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2026 Mercedes-Benz GLB-Class Specs: MPG, Gas Mileage, Engine Size & Dimensions

2020–2026 model years20 variantsUp to 28 MPG combined
Real-World MPG QuestionsBed Dimensions & Cargo SpaceService Intervals

Mercedes-Benz GLB-Class maintenance schedule by model year

Verified year-by-year intervals for 2024–2024 are listed on the Mercedes-Benz GLB-Class maintenance schedule, where you can switch model year in the table.

2026 Mercedes-Benz GLB-Class Specs at a Glance

The 2026 Mercedes-Benz GLB-Class gets 28 mpg combined on the 2.0L Front-Wheel Drive configuration, weighs 3,869 lbs, measures 182.3 in long. Figures are per configuration, not a single official number — other trims rate as low as 23 mpg combined. Every figure below comes from EPA, NHTSA, or manufacturer published data — no estimates.

Combined MPG
28 mpg (25 city / 33 hwy)
Best configuration: 2.0L · Front-Wheel Drive · Automatic (AM8) · other 2026 trims rate 23–28 mpg combined
Engine
2.0L 4-cyl
2.0L · Front-Wheel Drive · Automatic (AM8)
Curb weight
3,869 lbs
Heaviest recorded configuration: GLB CLASS AMG 35 4DR SUV
Length
182.3 in · 72 in wide · 66.5 in tall
Wheelbase
111.4 in
NHTSA overall
5-star (2023)

2026 Mercedes-Benz GLB-Class trims and MPG

TrimEngineTransDriveCityHwyCombined
Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)Front-Wheel Drive253328
Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive243327
Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive212723

Detailed Specifications

MPG & Fuel Economy

MPG for every year and trim

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Engine Specifications

Engine Specs for every year and trim

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Annual Fuel Cost

Fuel Cost for every year and trim

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Transmission Specifications

Transmission for every year and trim

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Drivetrain & Drive Type

Drivetrain for every year and trim

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Vehicle Class & EPA Size Category

Vehicle Class for every year and trim

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Maintenance Schedule & Service Intervals

Maintenance for every year and trim

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Dimensions & Size

Dimensions for every year and trim

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Curb Weight

Curb Weight for every year and trim

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NHTSA Safety Ratings

Safety for every year and trim

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Mercedes-Benz GLB-Class — All Years Overview

YearTrimEngineTransDriveCityHwyCombinedFuel
2026Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)Front-Wheel Drive253328Premium Gasoline
2026Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive243327Premium Gasoline
2026Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive212723Premium Gasoline
2025Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive243327Premium Gasoline
2025Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)Front-Wheel Drive253328Premium Gasoline
2025Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive212623Premium Gasoline
2024Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive212623Premium Gasoline
2024Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)Front-Wheel Drive253328Premium Gasoline
2024Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive243227Premium Gasoline
2023Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive212723Premium Gasoline
2023Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive223025Premium Gasoline
2023Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)Front-Wheel Drive243227Premium Gasoline
2022Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive202722Premium Gasoline
2022Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)Front-Wheel Drive243227Premium Gasoline
2022Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)All-Wheel Drive223025Premium Gasoline
2021Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)Front-Wheel Drive233126Premium Gasoline
2021Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)4-Wheel Drive233026Premium Gasoline
2021Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)4-Wheel Drive212623Premium Gasoline
2020Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)4-Wheel Drive233126Premium Gasoline
2020Auto (AM8), 4 cyl, 2.0 L4 · 2.0LAutomatic (AM8)Front-Wheel Drive233026Premium Gasoline

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Mercedes-Benz GLB-Class — Frequently Asked Questions

What is the fuel economy of the 2026 Mercedes-Benz GLB-Class?

The Mercedes-Benz GLB-Class is EPA-rated at up to 28 MPG combined (25 city / 33 highway).

What engine does the 2026 Mercedes-Benz GLB-Class have?

The Mercedes-Benz GLB-Class uses a 2.0L 4-cylinder engine paired with an Automatic transmission.

What years of the Mercedes-Benz GLB-Class are covered here?

This page documents 20 verified Mercedes-Benz GLB-Class configurations across model years 2020–2026.

Which model year of the Mercedes-Benz GLB-Class is the most fuel efficient?

The 2026 Mercedes-Benz GLB-Class holds the highest combined rating at 28 MPG; the 2020 sits lowest at 26 MPG, a difference of 2 MPG (about 8%) across the 7 rated years on file.

How many engine options does the Mercedes-Benz GLB-Class have?

Across every year on record the Mercedes-Benz GLB-Class uses one displacement, 2L, so trims differ by drivetrain and equipment rather than engine size.

Is the 2026 Mercedes-Benz GLB-Class front-wheel drive or all-wheel drive?

The Mercedes-Benz GLB-Class appears in 3 drivetrain layouts across the years documented here — Front-Wheel Drive, All-Wheel Drive, 4-Wheel Drive — with the latest 2026 record on Front-Wheel Drive.

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