For enhanced safety, the front and rear seat shoulder belts of the Mercedes C-Class Sedan have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision. The Acura ILX doesn’t offer pretensioners for the rear seat belts.
The C-Class Sedan’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The ILX doesn’t offer pre-crash pretensioners.
The C-Class Sedan offers all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The ILX doesn’t offer all-wheel drive.
The C-Class Sedan’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The ILX doesn’t offer a driver alert monitor.
Both the C-Class Sedan and the ILX have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, height-adjustable front shoulder belts, four-wheel antilock brakes, traction control and electronic stability systems to prevent skidding.
The Mercedes C-Class Sedan weighs 457 to 501 pounds more than the Acura ILX. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts. Lighter cars are also affected more by crosswinds.
There are over 14 percent more Mercedes dealers than there are Acura dealers, which makes it easier should you ever need service under the C-Class Sedan’s warranty.
J.D. Power and Associates’ 2014 Initial Quality Study of new car owners surveyed provide the statistics that show that Mercedes vehicles are better in initial quality than Acura vehicles. J.D. Power ranks Mercedes 13th in initial quality, above the industry average. With 16 more problems per 100 vehicles, Acura is ranked 25th, below the industry average.
J.D. Power and Associates’ 2015 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Mercedes vehicles are more reliable than Acura vehicles. J.D. Power ranks Mercedes 7th in reliability, above the industry average. With 5 more problems per 100 vehicles, Acura is ranked 11th.
The C300 Sedan’s standard 2.0 turbo 4 cyl. produces 40 more horsepower (241 vs. 201) and 93 lbs.-ft. more torque (273 vs. 180) than the ILX’s 2.4 DOHC 4 cyl. The C400 Sedan’s standard 3.0 turbo V6 produces 128 more horsepower (329 vs. 201) and 174 lbs.-ft. more torque (354 vs. 180) than the ILX’s 2.4 DOHC 4 cyl.
In heavy traffic or at stoplights the C-Class Sedan’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The ILX doesn’t offer an automatic engine start/stop system.
The C-Class Sedan has 4.8 gallons more fuel capacity than the ILX (18 vs. 13.2 gallons), for longer range between fill-ups.
For better traction, the C-Class Sedan has larger standard tires than the ILX (225/50R17 vs. 215/45R17).
The C-Class Sedan’s optional 245/35R19 rear tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the ILX A-SPEC’s 40 series tires.
For better ride, handling and brake cooling the C-Class Sedan offers optional 19-inch wheels. The ILX’s largest wheels are only 18-inches.
Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the C-Class Sedan can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The ILX doesn’t offer run-flat tires.
The C-Class Sedan has a standard driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The ILX’s suspension doesn’t offer adjustable shock absorbers.
The C-Class Sedan has a standard automatic load leveling suspension to keep ride height level with a heavy load or when towing. The ILX doesn’t offer a load leveling suspension.
The C-Class Sedan’s drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The ILX doesn’t offer drift compensation steering.
For a smoother ride and more stable handling, the C-Class Sedan’s wheelbase is 6.7 inches longer than on the ILX (111.8 inches vs. 105.1 inches).
For better handling and stability, the track (width between the wheels) on the C-Class Sedan is 3.1 inches wider in the front than on the ILX.
The front grille of the C-Class Sedan uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The ILX doesn’t offer active grille shutters.
The C-Class Sedan has 1.2 inches more rear headroom and 1.2 inches more rear legroom than the ILX.
The C-Class Sedan has a larger trunk than the ILX (12.8 vs. 12.3 cubic feet).
To allow full utilization of available cargo room, the C-Class Sedan’s trunk lid uses concealed beam hinges that don’t intrude into the trunk. The ILX’s useful trunk space is reduced by its intrusive beam hinge.
The C-Class Sedan’s standard folding rear seats are split to accommodate bulky cargo. The ILX’s standard single piece folding rear seat is not as flexible; long cargo and a passenger can’t share the rear seat.
To make loading and unloading groceries and cargo easier, especially for short adults or children, the C-Class Sedan offers an optional power trunk, which opens and closes automatically by pressing a button, or optionally by just kicking your foot under the back bumper, completely leaving your hands free. The ILX doesn’t offer a power trunk.
Unlike the driver-only memory system optional at extra cost in the ILX, the C-Class Sedan offers an optional passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.
The C-Class Sedan’s standard easy entry system raises the steering wheel and glides the driver’s seat back, making it easier for the driver to get in and out. The ILX doesn’t offer an easy entry system.
The C-Class Sedan offers an optional heads-up display which projects speed and navigation instruction readouts onto the windshield, allowing drivers to view information without diverting their eyes from the road. The ILX doesn’t offer a heads-up display.
The power windows standard on both the C-Class Sedan and the ILX have locks to prevent small children from operating them. When the lock on the C-Class Sedan is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The ILX prevents the driver from operating the other windows just as it does the other passengers.
The C-Class Sedan’s front and rear power windows all open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The ILX’s rear power window switches have to be held the entire time to open or close them fully.
The C-Class Sedan’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The ILX’s intermittent wipers change speed with vehicle speed, but can’t turn on and off or change speed based on changing rainfall.
While driving with high beams on, sensitive light sensors available for the C-Class Sedan detect other vehicles which could be blinded and automatically switch to low beams. The ILX doesn’t offer automatic dimming high beams.
To help drivers see further while navigating curves, the C-Class Sedan offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The ILX doesn’t offer cornering lights.
A power rear sunshade is optional in the C-Class Sedan to help block heat and glare for the rear passengers. The ILX doesn’t offer a rear sunshade.
The C-Class Sedan has standard automatic dimming rear and side view mirrors which automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The ILX offers an automatic rear view mirror, but its side mirrors don’t dim.
The C-Class Sedan’s optional air conditioned front seats cool the driver and front passenger and help take the sting out of hot leather in Summer. The ILX doesn’t offer air conditioned front seats.
Both the C-Class Sedan and the ILX offer rear vents. For greater rear passenger comfort, the C-Class Sedan has standard rear air conditioning vents to keep rear occupants cool in summer or warm in winter. The ILX doesn’t offer rear air conditioning vents, only heat vents.
The C-Class Sedan’s optional Active Parking Assist can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The ILX doesn’t offer an automated parking system.
The C-Class Sedan will cost the buyer less in the long run because of its superior resale value. Kiplinger’s estimates that the C-Class Sedan will retain a greater percentage of its original price after three and five years than the ILX.
33% to 34%
48% to 50%
Both the Mercedes C-Class Sedan and Acura ILX won an award in Kiplinger’s 2015 car issue.
The C-Class Sedan was chosen as one of Automobile Magazine’s “All Stars” in 2015. The ILX has never been an “All Star.”
The Mercedes C-Class outsold the Acura ILX by over four to one during 2014.