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For enhanced safety, the front seat shoulder belts of the Kia Stinger 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.
The Stinger has standard Active Headrests, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Active Headrests system moves the headrests forward to prevent neck and spine injuries. The AMG A-Class doesn’t offer a whiplash protection system.
To help make backing safer, the Stinger’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 AMG A-Class doesn’t offer a cross-path warning system.
Both the Stinger and the AMG A-Class 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, around view monitors and driver alert monitors.
For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, with its optional vehicle-to-vehicle front crash prevention system, with its optional vehicle-to-pedestrian front crash prevention system, and its available headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the Stinger the rating of “Top Pick” for 2020, a rating granted to only 30 vehicles tested by the IIHS. The AMG A-Class has not been tested, yet.
The Stinger comes with a full 5-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 1 year and 10,000 miles sooner.
Kia’s powertrain warranty covers the Stinger 6 years and 50,000 miles longer than Mercedes covers the AMG A-Class. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 10 years or 100,000 miles. Coverage on the AMG A-Class ends after only 4 years or 50,000 miles.
There are almost 2 times as many Kia dealers as there are Mercedes dealers, which makes it much easier should you ever need service under the Stinger’s warranty.
The battery on the Stinger is in the trunk, which protects it from hot underhood temperatures that can degrade battery life. By keeping the Stinger’s battery 20 to 30 degrees cooler, its life is increased by years. The AMG A-Class’ battery is in the hot engine compartment.
J.D. Power and Associates rated the Stinger third among compact premium cars in their 2019 Initial Quality Study. The AMG A-Class isn’t in the top three in its category.
J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Kia vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Kia second in initial quality, above the industry average. With 24 more problems per 100 vehicles, Mercedes is ranked 12th, below the industry average.
J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Kia vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Kia 10th in reliability, above the industry average. With 8 more problems per 100 vehicles, Mercedes is ranked 13th.
From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Kia vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Kia 12 places higher in reliability than Mercedes.
The Stinger GT’s standard 3.3 turbo V6 produces 63 more horsepower (365 vs. 302) and 81 lbs.-ft. more torque (376 vs. 295) than the AMG A-Class’ 2.0 turbo 4-cylinder.
To lower fuel costs and make buying fuel easier, the Kia Stinger uses regular unleaded gasoline (premium recommended for maximum performance). The AMG A-Class requires premium, which can cost 20 to 55 cents more per gallon.
The Stinger has 2.4 gallons more fuel capacity than the AMG A-Class (15.9 vs. 13.5 gallons), for longer range between fill-ups.
An eight-speed automatic is standard on the Kia Stinger, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the AMG A-Class.
The Stinger 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 AMG 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. Some tire options on the AMG A-Class don’t have a run-flat feature, either.
For a smoother ride and more stable handling, the Stinger’s wheelbase is 7 inches longer than on the AMG A-Class (114.4 inches vs. 107.4 inches).
For better handling and stability, the average track (width between the wheels) on the Stinger is .9 inches wider in the front and 2.5 inches wider in the rear than the track on the AMG A-Class.
Because it has more passenger and cargo room, the EPA rates the Stinger a Mid-size car, while the AMG A-Class is rated a Compact.
The Stinger has .8 inches more front legroom, 1.3 inches more front shoulder room, 2.5 inches more rear legroom and .8 inches more rear shoulder room than the AMG A-Class.
To make loading and unloading groceries and cargo easier, especially for short adults, the Stinger GT2 has a standard power trunk, which opens and closes automatically by pressing a button or just by waiting momentarily behind the back bumper, completely leaving your hands free. The AMG A-Class doesn’t offer a power trunk.
The engine in the Stinger 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.
To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the Stinger has standard extendable sun visors. The AMG A-Class doesn’t offer extendable visors.
The Stinger has standard heated front seats. Heated front seats cost extra on the AMG A-Class. The Stinger GT2 also has standard heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the AMG A-Class.
To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Kia Stinger has a standard wireless phone charging system (Qi) in the center console. Wireless charging costs extra on the AMG A-Class.
The Stinger is available in both rear-wheel drive and all-wheel drive configurations. The AMG A-Class doesn’t offer a two-wheel drive configuration.
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