Kemna Automotive Group Compares 2017 Cadillac CT6 VS 2017 Mercedes S-Class In IA

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2017 Cadillac CT6

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2017 Cadillac CT6

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2017 Mercedes S-Class

Safety Comparison

Over 200 people are killed each year when backed over by motor vehicles. The CT6 (except Base/Luxury) offers optional Rear Automatic Braking which use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The S-Class doesn’t offer backup collision prevention brakes.

To help make backing safer, the CT6’s optional cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The S-Class doesn’t offer a cross-path warning system.

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 and around view monitors.

Warranty Comparison

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 scheduled maintenance on the CT6 for 3 years and 36,000 miles. Cadillac will pay for oil changes, 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.

Fuel Economy and Range Comparison

On the EPA test cycle the CT6 AWD turbo V6 gets better city fuel mileage than the S550 4MATIC (18 city/26 hwy vs. 16 city/26 hwy).

An engine control system that can shut down half of the engine’s cylinders helps improve the CT6 V6’s fuel efficiency. The S-Class doesn’t offer a system that can shut down part of the engine.

The CT6 has 2.6 gallons more fuel capacity than the S-Class 550e Hybrid’s standard fuel tank (19.2 vs. 16.6 gallons), for longer range between fill-ups.

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.

Brakes and Stopping Comparison

The CT6 stops much shorter than the S-Class:





70 to 0 MPH

152 feet

190 feet

Car and Driver

60 to 0 MPH

106 feet

119 feet

Motor Trend

Suspension and Handling Comparison

The CT6 AWD handles at .86 G’s, while the S550e 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 S550 (25.4 seconds @ .75 average G’s vs. 26.5 seconds @ .7 average G’s).

Chassis Comparison

The Cadillac CT6 may be more efficient, handle and accelerate better because it weighs about 900 to 1000 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 offers available 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 S550 (72 vs. 75 dB).

Passenger Space Comparison

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

The CT6 has .4 inches more front headroom, 1 inch more front legroom and .6 inches more rear headroom than the S-Class.

Ergonomics Comparison

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.

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