Compare the2023 Mercedes GLC CoupeVS 2023 Infiniti QX55

Safety
Warranty
Reliability
Fuel Economy and Range
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Chassis
Passenger Space
Towing
Servicing Ease
Ergonomics
Recommendations

Safety

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The GLC Coupe’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The QX55 doesn’t offer pre-crash pretensioners.

The GLC Coupe has standard NECK-PRO front head restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the NECK-PRO front head restraints system moves the headrests forward to prevent neck and spine injuries. The QX55 doesn’t offer a whiplash protection system.

The GLC Coupe offers an optional Post Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The QX55 doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

Both the GLC Coupe and QX55 have rear cross-traffic warning, but the GLC Coupe has Active Brake Assist (automatically applies the brakes) to better prevent a collision when backing near traffic. The QX55’s Rear Cross Traffic Alert doesn’t automatically brake.

The GLC Coupe’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 QX55 doesn’t offer a driver alert monitor.

Both the GLC Coupe and the QX55 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, blind spot warning systems, rearview cameras, rear cross-path warning and available lane departure warning systems.

Warranty

There are over 89 percent more Mercedes dealers than there are Infiniti dealers, which makes it much easier should you ever need service under the GLC Coupe’s warranty.

Reliability

To reliably power the ignition and other systems and to recharge the battery, the GLC Coupe has a standard 150-amp alternator. The QX55’s 130-amp alternator isn’t as powerful.

J.D. Power and Associates’ 2022 Initial Quality Study of new car owners surveyed provide the statistics that show that Mercedes vehicles are better in initial quality than Infiniti vehicles. With 15 fewer problems per 100 vehicles, JD Power ranks Mercedes higher than Infiniti.

J.D. Power and Associates’ 2022 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Mercedes vehicles are more reliable than Infiniti With 33 fewer problems per 100 vehicles in the first three years of ownership, J.D. Power ranks Mercedes higher than Infiniti.

Fuel Economy and Range

In heavy traffic or at stoplights the GLC Coupe’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. If the conditions warrant or the driver wishes, the system can be manually disabled at any time for the duration of a trip. The QX55 doesn’t offer an automatic engine start/stop system.

The GLC Coupe has 1.4 gallons more fuel capacity than the QX55 (17.4 vs. 16 gallons), for longer range between fill-ups.

Brakes and Stopping

For better stopping power the GLC Coupe’s brake rotors are larger than those on the QX55:

	GLC Coupe	QX55
Front Rotors	13.5 inches	13 inches
Rear Rotors	12.6 inches	12.1 inches

Tires and Wheels

The GLC Coupe’s optional 285/40R20 rear tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the QX55’s 45 series tires.

The GLC Coupe offers an optional 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 QX55; 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.

Suspension and Handling

The GLC Coupe has standard front and rear gas-charged shocks for better control over choppy roads. The QX55’s suspension doesn’t offer gas-charged shocks.

The GLC Coupe’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 QX55 doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the GLC Coupe’s wheelbase is 2.9 inches longer than on the QX55 (113.1 inches vs. 110.2 inches).

Chassis

The GLC Coupe is 3 inches shorter than the QX55, making the GLC Coupe easier to handle, maneuver and park in tight spaces.

The design of the Mercedes GLC Coupe amounts to more than styling. The GLC Coupe has an aerodynamic coefficient of drag of .33 Cd. That is lower than the QX55 (.35) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the GLC Coupe get better fuel mileage.

Passenger Space

The GLC Coupe has 1.2 inches more front legroom and 1.4 inches more rear headroom than the QX55.

Towing

The GLC Coupe has a 3500 lbs. towing capacity. The QX55 has no towing capacity.

Optional Trailer Stability Assist on the GLC Coupe uses the Electronic Stability Program sensors to detect trailer sway, then uses individual brakes to counteract any swaying and help keep the tow vehicle and trailer steady. The QX55 doesn’t offer electronic trailer sway control.

Servicing Ease

The engine in the GLC Coupe is mounted longitudinally (North-South), instead of sideways, as in the QX55. This makes it easier to service and maintain, because the accessory belts are in front.

Ergonomics

Unlike the driver-only memory system in the QX55 Essential/Sensory, the GLC Coupe 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 power windows standard on both the GLC Coupe and the QX55 have locks to prevent small children from operating them. When the lock on the GLC Coupe is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The QX55 prevents the driver from operating the other windows just as it does the other passengers.

The GLC Coupe’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 QX55’s standard intermittent wipers change speed with vehicle speed, but can’t turn on and off or change speed based on changing rainfall.

Heated windshield washer nozzles are standard on the GLC Coupe to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The QX55 doesn’t offer heated windshield washer nozzles.

Manual rear side window sunshades are available in the GLC Coupe to help block heat and glare for the rear passengers. The QX55 doesn’t offer rear side window sunshades.

The GLC Coupe’s standard rear and side view mirrors have an automatic dimming feature. These mirrors can be set to automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The QX55 has an automatic rear view mirror, but its side mirrors don’t dim.

Both the GLC Coupe and the QX55 have standard heated front seats. The GLC Coupe also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the QX55.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes GLC offers an optional wireless phone charging system (Qi) in the center console. The QX55 doesn’t offer wireless personal charging.

The GLC Coupe offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The QX55 doesn’t offer a house-current electrical outlet.

The GLC Coupe’s Active Parking Assist can parallel park or back into a parking spot by itself, starting and stopping automatically, with the driver only responsible for switching from reverse to drive. The QX55 doesn’t offer an automated parking system.

Recommendations

Motor Trend selected the GLC Coupe as their 2017 Sport Utility of the Year. The QX55 has never been chosen.

The Mercedes GLC outsold the Infiniti QX55 by almost 13 to one during 2022.