Compare the2025 Infiniti QX50VS 2025 Mercedes GLB

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the QX50 are reminded to check the back seat if they opened the rear door before starting out. The GLB doesn’t offer a back seat reminder.

The Infiniti QX50 has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags helps prevent the driver and front passenger from sliding under their seatbelts or the main frontal airbags; this keeps them better positioned during a collision for maximum protection. Knee airbags also help keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The GLB doesn’t offer a front passenger side knee airbag.

Over 200 people are killed each year when backed over by motor vehicles. The QX50 has standard Rear Automatic Braking that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The GLB doesn’t offer automatic braking for stationary objects directly to the rear.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the QX50. But it costs extra on the GLB.

The QX50’s standard lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. A lane departure warning system costs extra on the GLB.

Both the QX50 and the GLB 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, 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 around view monitors.

The QX50 comes with a full 4-year/60,000-mile basic warranty, which covers the entire truck and includes 24-hour roadside assistance. The GLB’s 4-year/50,000-mile basic warranty expires 10,000 miles sooner.

Infiniti’s powertrain warranty covers the QX50 2 years and 20,000 miles longer than Mercedes covers the GLB. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the GLB ends after only 4 years or 50,000 miles.

The QX50’s corrosion warranty is 2 years longer than the GLB’s (7 vs. 5 years).

Infiniti pays for scheduled maintenance on the QX50 for 3 years and 22500 miles. Infiniti will pay for oil changes, tire rotations, air filter replacements, cabin filter replacement, brake fluid replacement, inspections, and any other required maintenance. Mercedes doesn’t pay scheduled maintenance for the GLB.

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the QX50’s reliability 25 points higher than the GLB.

J.D. Power and Associates’ 2024 Initial Quality Study of new car owners surveyed provide the statistics that show that Infiniti vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Infiniti above average in initial quality. With 19 more problems per 100 vehicles, Mercedes is rated below average.

The QX50’s 2.0 turbo 4-cylinder produces 47 more horsepower (268 vs. 221) and 22 lbs.-ft. more torque (280 vs. 258) than the GLB’s 2.0 turbo 4-cylinder hybrid.

The QX50 has a standard continuously variable transmission (CVT). With no “steps” between gears, it can keep the engine at the most efficient speed for fuel economy, or keep it at its peak horsepower indefinitely for maximum acceleration. The GLB doesn’t offer a CVT.

The QX50’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the GLB are solid, not vented.

The QX50 stops shorter than the GLB:

For better traction, the QX50 Sport’s tires are larger than the largest tires available on the GLB (255/45R20 vs. 235/55R18).

For better ride, handling and brake cooling the QX50 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the GLB.

The QX50 has a standard easy tire fill system. When inflating the tires, the vehicle’s integrated tire pressure sensors keep track of the pressure as the tires fill and tell the driver when the tires are inflated to the proper pressure. The GLB doesn’t offer vehicle monitored tire inflation.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the QX50 can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. Run-flat tires aren’t available on some tire packages on the GLB.

For better handling and stability, the average track (width between the wheels) on the QX50 is 1.9 inches wider in the front and 1.5 inches wider in the rear than the track on the GLB.

The QX50 handles at .84 G’s, while the GLB 250 4MATIC pulls only .83 G’s of cornering force in a Motor Trend skidpad test.

The QX50 executes Motor Trend’s “Figure Eight” maneuver quicker than the GLB 250 4MATIC (26.7 seconds @ .66 average G’s vs. 27.4 seconds @ .62 average G’s).

For better maneuverability, the QX50’s turning circle is 2 feet tighter than the GLB’s (36.4 feet vs. 38.4 feet).

For greater off-road capability the QX50 has a greater minimum ground clearance than the GLB (8.6 vs. 7.9 inches), allowing the QX50 to travel over rougher terrain without being stopped or damaged.

The QX50 uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The GLB doesn’t offer active noise cancellation.

The QX50 has .3 inches more front headroom, 2 inches more front shoulder room, .6 inches more rear legroom and 2.2 inches more rear shoulder room than the GLB.

The QX50 has a much larger cargo volume with its rear seat up than the GLB with its rear seat up (31.4 vs. 12.4 cubic feet). The QX50 has a much larger cargo volume with its rear seat folded than the GLB with its rear seat folded (65.1 vs. 62 cubic feet).

The QX50’s cargo area is larger than the GLB’s in almost every dimension:

Pulling a handle automatically lowers the QX50’s rear seats, to make changing between passengers and cargo easier. The GLB doesn’t offer automatic folding seats.

J.D. Power and Associates surveys of service recipients show that Infiniti service is better than Mercedes. J.D. Power ranks Infiniti 6th in service department satisfaction (above the industry average). With a 24% lower rating, Mercedes is ranked 17th.

To improve rear visibility by keeping the rear window clear, the QX50 has a standard rear fixed intermittent wiper with a full on position. The rear wiper standard on the GLB only has an intermittent setting, so in a hard rain visibility isn’t as good.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the QX50 has standard extendable sun visors. The GLB doesn’t offer extendable visors.

Manual rear side window sunshades are available in the QX50 to help block heat and glare for the rear passengers. The GLB doesn’t offer rear side window sunshades.

Standard air-conditioned seats in the QX50 Sport keep the driver and front passenger comfortable and take the sting out of hot seats in Summer. The GLB doesn’t offer air-conditioned seats.

Consumer Reports® recommends the Infiniti QX50, based on reliability, safety and performance.