Compare the2025 Mercedes AMG GLBVS 2025 Acura RDX

Safety
Warranty
Engine
Fuel Economy and Range
Transmission
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Chassis
Passenger Space
Ergonomics

Safety

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For enhanced safety, the front and second-row seat shoulder belts of the Mercedes AMG GLB 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 AMG GLB’s optional 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 AMG GLB 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 AMG GLB and RDX have rear cross-traffic warning, but the AMG GLB 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 AMG GLB’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 AMG GLB 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.

Warranty

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

Engine

The AMG GLB’s 2.0 turbo 4-cylinder hybrid produces 30 more horsepower (302 vs. 272) and 15 lbs.-ft. more torque (295 vs. 280) than the RDX’s 2.0 turbo 4-cylinder.

As tested in Car and Driver the Mercedes AMG GLB is faster than the Acura RDX:

	AMG GLB	RDX
Zero to 60 MPH	4.9 sec	6.2 sec
Zero to 100 MPH	12.7 sec	16.9 sec
5 to 60 MPH Rolling Start	6.1 sec	6.9 sec
Passing 30 to 50 MPH	3.2 sec	3.8 sec
Passing 50 to 70 MPH	4.2 sec	5.1 sec
Quarter Mile	13.5 sec	14.9 sec
Speed in 1/4 Mile	102 MPH	94 MPH
Top Speed	155 MPH	112 MPH

Fuel Economy and Range

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

Transmission

The AMG GLB 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.

The AMG GLB’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The RDX doesn’t offer launch control.

Brakes and Stopping

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

	AMG GLB	RDX
Front Rotors	13.8 inches	12.4 inches
Rear Rotors	13 inches	12.2 inches

The AMG GLB’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 AMG GLB stops shorter than the RDX:

	AMG GLB	RDX
70 to 0 MPH	173 feet	180 feet	Car and Driver

Tires and Wheels

The AMG GLB’s standard tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the RDX’s standard 55 series tires. The AMG GLB’s optional tires have a lower 35 series profile than the RDX A-Spec’s 45 series tires.

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

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the AMG GLB 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.

Suspension and Handling

The AMG GLB’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 AMG GLB’s wheelbase is 3.1 inches longer than on the RDX (111.4 inches vs. 108.3 inches).

The AMG GLB 35 handles at .87 G’s, while the RDX A-Spec pulls only .83 G’s of cornering force in a Car and Driver skidpad test.

Chassis

The AMG GLB is 4.3 inches shorter than the RDX, making the AMG GLB easier to handle, maneuver and park in tight spaces.

Passenger Space

The AMG GLB offers optional seating for 7 passengers; the RDX can only carry 5.

The AMG GLB has 1.1 inches more front headroom and 1 inch more rear headroom than the RDX.

For enhanced passenger comfort on long trips the AMG GLB’s middle row seats recline. The RDX’s rear seats don’t recline.

Ergonomics

Unlike the driver-only memory system in the RDX, the AMG GLB has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, suspension setting, power steering assist, outside mirror angle, climate settings and radio stations and the front passenger seat also adjusts to the new passenger’s preset preferences.

The AMG GLB’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 AMG GLB’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 nozzles are optional on the AMG GLB to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The RDX doesn’t offer heated windshield washer nozzles.

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

The AMG GLB’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 AMG GLB 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 AMG GLB offers optional massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the RDX.

The AMG GLB has a 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 AMG GLB’s Active Parking Assist can parallel park or back into a parking spot by itself, stopping and changing direction automatically. The RDX doesn’t offer an automated parking system.