

 

 

AMG 65 6.0 turbo V12

13 city/22 hwy

The CT6 has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The S-Class doesn’t offer a cap-less fueling system.

Transmission

A 10-speed automatic is standard on the Cadillac CT6, for better acceleration and lower engine speed on the highway. Only a nine-speed automatic is available for the S-Class.

Brakes and Stopping

The CT6 stops much shorter than the S-Class:

 

CT6

S-Class

 

70 to 0 MPH

152 feet

190 feet

Car and Driver

60 to 0 MPH

106 feet

119 feet

Motor Trend

Tires and Wheels

The CT6 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 S-Class; 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 S-Class don’t even offer run-flats.

Suspension and Handling

The CT6 AWD handles at .86 G’s, while the S-Class pulls only .81 G’s of cornering force in a Car and Driver skidpad test.

The CT6 AWD executes Motor Trend’s “Figure Eight” maneuver 1.1 seconds quicker than the S 560 (25.4 seconds @ .75 average G’s vs. 26.5 seconds @ .7 average G’s).

Chassis

The Cadillac CT6 may be more efficient, handle and accelerate better because it weighs about 600 to 850 pounds less than the Mercedes S-Class.

The front grille of the CT6 uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The S-Class doesn’t offer active grille shutters.

The CT6 uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The S-Class doesn’t offer active noise cancellation.

As tested by Car and Driver while under full throttle, the interior of the CT6 is quieter than the S 560 (72 vs. 75 dB).

Passenger Space

The CT6 has 9.2 cubic feet more passenger volume than the S-Class (121.2 vs. 112).

The CT6 has .5 inches more front headroom, 5 inches more front legroom, .6 inches more rear headroom and 6.3 inches more rear legroom than the S-Class.

Towing

The CT6 has a 1000 lbs. towing capacity. The S-Class has no towing capacity.

Servicing Ease

J.D. Power and Associates surveys of service recipients show that Cadillac service is better than Mercedes. J.D. Power ranks Cadillac third in service department satisfaction. With a 3% lower rating, Mercedes is ranked 6th.

Ergonomics

The CT6’s instruments include an oil pressure gauge and a temperature gauge – which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The S-Class does not have an oil pressure gauge.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the CT6 has standard extendable sun visors. The S-Class doesn’t offer extendable visors.

Economic Advantages

According to The Car Book by Jack Gillis, the CT6 is less expensive to operate than the S-Class because typical repairs cost much less on the CT6 than the S-Class, including $292 less for a water pump, $675 less for a muffler, $34 less for a starter, $396 less for front struts and $589 less for a power steering pump.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Cadillac CT6 will be $36260 to $77523 less than for the Mercedes S-Class.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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