2020 Mercedes-Benz GLB-Class — Full Specifications
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The 2020 Mercedes-Benz GLB-Class is an SUV powered by a 2L 4-cyl turbo premium gasoline engine. It returns around 31 mpg (UK) / 26 mpg (US EPA) combined. Owners often keep a Mercedes-Benz GLB-Class workshop manual to hand for servicing and repairs.
Full Specifications
| Engine | 2L 4-cyl turbo |
|---|---|
| Transmission | Automatic (AM8) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | 4-Wheel Drive |
| Body Style | SUV |
| Fuel Economy (UK) | 31 combined / 28 urban / 37 extra-urban mpg |
| Fuel Economy (US EPA) | 26 combined / 23 city / 31 highway mpg |
| CO₂ Emissions | 210 g/km |
| EPA Greenhouse Gas Score | 5 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,150 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2020 Mercedes-Benz GLB-Class, all with the 2L 4-cyl turbo engine. 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 | Automatic (AM8) | 4-Wheel Drive | 31 | 26 (23/31) | 210 | $3,150 |
| 2L 4-cyl turbo | Automatic (AM8) | Front-Wheel Drive | 31 | 26 (23/30) | 214 | $3,150 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
Owner Essentials for the 2020 Mercedes-Benz GLB-Class
Running Costs: 2020 Mercedes-Benz GLB-Class
Covering around 8,000 miles a year in a 2020 Mercedes-Benz GLB-Class at 31 mpg combined, expect roughly 1,173 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,150 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.
2020 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.
Recalls & Owner Complaints (NHTSA)
NHTSA lists no safety recall campaigns for the 2020 Mercedes-Benz GLB-Class as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
Owners have filed 61 complaints with NHTSA about the 2020 Mercedes-Benz GLB-Class. The most-reported areas are Structure (15), Electrical system (12), Unspecified (12). Complaints include 3 reported crashes, 1 reported fire, 3 reported injuries. That is well above the median of 13 complaints across the 4 Mercedes-Benz GLB-Class model years in our data.
Used-buyer checklist for the 2020 Mercedes-Benz GLB-Class
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Body structure (15 owner complaints) — Inspect for corrosion and for subframe or body-panel damage, especially underneath.
- Electrical system (12 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
- Engine (9 owner complaints) — Listen for unusual noise on a cold start, check for warning lights and ask for the service records.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
How does the Mercedes-Benz GLB-Class compare to similar SUVs? For context, SUVs in our database average around 27 mpg (UK) combined — this model's 31 mpg figure is 4 mpg better than that average. Its 210 g/km CO₂ figure is 43 g/km lower than the 253 g/km average for SUVs on this site. This comparison is based on 1824 SUVs in our dataset.
Mercedes-Benz models in our database average about 26 mpg (UK) combined on their most efficient configuration; the 2020 Mercedes-Benz GLB-Class's 31 mpg is 5 mpg above that make average. Its 210 g/km CO₂ figure is 58 g/km lower than the 268 g/km Mercedes-Benz average.
Of the 7 Mercedes-Benz GLB-Class model years we cover, the 2020 ranks 6th for combined fuel economy on its best configuration (31 mpg UK combined, against a high of 34 mpg). 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 2020 Mercedes-Benz GLB-Class
Frequently Asked Questions
What engine does the 2020 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 2020 Mercedes-Benz GLB-Class?
The most efficient configuration returns around 31 mpg (UK) combined, or 26 mpg on the US EPA cycle.
How much does the 2020 Mercedes-Benz GLB-Class cost to fuel per year?
The US EPA estimates about $3,150 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.
Does the 2020 Mercedes-Benz GLB-Class have any recalls?
NHTSA lists no safety recall campaigns for the 2020 Mercedes-Benz GLB-Class as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
What are the most common problems reported for the 2020 Mercedes-Benz GLB-Class?
Among the 61 owner complaints filed with NHTSA, the most-reported areas are Structure (15 complaints), Electrical system (12 complaints), Unspecified (12 complaints). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
Is the Mercedes-Benz GLB-Class's fuel economy good for an SUV?
Yes — it returns around 31 mpg (UK) combined, against a same-body-style average of roughly 27 mpg among the SUVs we track, making it one of the more efficient options in its class.