Compare the2025 Mercedes GLC CoupeVS 2025 Infiniti QX55

Safety
Warranty
Reliability
Engine
Fuel Economy and Range
Environmental Friendliness
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Chassis
Passenger Space
Towing
Servicing Ease
Ergonomics
Model Availability
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 a standard front seat center airbag, which deploys between the driver and front passenger, protecting them from injuries caused by striking each other in serious side impacts. The QX55 doesn’t offer front seat center airbags.

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 has standard Post-Collision Brake, which automatically apply 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.

When descending a steep, off-road slope, the GLC Coupe’s standard Downhill Speed Regulation allows you to creep down safely. The QX55 doesn’t offer Downhill Speed Regulation.

Earlier warning of stopped traffic, traffic signals, dangerous road conditions, weather, or accidents, can keep driver's safer and prevent crashes. The GLC Coupe has Car-to-X Communication, a system that seamlessly communicates important warnings to the driver about impending danger, if they're available. The QX55 doesn’t offer a system that can receive automated systems from infrastructure or other vehicles.

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.

Side impacts caused 23% of all road fatalities in 2018, down from 29% in 2003, when the Insurance Institute for Highway Safety introduced its side barrier test. In order to continue improving vehicle safety, the IIHS has started using a more severe side impact test: 37 MPH (up from 31 MPH), with a 4180-pound barrier (up from 3300 pounds). The results of this newly developed test demonstrates that the Mercedes GLC Coupe is safer than the QX55:

	GLC Coupe	QX55
Overall Evaluation	GOOD	ACCEPTABLE
Structure	GOOD	MARGINAL
	Driver Injury Measures
Head/Neck	GOOD	GOOD
Head Injury Criterion	108	141
Neck Tension	156 lbs.	178 lbs.
Neck Compression	22 lbs.	89 lbs.
Torso	GOOD	ACCEPTABLE
Shoulder Deflection	.55 in	1.06 in
Shoulder Force	134 lbs.	178 lbs.
Torso Max Deflection	.94 in	1.73 in
Torso Deflection Rate	8 MPH	9 MPH
Pelvis	GOOD	MARGINAL
Pelvis Force	736 lbs.	1316 lbs.
Head Protection	GOOD	GOOD
	Passenger Injury Measures
Head/Neck	GOOD	GOOD
Torso	GOOD	GOOD
Shoulder Force	67 lbs.	201 lbs.
Torso Max Deflection	.98 in	1.42 in
Torso Deflection Rate	7 MPH	7 MPH
Pelvis	GOOD	GOOD
Head Protection	GOOD	GOOD

The Mercedes GLC Coupe achieved a “Top Safety Pick” rating from the Insurance Institute for Highway Safety (IIHS) for the 2024 model year. This recognition was based on its impressive performance in the small overlap frontal crash test, updated side impact crash test, headlight evaluations, and pedestrian crash prevention testing. The QX55 is not a “Top Safety Pick” for 2024.

Warranty

There are almost 2 times as many Mercedes dealers as 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’ 2024 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 1 fewer problems per 100 vehicles in the first three years of ownership, J.D. Power ranks Mercedes higher than Infiniti.

Engine

The GLC Coupe’s 2.0 turbo 4-cylinder hybrid produces 15 lbs.-ft. more torque (295 vs. 280) than the QX55’s 2.0 turbo 4-cylinder.

Fuel Economy and Range

On the EPA test cycle the GLC 300 Coupe gets better fuel mileage than the QX55 (23 city/31 hwy vs. 22 city/28 hwy).

Regenerative brakes improve the GLC Coupe’s fuel efficiency by converting inertia back into energy instead of wasting it. The QX55 doesn’t offer a regenerative braking system.

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.

Environmental Friendliness

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes GLC Coupe higher (6 out of 10) than the Infiniti QX55 (5). This means the GLC Coupe produces up to 6.9 pounds less smog-producing pollutants than the QX55 every 15,000 miles.

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 255/40R21 front and 285/35R21 rear tires provide better handling because they have a lower 40 series front and 35 series rear profile (height to width ratio) that provides a stiffer sidewall than the QX55’s 45 series tires.

For better ride, handling and brake cooling the GLC Coupe offers optional 21-inch wheels. The QX55’s largest wheels are only 20-inches.

The GLC Coupe 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 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 3.5 inches longer than on the QX55 (113.7 inches vs. 110.2 inches).

Chassis

The design of the Mercedes GLC Coupe amounts to more than styling. The GLC Coupe has an aerodynamic coefficient of drag of .27 Cd. That is significantly 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 1.1 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, the GLC Coupe has standard driver and 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 fluid is standard on the GLC Coupe to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The QX55 doesn’t offer heated windshield washer fluid.

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 Mercedes GLC Coupe and Infiniti QX55 offer exterior mirrors that can be folded to provide convenience. The GLC Coupe features standard power folding mirrors, which allow for easy, one-touch folding or unfolding at the driver’s discretion. This provides added convenience when maneuvering or parking, as well as when walking past the parked vehicle. In comparison, the QX55’s foldable mirrors are manual, requiring the driver to get out and physically fold them once parked and unfold them before getting in.

The GLC Coupe’s Active Parking Assist can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The QX55 doesn’t offer an automated parking system.

Model Availability

and e Mercedes GLC comes in four door bodystyles; the Infiniti QX55 isn’t available as a .

Recommendations

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

The Mercedes GLC outsold the Infiniti QX55 by over seven to one during 2023.

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