2019 Mercedes E-Class Sedan vs. 2019 Cadillac CT6

Detailed Review, Specifications & Comparison

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Safety

For enhanced safety, the front and rear seat shoulder belts of the Mercedes E-Class Sedan have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision. The Cadillac CT6 doesn’t offer pretensioners for the rear seat belts.

The rear seatbelts optional on the E-Class Sedan 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 E-Class Sedan’s 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 E-Class Sedan 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 all wheel drive, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

For its top level performance in IIHS driver-side small overlap frontal, moderate overlap frontal, side impact, rear impact and roof-crush tests, its standard front crash prevention system, its “Good” rating in the new passenger-side small overlap crash test, and its headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the E-Class Sedan its highest rating: “Top Pick Plus” for 2018, a rating granted to only 28 vehicles tested by the IIHS. The CT6 has not been tested, yet.

Reliability

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the E-Class Sedan’s reliability 50 points higher than the CT6.

J.D. Power and Associates’ 2018 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 15th in reliability. With 39 more problems per 100 vehicles, Cadillac is ranked 27th.

From surveys of all its subscribers, Consumer Reports’ April 2018 Auto Issue reports that Mercedes vehicles are more reliable than Cadillac vehicles. Consumer Reports ranks Mercedes 13 places higher in reliability than Cadillac.

Fuel Economy and Range

On the EPA test cycle the AMG E 53 Sedan gets better fuel mileage than the CT6 V6 AWD (21 city/28 hwy vs. 18 city/27 hwy).

On the EPA test cycle the E 450 4MATIC Sedan 4MATIC gets better fuel mileage than the CT6 AWD turbo V6 (20 city/28 hwy vs. 18 city/26 hwy).

Regenerative brakes improve the E-Class Sedan 53 AMG’s fuel efficiency by converting inertia back into energy instead of wasting it. The CT6 doesn’t offer a regenerative braking system.

The E-Class Sedan 450/AMG 53’s standard fuel tank has 1.6 gallons more fuel capacity than the CT6 (21.1 vs. 19.5 gallons).

Environmental Friendliness

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes E-Class Sedan higher (5 out of 10) than the Cadillac CT6 (3 to 5). This means the E-Class Sedan produces up to 16.5 pounds less smog-producing pollutants than the CT6 every 15,000 miles.

Brakes and Stopping

For better stopping power the E-Class Sedan’s front brake rotors are larger than those on the CT6:

 

E-Class

AMG E 53

CT6 2.0

CT6 AWD V6

Front Rotors

13.5 inches

14.6 inches

12.6 inches

13.6 inches

Rear Rotors

11.8 inches

14.2 inches

12.4 inches

12.4 inches

The E-Class Sedan stops much shorter than the CT6:

 

E-Class

CT6

 

70 to 0 MPH

154 feet

164 feet

Car and Driver

60 to 0 MPH

106 feet

117 feet

Motor Trend

Tires and Wheels

For better traction, the E-Class Sedan has larger standard tires than the CT6 (245/45R18 vs. 235/50R18).

The E-Class Sedan’s 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 E-Class Sedan’s optional 275/35R19 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 E-Class Sedan 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

The E-Class Sedan has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The E-Class Sedan’s height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The CT6 doesn’t offer a load leveling suspension.

The E-Class Sedan 4MATIC handles at .92 G’s, while the CT6 pulls only .81 G’s of cornering force in a Car and Driver skidpad test.

The E-Class Sedan 4MATIC executes Motor Trend’s “Figure Eight” maneuver 1.6 seconds quicker than the CT6 (25.1 seconds @ .77 average G’s vs. 26.7 seconds @ .66 average G’s).

For better maneuverability, the E-Class Sedan’s turning circle is 1.8 feet tighter than the CT6’s (38.2 feet vs. 40 feet). The E 450 4MATIC Sedan’s turning circle is 1 foot tighter than the CT6’s (39 feet vs. 40 feet).

Chassis

The E-Class Sedan is 12 inches shorter than the CT6, making the E-Class Sedan easier to handle, maneuver and park in tight spaces.

As tested by Car and Driver, the interior of the E 300 Sedan 4MATIC is quieter than the CT6 AWD:

 

E-Class Sedan

CT6

At idle

38 dB

49 dB

Passenger Space

The E-Class Sedan has .2 inches more rear headroom and .9 inches more rear shoulder room than the CT6.

Cargo Capacity

A low lift-over trunk design makes loading and unloading the E-Class Sedan easier. The E-Class Sedan’s trunk lift-over height is 27.7 inches, while the CT6’s liftover is 29.1 inches.

The E-Class Sedan’s standard rear seats fold to accommodate long and bulky cargo. The CT6 doesn’t offer folding rear seats, only a ski pass-through.

A standard locking glovebox (which can’t be accessed with the valet key) keeps your small valuables safer in the E-Class Sedan. The CT6 doesn’t offer locking storage for small valuables.

Ergonomics

Heated windshield washer fluid is standard on the E-Class Sedan 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 Premium Luxury/Platinum/Sport’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The E-Class Sedan’s optional 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 E-Class Sedan has standard dual-element sun visors that can block glare from two directions simultaneously. The CT6 doesn’t offer secondary sun visors.

Model Availability

The Mercedes E-Class comes in coupe, convertible, sedan and station wagon bodystyles; the Cadillac CT6 isn’t available as a coupe, convertible or station wagon.

Economic Advantages

Insurance will cost less for the E-Class Sedan owner. The Complete Car Cost Guide estimates that insurance for the E-Class Sedan will cost $770 less than the CT6 over a five-year period.

The E-Class Sedan will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the E-Class Sedan will retain 38.57% to 39.14% of its original price after five years, while the CT6 only retains -5.72% to 36.79%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Mercedes E-Class Sedan will be $1897 to $12015 less than for the Cadillac CT6.

Recommendations

Consumer Reports® recommends the Mercedes E-Class Sedan, based on reliability, safety and performance.

Motor Trend performed a comparison test in its February 2017 issue and they ranked the Mercedes E 300 Sedan higher than the Cadillac CT6.

The E-Class was chosen as one of Car and Driver’s “Top Ten” in 2018. The CT6 has never been a Car and Driver “Top Ten” pick.

The Mercedes E-Class outsold the Cadillac CT6 by almost five to one during the 2018 model year.

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

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