2019 Cadillac ATS Coupe vs. 2019 Mercedes E-Class Coupe

Detailed Review, Specifications & Comparison

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For enhanced safety, the Cadillac ATS Coupe’s rear seat shoulder belts have child comfort guides to move the belt to properly fit children. A better fit can prevent injuries and the increased comfort also encourages children to buckle up. The Mercedes E-Class Coupe doesn’t offer comfort guides on its rear seat belts.

Over 200 people are killed each year when backed over by motor vehicles. The ATS Coupe V6 offers optional Rear Automatic Braking which use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The E-Class Coupe doesn’t offer backup collision prevention brakes.

Both the ATS Coupe and the E-Class Coupe have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available all wheel drive, crash mitigating brakes, lane departure warning systems, blind spot warning systems, rear parking sensors and rear cross-path warning.


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

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

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

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 ATS Coupe’s warranty.


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

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

To lower fuel costs and make buying fuel easier, the Cadillac ATS Coupe uses regular unleaded gasoline (premium recommended with the 2.0 turbo 4 cyl. engine for maximum performance). The E-Class Coupe requires premium, which can cost 20 to 55 cents more per gallon.

Tires and Wheels

For better traction and acceleration, the ATS Coupe has larger rear tires than the E-Class Coupe (255/35R18 vs. 245/45R18).

The ATS Coupe’s 225/40R18 front and 255/35R18 rear tires provide better handling because they have a lower 40 series front and 35 series rear profile (height to width ratio) that provides a stiffer sidewall than the E-Class Coupe 4MATIC’s standard 45 series tires.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the ATS Coupe can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. Run-flat tires aren’t available on some tire packages on the E-Class Coupe.

Suspension and Handling

The ATS Coupe’s front to rear weight distribution is more even (51% to 49%) than the E-Class Coupe’s (55.5% to 44.5%). This gives the ATS Coupe more stable handling and braking.

The ATS Coupe handles at .91 G’s, while the E 450 Coupe pulls only .85 G’s of cornering force in a Motor Trend skidpad test.

The ATS Coupe executes Motor Trend’s “Figure Eight” maneuver quicker than the E 450 Coupe (25.6 seconds @ .71 average G’s vs. 26 seconds @ .71 average G’s).

For better maneuverability, the ATS Coupe FE3’s turning circle is 1.5 feet tighter than the E-Class Coupe’s (36 feet vs. 37.5 feet).


The Cadillac ATS Coupe may be more efficient, handle and accelerate better because it weighs about 500 to 650 pounds less than the Mercedes E-Class Coupe.

The ATS Coupe is 6.4 inches shorter than the E-Class Coupe, making the ATS Coupe easier to handle, maneuver and park in tight spaces.

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

Passenger Space

The ATS Coupe has .5 inches more front legroom and .8 inches more rear shoulder room than the E-Class Coupe.

Cargo Capacity

The ATS Coupe has a larger trunk than the E-Class Coupe (10.4 vs. 10 cubic feet).

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.

Economic Advantages

According to The Car Book by Jack Gillis, the ATS Coupe is less expensive to operate than the E-Class Coupe because typical repairs cost much less on the ATS Coupe than the E-Class Coupe, including $33 less for a water pump, $140 less for a starter, $490 less for a timing belt/chain and $152 less for a power steering pump.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Cadillac ATS Coupe will be $5429 to $18893 less than for the Mercedes E-Class Coupe.


A group of representative automotive journalists from North America selected the ATS as the 2013 North American Car of the Year. The E-Class has never been chosen.

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

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