Mercedes-Benz consistently redefines automotive categories, and the 2021 Mercedes-Benz GLB-Class is a prime example of their innovative approach. Positioned strategically between the GLA and GLC, the GLB occupies a unique space, larger than a subcompact yet not quite a full compact SUV. However, to simply categorize it by size would be to overlook its distinctive character and capabilities.
While size classifications might suggest compromise, the GLB delivers a surprisingly spacious interior, a comfortable ride, and a wealth of modern technology. This blend of practicality and luxury sets it apart in a crowded segment. The GLB also distinguishes itself with a boxier, more upright design, reminiscent of the iconic G-Wagen, offering a visual departure from its more streamlined siblings and competitors. Even an optional, albeit small, third-row seat is available, a rarity in this class, further emphasizing its commitment to maximizing space and utility.
Though the standard GLB 250 prioritizes comfort and refinement over outright sportiness, the introduction of the AMG GLB 35 variant injects a significant dose of performance into the lineup. Overall, the 2021 Mercedes-Benz GLB-Class presents a compelling package, often outperforming rivals like the BMW X1, Audi Q3, and Volvo XC40. However, prospective buyers should be mindful of the extensive options list, as adding desired features can elevate the price considerably. Let’s delve deeper into what makes the Mercedes-Benz GLB a standout in its class.
Edmunds Expert Evaluation: A Benchmark for Luxury SUVs
The Edmunds Vehicle Testing Team, renowned for their rigorous evaluations, puts each vehicle through a comprehensive assessment, combining track tests with real-world driving experiences. Their Expert Ratings are derived from over 30 data points, covering every facet of the automotive experience, providing consumers with trusted and objective reviews.
Great
8.1/10
edmunds TESTED
The Edmunds team highlights the GLB as a particularly attractive luxury SUV within its price range. Its boxy design not only provides a unique aesthetic but also translates directly into enhanced passenger and cargo space. Coupled with some of the most advanced technology available, the GLB earns its place as a leading small luxury SUV.
Evaluated and rated by America’s leading automotive testing professionals.
Performance
8/10
Driving Dynamics of the GLB-Class: In Edmunds’ testing, the GLB 250 demonstrated impressive acceleration, reaching 60 mph in just 6.5 seconds. This figure places it at the upper end of its class for speed. While full-throttle acceleration may exhibit a slight initial delay, the GLB delivers smooth and responsive power under normal driving conditions. Although not designed as a sports car, the GLB provides more than sufficient performance for typical SUV driving needs. Braking performance is equally commendable, offering both smooth modulation for everyday stops and confident stopping power in emergency situations. Handling around corners is secure and planted, inspiring driver confidence.
Comfort
8.5/10
GLB-Class Ride and Seating Comfort: For long journeys, the optional multi-contour seats, equipped with ventilation and heating, provide exceptional comfort. The “massage” function, while not a traditional massage, subtly adjusts seatback and cushion angles to redistribute pressure points, effectively minimizing fatigue on extended drives. Rear seat comfort is generally good, although taller passengers might find thigh support slightly lacking due to the lower and shorter seat cushions. The GLB’s suspension, particularly in Comfort mode, excels at absorbing road imperfections, delivering a smooth and composed ride. While minor floatation may be perceptible on undulating surfaces, it remains far from unsettling. Sport mode firms up the suspension without compromising ride quality. The cabin maintains a hushed environment even at highway speeds and on rough road surfaces.
Interior
8.5/10
Inside the GLB-Class Cabin: The GLB’s design prioritizes ease of access. The elevated ride height and generously sized door openings facilitate effortless entry and exit. The interior layout is characterized by logical control placement, allowing drivers to quickly familiarize themselves with and operate vehicle functions without distraction. The boxy exterior dimensions translate into a spacious cabin, surpassing many competitors in terms of passenger and cargo room. Excellent outward visibility is afforded by the tall windows. A minor drawback is the somewhat undersized sun visors, which may not provide complete sun blockage when positioned to the side.
Technology
8.5/10
Technology and Infotainment in the GLB: The GLB excels in its technology offerings, featuring Mercedes’ acclaimed MBUX infotainment system along with seamless Apple CarPlay and Android Auto integration. MBUX stands out for its user-friendliness and multiple control methods. Voice commands are generally accurate, although processing may occasionally take a moment. The driver-assistance features are particularly noteworthy. Adaptive cruise control performs admirably in both heavy traffic and open highway scenarios. The lane-keeping assist system, while effective, can occasionally be slightly assertive in its lane-centering efforts, though this is infrequent.
Storage
8/10
Cargo and Storage Capacity: The GLB’s boxy silhouette proves advantageous for cargo hauling, accommodating larger and bulkier items with ease. The low cargo floor liftover height and standard power liftgate simplify loading and unloading. Ample storage for personal items is available throughout the cabin, including large door pockets and a generously sized center console bin. Thoughtful details like spring-loaded cupholder tabs ensure secure placement for narrower beverages. For families, the GLB proves to be a practical choice. Rear-facing infant safety seats can be accommodated, provided the rear seats are fully slid back and front seats are reasonably positioned. However, some car seat bases may present a slight challenge when latching onto the GLB’s car-seat anchor points.
Fuel Economy
7.5/10
GLB Fuel Efficiency: The EPA estimates the GLB’s fuel economy at 26 mpg combined city/highway, slightly exceeding most rivals in its class. Edmunds’ own 115-mile evaluation route yielded 26 mpg, aligning closely with EPA estimates and indicating real-world fuel efficiency. Achieving the EPA figure in everyday driving should be attainable with moderate driving habits.
Value
7.5/10
GLB-Class Value Proposition: The GLB effectively bridges the gap between the smaller, more affordable GLA and the larger, more premium GLC. It represents a compelling option, particularly when its base configuration is considered. However, extensive optioning can rapidly escalate the price, potentially pushing it into GLC territory, which offers a more refined experience. Compared to other extra-small luxury SUVs, the GLB carries a slightly higher price tag, but this is justified by its superior space, performance, and comfort. While some material choices may reflect cost considerations typical in this class, the GLB generally conveys a sense of value commensurate with its price point.
Wildcard
8/10
GLB Styling and Driving Character: The GLB’s boxy and upright styling lends it a more traditional and utilitarian SUV aesthetic, a departure from many modern, coupe-like SUV designs, and a point of appeal for many. While the GLB 250 may not be described as “fun” in the traditional sense of sporty driving dynamics, this is primarily due to its focus on comfort and practicality. The introduction of the AMG GLB 35, however, addresses the desire for more exhilarating performance, offering a significantly more potent driving experience.
Edmunds Recommendation: Choosing the Right GLB-Class
For a wide range of drivers, the base GLB 250, available in both front-wheel-drive and 4Matic all-wheel-drive configurations (for regions with inclement weather), provides an excellent balance of features and value. However, for those seeking a more engaging driving experience, the AMG GLB 35 is highly recommended. Its enhanced 302-horsepower engine and performance-tuned suspension transform the GLB into a surprisingly agile and spirited small SUV. While the AMG variant commands a higher price, the performance upgrade is substantial and worthwhile for driving enthusiasts.
Compare 2021 Mercedes-Benz GLB-Class trim levels – Explore trim summaries and side-by-side comparisons.
2021 Mercedes-Benz GLB-Class Model Lineup
The 2021 Mercedes-Benz GLB-Class is offered as a small, entry-level luxury SUV with standard five-passenger seating. An optional third-row seat expands capacity to seven, although the third row is best suited for smaller occupants. The GLB lineup consists of three trim levels: GLB 250, GLB 250 4Matic, and AMG GLB 35.
The GLB 250 and GLB 250 4Matic share a turbocharged 2.0-liter four-cylinder engine producing 221 horsepower and 258 lb-ft of torque, paired with an eight-speed automatic transmission. The GLB 250 is front-wheel drive, while the 4Matic version features standard all-wheel drive. The AMG GLB 35 utilizes a high-output version of the same engine, delivering 302 hp and 295 lb-ft of torque, also with an eight-speed transmission and standard all-wheel drive.
GLB 250 and GLB 250 4Matic Standard Features: The base GLB trims are generously equipped, including:
- LED headlights
- Power liftgate
- 18-inch wheels
- Aluminum roof rails
- Heated side mirrors
- Rain-sensing windshield wipers
- Push-button start
Interior appointments include:
- Dual-zone automatic climate control
- MB-Tex simulated leather upholstery
- Power-adjustable front seats with memory
- Sliding and reclining rear seats
- Household-style 115V power outlet
Standard technology and safety features:
- 7-inch touchscreen infotainment display
- Touchpad controller
- Digital instrument cluster display
- Mercedes-Benz User Experience (MBUX) infotainment system
- Apple CarPlay and Android Auto integration
- Four USB-C ports
- Blind-spot monitoring
- Forward collision warning with automatic emergency braking
AMG GLB 35 Upgrades: In addition to its performance enhancements and all-wheel-drive system, the AMG GLB 35 adds:
- 19-inch AMG wheels
- Aluminum and brushed stainless-steel interior trim
- 10.25-inch infotainment display
- Enhanced driver information display
- Customizable ambient cabin lighting
Optional Packages and Standalone Options: Both the GLB 250 and AMG GLB 35 offer a wide array of optional features, available individually or within packages. Key options include:
- Driver Assistance package (adaptive cruise control, lane keeping assist, lane centering assist, enhanced blind-spot monitoring with collision avoidance steering assist)
- Panoramic sunroof
- Adaptive sport suspension
- Third-row seats
- Leather upholstery
- Heated and ventilated front seats
- Heated steering wheel
- Keyless Go (touch-sensitive door locking/unlocking)
- Navigation system
- Burmester premium sound system
- Wireless charging pad
Explore the Latest Mercedes-Benz GLB-Class News from Edmunds
