Compare the2026 Mercedes GLC Coupe VS 2026 Acura RDX

For enhanced safety, the front and rear seat shoulder belts of the Mercedes GLC Coupe have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Acura RDX doesn’t offer pretensioners for its rear seat belts.

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 RDX 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 RDX 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 RDX doesn’t offer a whiplash protection system.

With its available Active Distance Assist Distronic, the Mercedes GLC Coupe is better at preventing collisions with pedestrians than the Acura RDX, according to the Insurance Institute for Highway Safety:

	GLC Coupe	RDX
Overall Evaluation	GOOD	ACCEPTABLE
	Crossing Child - DAY
12 MPH	AVOIDED	AVOIDED
25 MPH	AVOIDED	-16 MPH
	Crossing Adult - NIGHT
12 MPH Brights	AVOIDED	AVOIDED
12 MPH Low beams	AVOIDED	-10 MPH
25 MPH Brights	AVOIDED	AVOIDED
25 MPH Low beams	AVOIDED	-24 MPH
	Parallel Adult - NIGHT
25 MPH Brights	AVOIDED	-23 MPH
25 MPH Low beams	AVOIDED	No Slowing
37 MPH Brights	AVOIDED	-31 MPH
37 MPH Low beams	-26 MPH	No Slowing
Warning Issued-Low beams	1 sec	No Warning

The GLC Coupe offers optional Post-Collision Brake, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The RDX 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.

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 RDX doesn’t offer a system that can receive automated systems from infrastructure or other vehicles.

Both the GLC Coupe and RDX 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 RDX’s Rear Cross Traffic Monitor 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 RDX doesn’t offer a driver alert monitor.

Both the GLC Coupe and the RDX have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, 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.

The Mercedes GLC Coupe achieved a “Top Safety Pick” rating from the Insurance Institute for Highway Safety (IIHS) for the 2026 model year. This recognition was based on its impressive performance in the small overlap frontal crash test, updated moderate overlap front crash test, updated side impact crash test, headlight evaluations, pedestrian crash prevention testing, and vehicle-to-vehicle crash prevention testing. The RDX has not yet been fully evaluated by the IIHS for 2026.

There are over 40 percent more Mercedes dealers than there are Acura dealers, which makes it easier should you ever need service under the GLC Coupe’s warranty.

J.D. Power and Associates’ 2025 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 With 6 fewer problems per 100 vehicles in the first three years of ownership, J.D. Power ranks Mercedes higher than Acura.

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

On the EPA test cycle the GLC Coupe gets better mileage than the RDX:

			MPG
GLC Coupe
		2.0 turbo 4-cyl. Hybrid	23 city/31 hwy
RDX
		2.0 turbo 4-cyl.	21 city/27 hwy
		A-Spec 2.0 turbo 4-cyl.	21 city/26 hwy

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

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

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

	GLC Coupe	RDX
Front Rotors	13.5 inches	12.4 inches
Rear Rotors	12.6 inches	12.2 inches

The GLC Coupe’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the RDX are solid, not vented.

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 RDX A-Spec’s 45 series tires.

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 RDX doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the GLC Coupe’s wheelbase is 5.4 inches longer than on the RDX (113.7 inches vs. 108.3 inches).

For enhanced passenger comfort on long trips the GLC Coupe’s rear seats recline. The RDX’s rear seats don’t recline.

The GLC Coupe’s standard towing capacity is much higher than the RDX’s (3500 vs. 1500 pounds).

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 RDX doesn’t offer electronic trailer sway control.

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

Unlike the driver-only memory system in the RDX, 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 GLC Coupe’s standard Keyless-Go allow you to unlock the doors from any outside door handle, open the cargo door, and start the engine, all without removing the key from pocket or purse. Smart Entry standard on the RDX doesn’t offer a sensor on the rear doors, so you’ll have to reach a front handle to unlock the rear doors.

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 RDX’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 RDX doesn’t offer heated windshield washer fluid.

To help drivers see further while navigating curves, the GLC Coupe offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The RDX doesn’t offer cornering lights.

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 RDX has an automatic rear view mirror, but its side mirrors don’t dim.

The Mercedes GLC Coupe has power folding mirrors that offer unparalleled convenience while maneuvering in tight places or parked. With the mirrors folded it’s easier to walk past and help prevent parking damage. The mirrors can be quickly unfolded when the driver is ready to leave. Power folding mirrors are only offered on the RDX Advance.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes GLC has a standard wireless phone charging system (Qi) in the center console. Wireless charging costs extra on the RDX.

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 RDX doesn’t offer an automated parking system.

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

The Mercedes GLC outsold the Acura RDX by over two to one during 2025.