2026 Mercedes-Benz GLB (X248) Dimensions, Size & Specs

The curb weight of the 2026 Mercedes-Benz GLB (X248) ranges from 2125 to 2205 kg (4685 to 4860 lbs), while its maximum permissible weight is between 2700 and 2780 kg (5952 to 6127 lbs). This relatively moderate weight contributes to stable handling, balanced driving dynamics, and good fuel efficiency for a luxury SUV with its size and equipment level. The curb weight reflects the vehicle’s build quality, safety features, and onboard technology, whereas the maximum weight indicates its capability to carry passengers and cargo without impairing performance. The weight distribution plays a critical role in providing the GLB with confident road manners and ride comfort.

The 2026 Mercedes-Benz GLB offers a luggage capacity ranging from 480 to 540 liters (16.9 to 19.1 cubic feet) with the rear seats upright, making it suitable for everyday errands, grocery runs, or travel with moderate baggage. When the rear seats are folded down, the capacity expands significantly to between 1605 and 1715 liters (56.6 to 60.5 cubic feet). This versatility allows owners to transport large or bulky items such as furniture, sports equipment, or extensive luggage with ease. The flexible interior layout significantly enhances the GLB's practicality, catering to both passenger comfort and cargo needs.

The 2026 Mercedes-Benz GLB is equipped to handle a roof load of up to 75 kg (165 lbs). This allowance enables owners to safely carry additional cargo on the roof, such as roof boxes, bicycles, kayaks, or luggage racks. It’s essential to stay within this limit to avoid negatively affecting vehicle stability and safety. Roof load capacity enhances the vehicle’s versatility for outdoor adventures or trips requiring extra gear, without compromising interior passenger space or comfort.

The 2026 Mercedes-Benz GLB offers a range of tire sizes including 235/55 R18, 255/45 R19, 255/40 R20, 215/60 R18, 235/50 R19, and 235/45 R20. Corresponding rim sizes vary from 7.5J x 18 up to 20.7J x 20 inches. Larger rims combined with lower-profile tires tend to improve handling and provide a sportier look, but can sometimes reduce ride comfort over rough roads. Alternatively, smaller rims with higher-profile tires generally deliver a smoother ride and increased durability in harsh conditions. This variety allows customers to choose configurations that best suit their driving preferences and aesthetic tastes.

With external dimensions of 4732 mm (186.3 inches) in length, 1861 mm (73.3 inches) in width (2029 mm/79.8 inches with mirrors extended), and a height of 1687 mm (66.4 inches), the 2026 Mercedes-Benz GLB comfortably fits into most standard home garages. Standard single-car garage door openings typically range from 2440 mm to 2700 mm (96 to 106 inches) wide and 1981 mm to 2134 mm (78 to 84 inches) tall, which accommodates the GLB's height and width—with mirrors folded. However, the mirror width with opened mirrors (2029 mm / 79.8 in) approaches common door width limits, so care is needed when opening mirrors inside a garage. Overall, homeowners with typical garages should have no significant difficulty parking the GLB.

The 2026 Mercedes-Benz GLB (X248) continues from the previous GLB generation introduced in 2019 with subtle dimensional refinements. Compared to its predecessor, the new GLB maintains a similar footprint in length and width, roughly around 4730 mm and 1860 mm wide, ensuring retained interior space and driving agility. However, improvements in the latest model focus on weight optimization and technology rather than radical size changes. This continuity ensures the GLB maintains its competitive edge as a compact luxury SUV, balancing roominess and maneuverability while refining build quality and efficiency.

Within the compact luxury SUV segment, the 2026 Mercedes-Benz GLB (X248) stands out with its generous luggage capacity of up to 1715 liters (60.5 cubic feet) with rear seats folded, exceeding many competitors such as the BMW X1 or Audi Q3. Its length of 4732 mm (186.3 inches) and width of 1861 mm (73.3 inches) balance interior spaciousness with urban usability. Additionally, the GLB's uniquely available seven-seat configuration, combined with flexible cargo options and a solid roof load limit of 75 kg (165 lbs), offers practical advantages for families and active lifestyles. Its thoughtful dimensioning supports both daily driving comfort and adventure readiness.

The 2026 Mercedes-Benz GLB (X248) features a robust yet refined design characterized by a boxy silhouette that maximizes interior volume and headroom. It integrates the latest Mercedes multimedia and safety technology with a modern digital cockpit and advanced driver assistance systems. Its flexible seating arrangement allows the option for seven passengers, a rarity in this size segment. The GLB blends luxury and practicality, offering SUV capabilities with a compact footprint, all while employing the renowned Mercedes-Benz craftsmanship, high-quality materials, and customizable trim options that appeal to discerning buyers who require versatility without compromising style.

The 2026 Mercedes-Benz GLB builds upon the strengths of its predecessor by incorporating upgraded engine options, improved suspension tuning, and enhanced driver-assistance technologies, providing a more dynamic and confident driving experience. Compared to competitors in its class, it offers a well-balanced blend of performance, comfort, and innovative features such as MBUX infotainment with voice control and semi-autonomous driving aids. The GLB's interior comfort, spaciousness, and technology integration make it highly competitive among compact luxury SUVs, providing a modern, enjoyable driving experience suited for both daily commuting and longer journeys.