Compare the2025 Mercedes GLAVS 2025 Acura RDX

For enhanced safety, the front and rear seat shoulder belts of the Mercedes GLA 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 GLA’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 GLA’s standard pretensioning seatbelts also sense rear collisions and remove slack from the seatbelts to help protect the occupants from whiplash and other injuries. The RDX doesn’t offer a whiplash protection system.

The GLA 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 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.

Both the GLA and RDX have rear cross-traffic warning, but the GLA 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 GLA’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 GLA and the RDX have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, blind spot warning systems, rearview cameras, rear cross-path warning, available all wheel drive, lane departure warning systems and around view monitors.

There are over 41 percent more Mercedes dealers than there are Acura dealers, which makes it easier should you ever need service under the GLA’s warranty.

As tested in Motor Trend the Mercedes GLA is faster than the Acura RDX:

On the EPA test cycle the GLA gets better mileage than the RDX:

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

The GLA 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 RDX doesn’t offer an SMG or a conventional manual transmission.

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

The GLA stops much shorter than the RDX:

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the GLA can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The RDX doesn’t offer run-flat tires.

The GLA’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 better maneuverability, the GLA’s turning circle is 1.5 feet tighter than the RDX’s (37.4 feet vs. 38.9 feet).

The Mercedes GLA may be more efficient, handle and accelerate better because it weighs about 550 to 650 pounds less than the Acura RDX.

The GLA is 1 foot, 1.8 inches shorter than the RDX, making the GLA easier to handle, maneuver and park in tight spaces.

The front grille of the GLA uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The RDX doesn’t offer active grille shutters.

The GLA has 2.3 inches more front hip room and 7.4 inches more rear hip room than the RDX.

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

Unlike the driver-only memory system in the RDX, the GLA has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The GLA’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 the 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 door.

The GLA’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 optional on the GLA 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 avoid possible obstacles, the GLA offers optional cornering lights to illuminate around corners when the turn signals are activated. The RDX doesn’t offer cornering lights. The GLA also offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle.

The GLA’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 GLA 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.

The GLA 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 RDX doesn’t offer a house-current electrical outlet.

The GLA’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.

The GLA is available in both front-wheel drive and four-wheel drive configurations. The RDX doesn’t offer a two-wheel drive configuration.