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Using vehicle speed sensors and seat sensors, smart airbags in the UX Series deploy with different levels of force or don’t deploy at all to help better protect passengers of all sizes in different collisions. The UX Series’ side airbags will shut off if a child is leaning against the door. The GLB’s airbags don’t have smart features and will always deploy full force.
The UX Series has standard Whiplash Injury Lessening Front Seatbacks, which use a specially designed seat to protect the driver and front passenger from whiplash. During a rear-end collision, the Whiplash Injury Lessening Front Seatbacks system allows the backrest to travel backwards to cushion the occupants and the headrests move forward to prevent neck and spine injuries. The GLB doesn’t offer a whiplash protection system.
The UX Series has standard Secondary Collision Brake, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The GLB 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.
Over 200 people are killed each year when backed over by motor vehicles. The UX Series offers optional Parking Support Brake that uses rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The GLB doesn’t offer backup collision prevention brakes.
To help make backing safer, the UX Series’ optional cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The GLB doesn’t offer a cross-path warning system.
Both the UX Series and the GLB have standard driver and passenger frontal airbags, front and rear side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, front-wheel drive, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, driver alert monitors, available blind spot warning systems and rear parking sensors.
For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, its standard vehicle-to-vehicle front crash prevention system, its standard vehicle-to-pedestrian front crash prevention system, and its available headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the UX Series the rating of “Top Pick” for 2020, a rating granted to only 30 vehicles tested by the IIHS. The GLB has not been tested, yet.
Lexus’ powertrain warranty covers the UX Series 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 UX Series’ corrosion warranty is 1 year longer than the GLB’s (6 vs. 5 years).
J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Lexus vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Lexus 8th in initial quality, above the industry average. With 4 more problems per 100 vehicles, Mercedes is ranked 12th, below the industry average.
J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Lexus vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Lexus first in reliability, above the industry average. With 28 more problems per 100 vehicles, Mercedes is ranked 13th.
From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Lexus vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Lexus first in reliability. Mercedes is ranked 21st.
On the EPA test cycle the UX 250h gets better fuel mileage than the GLB 4MATIC SMG (41 city/38 hwy vs. 23 city/31 hwy).
On the EPA test cycle the UX 200 FWD CVT gets better fuel mileage than the GLB 250 FWD Auto (29 city/37 hwy vs. 23 city/30 hwy).
Regenerative brakes improve the UX Series Hybrid’s fuel efficiency by converting inertia back into energy instead of wasting it. The GLB doesn’t offer a regenerative braking system.
To lower fuel costs and make buying fuel easier, the Lexus UX Series uses regular unleaded gasoline (premium recommended for maximum performance). The GLB requires premium, which can cost 20 to 55 cents more per gallon.
The UX Series 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 UX Series’ tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the GLB’s standard 55 series tires.
Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the UX Series 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.
The UX Series has standard front and rear gas-charged shocks for better control over choppy roads. The GLB’s suspension doesn’t offer gas-charged shocks.
For better maneuverability, the UX Series’ turning circle is 4.2 feet tighter than the GLB’s (34.2 feet vs. 38.4 feet).
The Lexus UX Series may be more efficient, handle and accelerate better because it weighs about 300 to 350 pounds less than the Mercedes GLB.
The UX Series is 5.4 inches shorter than the GLB, making the UX Series easier to handle, maneuver and park in tight spaces.
The UX Series has a much larger cargo volume than the GLB with its rear seat up (21.7 vs. 5.1 cubic feet).
J.D. Power and Associates surveys of service recipients show that Lexus service is better than Mercedes. J.D. Power ranks Lexus second in service department satisfaction. With a 11% lower rating, Mercedes is ranked fifth.
To improve rear visibility by keeping the rear window clear, the UX Series 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.
In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The UX Series offers available headlight washers to keep headlight output high. The GLB doesn’t offer headlight washers.
Consumer Reports® recommends the Lexus UX Series, based on reliability, safety and performance.
The Lexus UX Series outsold the Mercedes GLB by over 14 to one during 2019.
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