2025 Mercedes-Benz GLB-Class — Full Specifications
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The 2025 Mercedes-Benz GLB-Class is an estate/wagon powered by a 2L 4-cyl turbo premium gasoline engine. Its most fuel-efficient configuration returns around 34 mpg (UK) / 28 mpg (US EPA) combined, with 28–34 mpg (UK) across all configurations. Owners often keep a Mercedes-Benz GLB-Class workshop manual to hand for servicing and repairs.
Compared with the 2024 Mercedes-Benz GLB-Class: Fuel economy is essentially unchanged at around 34 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine | 2L 4-cyl turbo |
|---|---|
| Transmission | Automatic (AM8) |
| Fuel Type | Premium Gasoline |
| Powertrain | Hybrid |
| Drive | Front-Wheel Drive |
| Body Style | Estate/Wagon |
| Passenger Volume (EPA) | 125 cu ft (3,540 L) |
| Luggage Volume (EPA) | 12 cu ft (340 L) |
| Fuel Economy (UK) | 34 combined / 30 urban / 40 extra-urban mpg |
| Fuel Economy (US EPA) | 28 combined / 25 city / 33 highway mpg |
| CO₂ Emissions | 193 g/km |
| EPA Greenhouse Gas Score | 5 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $2,950 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2025 Mercedes-Benz GLB-Class, all with the 2L 4-cyl turbo engine. Combined fuel economy ranges from 23 to 28 mpg (US), or 28 to 34 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 2L 4-cyl turbo (Hybrid) | Automatic (AM8) | All-Wheel Drive | 28 | 23 (21/26) | 242 | $3,550 |
| 2L 4-cyl turbo (Hybrid) | Automatic (AM8) | Front-Wheel Drive | 34 | 28 (25/33) | 193 | $2,950 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 125 cubic feet (about 3,540 litres) and luggage volume at 12 cubic feet (about 340 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2025 Mercedes-Benz GLB-Class
Running Costs: 2025 Mercedes-Benz GLB-Class
Covering around 8,000 miles a year in a 2025 Mercedes-Benz GLB-Class at 34 mpg combined, expect roughly 1,070 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $2,950 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Planning a road trip? Grab a road trip packing list. Only need this car occasionally? See our buy vs rent comparison.
2025 Mercedes-Benz GLB-Class Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
How It Compares
How does the Mercedes-Benz GLB-Class compare to similar estate/wagons? Estate/Wagons in our database average around 34 mpg (UK) combined — this model sits close to that average, within 0 mpg. Its 193 g/km CO₂ figure is 10 g/km lower than the 203 g/km average for estate/wagons on this site. This comparison is based on 194 estate/wagons in our dataset.
Mercedes-Benz models in our database average about 26 mpg (UK) combined on their most efficient configuration; the 2025 Mercedes-Benz GLB-Class's 34 mpg is 8 mpg above that make average. Its 193 g/km CO₂ figure is 75 g/km lower than the 268 g/km Mercedes-Benz average.
Of the 7 Mercedes-Benz GLB-Class model years we cover, the 2025 is the most economical on its best configuration (34 mpg UK combined). See every Mercedes-Benz GLB-Class year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2025 Mercedes-Benz GLB-Class
Frequently Asked Questions
What engine does the 2025 Mercedes-Benz GLB-Class have?
It's fitted with a 2L 4-cyl turbo premium gasoline engine, paired with a automatic (am8) transmission.
What is the fuel economy of the 2025 Mercedes-Benz GLB-Class?
The most efficient configuration returns around 34 mpg (UK) combined, or 28 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 28 to 34 mpg.
How much does the 2025 Mercedes-Benz GLB-Class cost to fuel per year?
The US EPA estimates about $2,950 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
How much interior and luggage space does the 2025 Mercedes-Benz GLB-Class have?
EPA measures interior passenger volume at 125 cubic feet (about 3,540 litres) and luggage volume at 12 cubic feet (about 340 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.
Is the Mercedes-Benz GLB-Class's fuel economy good for an estate/wagon?
It returns around 34 mpg (UK) combined, against a same-body-style average of roughly 34 mpg among the estate/wagons we track.