Mercedes GLB 200 AMG Line Premium Auto (2021)
Estimated running costs and MOT pass rates from 1,218 MOT tests in 2024.
Annual Cost
£1,853
£154/month
MOT Pass Rate
95%
Excellent
Road Tax
£200
Standard rate/year
Est. Insurance
Grp 8-20
1332cc Petrol
Great Choice
95% pass rate, £1,853/year to run. 13 points above average.
Check a specific Mercedes GLB 200 AMG Line Premium Auto
Enter a reg plate for full MOT history, mileage check, health score, running costs, and reliability data. Free, instant, no signup.
Annual Running Costs
~42 mpg
Standard rate (from April 2017)
Low estimate due to excellent reliability
Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).
Reliability Verdict
Excellent reliability. Very few MOT failures. That's 13 points above the average of 82% across all models in our data. It also outperforms the Mercedes brand average of 87%.
95% of MOT tests on Mercedes GLB 200 AMG Line Premium Autos from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 1,218 tests across the UK, retests included. The average mileage recorded at those tests was 26,956 miles.
Got a Mercedes GLB 200 AMG Line Premium Auto you're looking at?
Enter the reg plate to check its specific MOT history, mileage, and health score.
How Does It Compare?
Mileage Analysis
26,956
Average miles
22,200
Expected for age
The average 2021 Mercedes GLB 200 AMG Line Premium Auto had 26,956 miles on the clock at its 2024 MOT, which is above the expected 22,200 miles for a 3-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Looking at a specific Mercedes GLB 200 AMG Line Premium Auto?
Enter its reg plate for a free check with full MOT history, mileage verification, and predicted costs.
Mercedes GLB 200 AMG Line Premium Auto by Year
Similar Cars to Consider
Check a Specific Mercedes GLB 200 AMG Line Premium Auto
Enter a reg plate to get the full MOT history, health score, and mileage verification.
Upgrade to Premium (£4.99) for stolen, finance, and write-off checks.
About the 2021 Mercedes GLB 200 AMG Line Premium Auto
The 2021 Mercedes GLB 200 AMG Line Premium Auto is a premium car. Our records list a 1332cc petrol engine, though engines vary between versions. 1,218 MOT tests were recorded on this model in 2024, making it a reasonably common sight on UK roads. It ranks in the top 24% of all 2021 models for MOT pass rate.
With an average of 26,956 miles recorded at its 2024 MOT tests, Mercedes GLB 200 AMG Line Premium Auto owners cover more miles than the average driver.
2021 Mercedes GLB 200 AMG Line Premium Auto Fuel Costs
The 1332cc petrol engine offers a reasonable balance between performance and economy. Expect around 42 mpg in mixed driving, which works out to roughly £1,398 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).
What does it cost to own a 2021 Mercedes GLB 200 AMG Line Premium Auto?
Total estimated annual running cost is £1,853 (£154/month), broken down as £1,398 fuel, £200 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 95% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 2021 Mercedes GLB 200 AMG Line Premium Auto
At 5 years old, the Mercedes GLB 200 AMG Line Premium Auto offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Common Issues to Watch For
These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.
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 2021 Mercedes GLB 200 AMG Line Premium Auto stacks up against similar cars for estimated annual running costs, insurance group, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Est. Ins. Group | Total/yr |
|---|---|---|---|---|---|
| Mercedes GLB 200 AMG Line Premium Auto(2021) | 95% | £1,398 | £200 | Grp 8-20 | £1,853 |
| Ford Fiesta(2019) | 91% | £1,175 | £200 | Grp 1-8 | £1,630-£223 |
| Volkswagen Golf(2019) | 92% | £1,398 | £200 | Grp 12-25 | £1,853same |
| Vauxhall Corsa(2019) | 88% | £1,398 | £200 | Grp 8-20 | £2,003+£150 |
| Nissan Qashqai(2020) | 93% | £1,398 | £200 | Grp 12-25 | £1,853same |
Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.
Questions about the 2021 Mercedes GLB 200 AMG Line Premium Auto
Is the 2021 Mercedes GLB 200 AMG Line Premium Auto reliable?
Excellent reliability. Very few MOT failures. 95% of MOT tests on 2021 Mercedes GLB 200 AMG Line Premium Autos ended in a pass, from 1,218 tests (DVSA MOT data for tests in 2024, retests included). That's 13 points above the average of 82% across all models in the same data.
How much does a 2021 Mercedes GLB 200 AMG Line Premium Auto cost to run?
Our estimate is £1,853 a year (£154 a month): £1,398 fuel, £200 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.
What is the MOT pass rate for a 2021 Mercedes GLB 200 AMG Line Premium Auto?
95% of 1,218 MOT tests on the 2021 Mercedes GLB 200 AMG Line Premium Auto ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 781st of 3,336 models first registered in 2021 (top 24%).
Which year Mercedes GLB 200 AMG Line Premium Auto has the best MOT pass rate?
Of the years with at least 100 tests, the 2021 Mercedes GLB 200 AMG Line Premium Auto has the highest MOT pass rate at 95% and the 2020 the lowest at 92%. Newer cars usually pass more often simply because they are younger and have done fewer miles.
What is the average mileage for a 2021 Mercedes GLB 200 AMG Line Premium Auto?
The average mileage recorded at MOT tests on the 2021 Mercedes GLB 200 AMG Line Premium Auto is 26,956 miles, which is above the expected 22,200 miles for a 3-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
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
Ford Fiesta
2019 · 998cc Petrol
Volkswagen Golf
2019 · 1498cc Petrol
Vauxhall Corsa
2019 · 1398cc Petrol
Related Guides
In-depth articles relevant to the Mercedes GLB 200 AMG Line Premium Auto.
Cars That Lose Value Fastest: Models to Avoid for Depreciation
8 min read
Running CostsCheapest Cars to Run in 2026: Running Costs From DVSA MOT Data
9 min read
Reliability20 Most Reliable Used Cars UK 2026: Real MOT Pass Rate Rankings
10 min read
Buying GuideFord Fiesta Common Problems (2026): What to Check Before Buying
13 min read
ReliabilityFord Puma Common Problems: 7 Issues That Could Cost £1,500+ (2026)
13 min read
Check a specific Mercedes GLB 200 AMG Line Premium Auto
Enter the reg to see its MOT history, mileage check, and predicted costs.
Premium History Check
Buying a Mercedes GLB 200 AMG Line Premium Auto? Our premium check covers:
- Stolen check (PNC)
- Outstanding finance
- Write-off history (Cat A/B/N/S)
- Previous owners count
With outstanding finance included