2019 Mazda 6 vs. 2019 Mercedes A-Class

Detailed Review, Specifications & Comparison

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Safety

For enhanced safety, the front seat shoulder belts of the Mazda 6 are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Mercedes A-Class doesn’t offer height-adjustable seat belts.

To help make backing safer, the Mazda 6’s 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 A-Class doesn’t offer a cross-path warning system.

Both the Mazda 6 and the A-Class have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, front wheel drive, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras and available around view monitors.

For its top level performance in IIHS driver-side small overlap frontal, moderate overlap frontal, side impact, rear impact and roof-crush tests, with its optional front crash prevention system, its “Good” rating in the new passenger-side small overlap crash test, and its available headlight’s “Acceptable” rating, the Insurance Institute for Highway Safety grants the Mazda 6 the rating of “Top Pick” for 2019, a rating granted to only 62 vehicles tested by the IIHS. The A-Class has not been tested, yet.

Warranty

Mazda’s powertrain warranty covers the 6 1 year and 10,000 miles longer than Mercedes covers the A-Class. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 5 years or 60,000 miles. Coverage on the A-Class ends after only 4 years or 50,000 miles.

There are over 52 percent more Mazda dealers than there are Mercedes dealers, which makes it much easier should you ever need service under the 6’s warranty.

Reliability

J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Mazda vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Mazda 14th in reliability. With 3 more problems per 100 vehicles, Mercedes is ranked 15th.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Mazda vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Mazda third in reliability. Mercedes is ranked 17th.

Engine

The Mazda 6 Grand Touring/Signature’s standard 2.5 turbo 4 cyl. produces 62 more horsepower (250 vs. 188) and 89 lbs.-ft. more torque (310 vs. 221) than the A-Class’ 2.0 turbo 4 cyl.

Fuel Economy and Range

An engine control system that can shut down half of the engine’s cylinders helps improve the Mazda 6 (except Turbo)’s fuel efficiency. The A-Class doesn’t offer a system that can shut down part of the engine.

The Mazda 6 has 2.9 gallons more fuel capacity than the A-Class (16.4 vs. 13.5 gallons), for longer range between fill-ups.

Tires and Wheels

For better traction, the Mazda 6 has larger tires than the A-Class (225/55R17 vs. 205/55R17).

The Mazda 6 Touring/Grand Touring/Signature’s tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the A-Class’ 55 series tires.

The Mazda 6 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 A-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.

Suspension and Handling

For a smoother ride and more stable handling, the Mazda 6’s wheelbase is 4 inches longer than on the A-Class (111.4 inches vs. 107.4 inches).

For better handling and stability, the average track (width between the wheels) on the Mazda 6 is .9 inches wider in the front and 1.3 inches wider in the rear than the track on the A-Class.

Chassis

The Mazda 6 (except Sport) offers available computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The A-Class doesn’t offer active noise cancellation.

Passenger Space

Because it has more passenger and cargo room, the EPA rates the Mazda 6 a Mid-size car, while the A-Class is rated a Compact.

The Mazda 6 has 6.7 cubic feet more passenger volume than the A-Class (99.7 vs. 93).

The Mazda 6 has .4 inches more front legroom, .8 inches more front shoulder room, 4.8 inches more rear legroom and 1.1 inches more rear shoulder room than the A-Class.

Cargo Capacity

The Mazda 6 has a much larger trunk than the A-Class (14.7 vs. 8.6 cubic feet).

Ergonomics

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the Mazda 6 has standard extendable sun visors. The A-Class doesn’t offer extendable visors.

Both the Mazda 6 and the A-Class offer available heated front seats. The Mazda 6 Grand Touring Reserve/Signature also has standard heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the A-Class.

Recommendations

Consumer Reports® recommends the Mazda 6, based on reliability, safety and performance.

The Mazda 6 was chosen as one of Car and Driver’s “Top Ten” for 2 of the last 6 years. The A-Class has never been a Car and Driver “Top Ten” pick.

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

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