2019 Acura ILX vs. 2019 Mercedes C-Class Sedan

Detailed Review, Specifications & Comparison

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Using vehicle speed sensors, smart airbags in the ILX deploy with different levels of force or don’t deploy at all to help better protect passengers of all sizes in different collisions. The ILX’s side airbags will shut off if a child is leaning against the door. The C-Class Sedan’s airbags don’t have smart features and will always deploy full force.

The ILX has standard Active Head Restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Active Head Restraints system moves the headrests forward to prevent neck and spine injuries. The C-Class Sedan doesn’t offer a whiplash protection system.

Both the ILX and the C-Class Sedan have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available blind spot warning systems and rear cross-path warning.

The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Acura ILX is safer than the Mercedes C-Class Sedan:







5 Stars

5 Stars

Neck Compression

56 lbs.

62 lbs.

Leg Forces (l/r)

57/324 lbs.

421/449 lbs.




4 Stars

4 Stars




Chest Compression

.5 inches

.6 inches

Neck Injury Risk



Neck Compression

40 lbs.

219 lbs.

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

The National Highway Traffic Safety Administration does side impact tests on new vehicles. In this test, which crashes the vehicle into a flat barrier at 38.5 MPH, results indicate that the Acura ILX is safer than the Mercedes C-Class Sedan:





Front Seat


5 Stars

5 Stars

Chest Movement

.9 inches

1 inches

Abdominal Force

143 G’s

147 G’s


Rear Seat


5 Stars

4 Stars




Spine Acceleration

64 G’s

67 G’s

Hip Force

699 lbs.

949 lbs.

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.


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


A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the ILX’s reliability 21 points higher than the C-Class Sedan.

J.D. Power and Associates rated the ILX first among small premium cars in their 2018 Initial Quality Study. The C-Class Sedan isn’t in the top three in its category.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Acura vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Acura 4 places higher in reliability than Mercedes.

Fuel Economy and Range

On the EPA test cycle the ILX gets better fuel mileage than the C 300 Sedan RWD (24 city/34 hwy vs. 23 city/34 hwy).

To lower fuel costs and make buying fuel easier, the Acura ILX 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.


The ILX offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The C-Class Sedan doesn’t offer an SMG or a conventional manual transmission.

Tires and Wheels

The ILX’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.


The Acura ILX may be more efficient, handle and accelerate better because it weighs about 300 to 600 pounds less than the Mercedes C-Class Sedan.

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

Passenger Space

The ILX has .9 inches more front headroom, .6 inches more front legroom and .3 inches more front shoulder room than the C-Class Sedan.

Economic Advantages

According to The Car Book by Jack Gillis, the ILX is less expensive to operate than the C-Class Sedan because it costs $711 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the ILX than the C-Class Sedan, including $309 less for a water pump, $574 less for a muffler, $22 less for front brake pads, $305 less for a fuel pump, $74 less for front struts and $135 less for a power steering pump.

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

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