MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO (2020)
Running costs, reliability data, and common problems from 55 real MOT tests.
Annual Cost
£1,777
£148/month
MOT Pass Rate
98%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 18-32
1991cc Petrol
Great Choice
98% pass rate, £1777/year to run. 16 points above average.
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Annual Running Costs
~36 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 16 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 6 years old, 98% of MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTOs from 2020 passed their MOT first time in 2026. That's based on 55 tests across the UK. The average mileage at this age is 30,425 miles.
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How Does It Compare?
Mileage Analysis
30,425
Average miles
44,400
Expected for age
The average 2020 MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO has 30,425 miles on the clock, which is below the expected 44,400 miles for a 6-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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Best Year to Buy?
The most reliable year is the 2021 model with a 100% MOT pass rate, while the 2020 model has the lowest at 98%. Consider a different year if reliability is a priority.
MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO by Year
Similar Cars to Consider
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About the 2020 MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO
The 2020 MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO is a family car with a 1991cc petrol engine. 55 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 6% of all 2020 cars for reliability.
With an average of 30,425 miles at 6 years old, MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO owners tend to use this car less than the typical driver.
2020 MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO Fuel Costs
The 1991cc petrol engine offers a reasonable balance between performance and economy. Expect around 36 mpg in mixed driving, which works out to roughly £1,327 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2020 MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO?
Total estimated annual running cost is £1,777 (£148/month), broken down as £1327 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 98% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2020 MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO
At 6 years old, the MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. Note: with only 55 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2020 MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 6 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2020 MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MERCEDES AMG GLB 35 PREMIUM 4MATIC AUTO(2020) | 98% | £1327 | £195 | Grp 18-32 | £1777 |
| VOLKSWAGEN GOLF(2019) | 92% | £1137 | £190 | Grp 12-25 | £1582-£195 |
| FORD KUGA(2018) | 90% | £1137 | £190 | Grp 12-25 | £1582-£195 |
| MINI COOPER(2018) | 92% | £1137 | £190 | Grp 12-25 | £1582-£195 |
| NISSAN QASHQAI(2020) | 93% | £1137 | £190 | Grp 12-25 | £1582-£195 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Mercedes Models
Explore other Mercedes cars or similar models in the same category.
MERCEDES A
2019 · 1461cc Diesel
MERCEDES C
2017 · 1991cc Hybrid
MERCEDES A-CLASS
2017 · 1461cc Diesel
VOLKSWAGEN GOLF
2019 · 1498cc Petrol
FORD KUGA
2018 · 1499cc Petrol
MINI COOPER
2018 · 1499cc Petrol
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