Mercedes-Benz has introduced the all-new GLB, a compact SUV that the company positions as a more spacious and technologically advanced replacement for its prior model. Available in five- or seven-seat configurations, the new GLB features expanded interior dimensions, updated drivetrains, revised suspension technology, a new design language, and the brand’s latest digital operating system. The GLB line will include fully electric variants as well as a new hybrid model. 
According to Mercedes-Benz, the redesigned GLB offers noticeably improved interior space over the outgoing version. Headroom increases for all three seating rows due to revised roofline geometry and the now-standard panoramic roof. Legroom grows primarily in the second row, supported by an extended wheelbase that is 2.4 inches longer than before. The GLB’s trunk capacity reaches 19.1 cubic feet with the second row upright, or 17 cubic feet when equipped with the optional third row. Folding the rear seats provides up to 60.6 cubic feet of total cargo capacity. A larger frunk is also part of the electric models.
The optional third row is designed to accommodate occupants up to 5 feet 6 inches tall. Mercedes-Benz states that ingress and egress have been improved through longer seat adjustment travel and enlarged door openings. The second row offers improved thigh support, revised foam construction, and additional adjustments when the sliding seat option is specified.
Two electric variants will be offered at launch: the GLB 250+ with EQ Technology and the GLB 350 4Matic with EQ Technology. Both models use an 85-kWh usable-capacity lithium-ion battery and an 800-volt electrical architecture. WLTP range estimates for the GLB 250+ reach up to 631 kilometers, while the more powerful GLB 350 4Matic is rated between 521 and 614 kilometers depending on configuration. The GLB 250+ produces 268 horsepower and 247 lb-ft of torque. The GLB 350 4Matic delivers 349 horsepower and 380 lb-ft. Mercedes-Benz estimates 0–60 mph times of 7.3 seconds and 5.4 seconds, respectively.
The 800-volt charging system enables DC fast charging at up to 320 kW. Under ideal conditions, Mercedes-Benz says the GLB can recover up to 260 kilometers of range in ten minutes. A DC converter is also included to allow compatibility with 400-volt fast-charging stations. The company highlights that its charging service, MB.Charge Public, integrates multiple charging networks under a unified authentication and billing interface, with cost transparency displayed both in the vehicle and through the associated app.
The electric GLB models use a newly developed Electric Drive Unit (EDU) featuring a rear-mounted permanently excited synchronous motor with a double-V magnet arrangement and hairpin-wound stator. Mercedes-Benz claims 93 percent battery-to-wheel efficiency in long-distance driving. A two-speed transmission provides short gearing for initial acceleration and a taller gear for higher-speed efficiency. The GLB 350 4Matic adds a front-axle motor acting as an on-demand “boost” unit. A Disconnect Unit can decouple the front motor under low-load conditions to reduce friction losses and improve range.
A new brake-by-wire system integrates recuperation and hydraulic braking within a unified module. Recuperation of up to 200 kW is possible, and the vehicle can brake electrically to a standstill in many scenarios. The system allows multiple recuperation levels ranging from coasting to enhanced deceleration. An Eco Assistant function analyzes navigation and sensor data to recommend energy-efficient driving and automatically activates recuperation based on road conditions and traffic.
Safety systems have been expanded. The new model includes more extensive sensor coverage, eight cameras, five radar sensors, and twelve ultrasonic sensors. Advanced driver-assistance features include Distance Assist Distronic as standard, with optional upgrades that add more active steering and automated parking functions. The GLB now incorporates a front-center airbag and knee airbags, along with structural improvements to side-impact protection. Mercedes-Benz states that the high-voltage battery and other electric components undergo a multi-stage protection strategy designed to isolate or deactivate the HV system automatically depending on impact severity.
Mercedes-Benz will also introduce a new hybrid powertrain. The hybrid variant uses a 1.5-liter turbocharged four-cylinder engine operating on the Miller cycle paired with a 48-volt electric motor integrated into an eight-speed dual-clutch transmission. The electric drive can support the combustion engine at all speeds and provides limited electric-only operation in city driving or under low-load conditions. Recuperation is available in all eight gears. A newly designed 48-volt battery provides up to 1.3 kWh of usable capacity. The hybrid model adopts much of the new electric GLB’s design, with the primary visible difference being its non-illuminated Mercedes-Benz star pattern grille.
Chassis development includes a multi-link rear axle similar to those used in higher-segment Mercedes-Benz vehicles. Optional adaptive damping enables distinct comfort or sport settings. The GLB 350 4Matic variant includes a Terrain drive program and a “transparent hood” camera function that provides a composite view of the area beneath the front of the vehicle when navigating off-pavement.
Design changes are extensive. The front fascia incorporates 94 illuminated chrome-effect Mercedes-Benz stars within the grille and an illuminated central emblem. LED headlights and taillights are connected with light bands emphasizing vehicle width. Wheel sizes up to 20 inches are available. Stronger shoulders, shorter overhangs, and a steeper windshield contribute to the brand’s intended visual identity. The bodywork is designed with smooth surfaces and reduced lines to support the claimed drag coefficient of 0.28.
A large panoramic roof is standard. An optional Sky Control roof uses switchable glass technology that can become transparent or opaque within milliseconds. The LED-illuminated star pattern embedded in the roof surface provides an ambient lighting feature visible primarily at night.
The interior layout adopts a more minimalist approach with key high-tech elements. The optional MBUX Superscreen spans the dashboard and integrates a 10.25-inch digital cluster, a 14-inch central display, and a 14-inch front passenger display under a single glass panel. Climate vents on each side are circular with floating visual elements. The center console is redesigned with additional storage and a more open architectural layout.
The GLB runs on the Mercedes-Benz Operating System (MB.OS), which supports over-the-air updates for a wide range of vehicle functions. The new MBUX system incorporates multiple AI agents from Microsoft and Google to support natural-language interactions, navigation queries, and general knowledge questions. A virtual assistant avatar is present on the display, capable of contextual conversation and short-term memory. Google Maps now provides the core navigation dataset, including charging-route planning for EV models.
Optional entertainment features include a Burmester 3D Surround Sound System with Dolby Atmos support, automatic seat-recognition sound zoning, and 16 total speakers. Rear passengers can benefit from improved thermal management since the new heat-pump system is adapted from the Vision EQXX research program. The company states that cabin heating is twice as fast as in the previous GLB while using about half the energy.
Mercedes-Benz reiterates that the modular GLB platform is designed to support both all-electric and hybrid powertrains for global markets. The company plans to provide additional details on pricing and market rollout at a later date.
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