2019 Genesis G70 vs. 2019 Mercedes C-Class Sedan

Detailed Review, Specifications & Comparison

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Safety

Both the G70 and the C-Class Sedan have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, driver alert monitors, available all wheel drive and around view 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, its standard front crash prevention system, and its headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the G70 its highest rating: “Top Pick Plus” for 2019, a rating granted to only 36 vehicles tested by the IIHS. The C-Class Sedan was last qualified as only a standard “Top Pick” in 2017.

Warranty

The G70 comes with a full 5-year/60,000-mile basic warranty, which covers the entire car and includes free 24-hour roadside assistance. The C-Class Sedan’s 4-year/50,000-mile basic warranty expires 1 year and 10,000 miles sooner.

Genesis’ powertrain warranty covers the G70 6 years and 50,000 miles longer than Mercedes covers the C-Class Sedan. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 10 years or 100,000 miles. Coverage on the C-Class Sedan ends after only 4 years or 50,000 miles.

The G70’s corrosion warranty is 2 years longer than the C-Class Sedan’s (7 vs. 5 years).

Genesis pays for scheduled maintenance on the G70 for 3 years and 36,000 miles. Genesis will pay for oil changes, lubrication and any other required maintenance. Mercedes doesn’t pay scheduled maintenance for the C-Class Sedan.

Reliability

The battery on the G70 is in the trunk, which protects it from hot underhood temperatures that can degrade battery life. By keeping the G70’s battery 20 to 30 degrees cooler, its life is increased by years. The C-Class Sedan’s battery is in the hot engine compartment.

J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Genesis vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Genesis first in initial quality, above the industry average. With 24 more problems per 100 vehicles, Mercedes is ranked 14th.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Genesis vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Genesis 5 places higher in reliability than Mercedes.

Fuel Economy and Range

To lower fuel costs and make buying fuel easier, the Genesis G70 uses regular unleaded gasoline (premium recommended for maximum performance). The C-Class Sedan requires premium, which can cost 20 to 55 cents more per gallon.

Transmission

The G70 offers a manual transmission for better acceleration, control and fuel economy. The C-Class Sedan doesn’t offer a manual transmission.

The G70’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The C-Class Sedan doesn’t offer launch control.

Tires and Wheels

The G70’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 C-Class Sedan’s standard 50 series tires.

For better ride, handling and brake cooling the G70 has standard 18-inch wheels. Smaller 17-inch wheels are standard on the C-Class Sedan.

The G70 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 C-Class Sedan; 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 models of the C-Class Sedan don’t even offer run-flats.

Suspension and Handling

The G70 Advanced handles at .90 G’s, while the C 300 Sedan 4MATIC pulls only .87 G’s of cornering force in a Motor Trend skidpad test.

The G70 Advanced executes Motor Trend’s “Figure Eight” maneuver 1.1 seconds quicker than the C 300 Sedan 4MATIC (25.2 seconds @ .75 average G’s vs. 26.3 seconds @ .7 average G’s).

For better maneuverability, the G70’s turning circle is .7 feet tighter than the C-Class Sedan’s (36.1 feet vs. 36.8 feet). The G70 AWD’s turning circle is 1.3 feet tighter than the AMG C 43 Sedan’s (37.4 feet vs. 38.7 feet).

Chassis

The design of the Genesis G70 amounts to more than styling. The G70 has an aerodynamic coefficient of drag of .28 Cd. That is lower than the C-Class Sedan (.3 to .32) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the G70 get better fuel mileage.

Passenger Space

The G70 has 3.8 cubic feet more passenger volume than the C-Class Sedan (93.8 vs. 90).

The G70 has 2.6 inches more front headroom, .9 inches more front legroom and 1 inch more front shoulder room than the C-Class Sedan.

Ergonomics

The Insurance Institute for Highway Safety (IIHS) conducts detailed tests on headlights for their range both straight ahead and in curves and to be certain they don’t exceed acceptable amounts of glare to oncoming drivers. The G70’s headlights were rated “Good” by the IIHS, while the C-Class Sedan’s headlights are rated “Poor.”

Both the G70 and the C-Class Sedan offer available heated front seats. The G70 Prestige/Dynamic/Sport also has standard heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the C-Class Sedan.

Recommendations

The G70 was chosen as one of Car and Driver’s “Top Ten” in 2019. The C-Class Sedan has never been a Car and Driver “Top Ten” pick.

Motor Trend selected the G70 as their 2019 Car of the Year. The C-Class Sedan has never been chosen.

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

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