2020 Infiniti Q50 vs. 2020 Mercedes AMG A-Class

Detailed Review, Specifications & Comparison

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Safety

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For enhanced safety, the front seat shoulder belts of the Infiniti Q50 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 AMG A-Class doesn’t offer height-adjustable seat belts.

Over 200 people are killed each year when backed over by motor vehicles. The Q50 (except Pure) offers optional Back-up Collision Intervention that uses rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The AMG A-Class doesn’t offer backup collision prevention brakes.

To help make backing safer, the Q50 (except Pure)’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 AMG A-Class doesn’t offer a cross-path warning system.

Both the Q50 and the AMG A-Class have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available all-wheel drive, lane departure warning systems, blind spot warning systems and around view monitors.

Warranty

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The Q50 comes with a full 4-year/60,000-mile basic warranty, which covers the entire car and includes 24-hour roadside assistance. The AMG A-Class’ 4-year/50,000-mile basic warranty expires 10,000 miles sooner.

Infiniti’s powertrain warranty covers the Q50 2 years and 20,000 miles longer than Mercedes covers the AMG A-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 AMG A-Class ends after only 4 years or 50,000 miles.

The Q50’s corrosion warranty is 2 years longer than the AMG A-Class’ (7 vs. 5 years).

Reliability

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J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Infiniti vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Infiniti 11th in reliability, above the industry average. With 6 more problems per 100 vehicles, Mercedes is ranked 13th.

From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Infiniti vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Infiniti 8 places higher in reliability than Mercedes.

Engine

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The Q50 Red Sport 400’s standard 3.0 turbo V6 produces 98 more horsepower (400 vs. 302) and 55 lbs.-ft. more torque (350 vs. 295) than the AMG A-Class’ 2.0 turbo 4-cylinder.

Fuel Economy and Range

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The Q50 has 6.5 gallons more fuel capacity than the AMG A-Class (20 vs. 13.5 gallons), for longer range between fill-ups.

Brakes and Stopping

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For better stopping power the Q50 Sport/Red Sport 400’s front brake rotors are larger than those on the AMG A-Class:

Q50 Sport/Red Sport 400

AMG A-Class

Front Rotors

14 inches

13.8 inches

Rear Rotors

13.8 inches

13 inches

Tires and Wheels

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For better traction, the Q50 Red Sport 400’s tires are larger than the largest tires available on the AMG A-Class (F:245/40R19 & R:265/35R19 vs. 235/40R18).

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the Q50 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 AMG A-Class.

Suspension and Handling

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For a smoother ride and more stable handling, the Q50’s wheelbase is 4.8 inches longer than on the AMG A-Class (112.2 inches vs. 107.4 inches).

Passenger Space

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Because it has more passenger and cargo room, the EPA rates the Q50 a Mid-size car, while the AMG A-Class is rated a Compact.

The Q50 has 8.5 cubic feet more passenger volume than the AMG A-Class (101.5 vs. 93).

The Q50 has 2.7 inches more front legroom, 1.6 inches more front shoulder room, .3 inches more rear headroom, 1.2 inches more rear legroom and 2.1 inches more rear shoulder room than the AMG A-Class.

Cargo Capacity

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The Q50 has a much larger trunk than the AMG A-Class (13.5 vs. 8.6 cubic feet).

With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the Q50 offers cargo security. The AMG A-Class’ non-lockable remote release defeats cargo security.

Servicing Ease

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The engine in the Q50 is mounted longitudinally (North-South), instead of sideways, as in the AMG A-Class. This makes it easier to service and maintain, because the accessory belts are in front.

J.D. Power and Associates surveys of service recipients show that Infiniti service is better than Mercedes. J.D. Power ranks Infiniti fourth in service department satisfaction. With an 8% lower rating, Mercedes is ranked fifth.

Ergonomics

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To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the Q50 has standard extendable sun visors. The AMG A-Class doesn’t offer extendable visors.

Model Availability

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The Q50 is available in both rear-wheel drive and all-wheel drive configurations. The AMG A-Class doesn’t offer a two-wheel drive configuration.

Recommendations

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/07/06

The Infiniti Q50 outsold the Mercedes A-Class by 47% during 2019.

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