Mercedes-Benz GLB X247 (2020-present) reliability
Mercedes-Benz GLB X247 built around 2020: about average at the MOT
Mercedes-Benz GLB X247 models built around 2020 fail their MOT about as often as similar cars the same age.
Looking at a Mercedes-Benz GLB X247?
Enter its number plate to see its full MOT history, risk rating and running costs.
Key figure
10% of MOT tests on Mercedes-Benz GLB X247 models built around 2020 ended in a fail (retests included), against 12% for similar cars the same age.
Most common issue
The most common MOT issue on Mercedes-Benz GLB X247 models built around 2020 involves the tyres.
Based on 11,194 tests of GLB models registered 2020+.
About 1 in 10 diesel GLB cars registered in 2022 (9.6%) failed their first MOT.
Based on 833 first MOTs (DVSA MOT results, 2025).
About 1 in 50 GLB X247 MOTs (1.9%) failed and still hadn't passed 3 days later. That's for cars built around 2020 (5 years old), all fuels combined.
Based on 1,618 tests (DVSA MOT results, 2025). A fail that passed a retest within 3 days, even the same day, isn't counted. Nor is a fail with no later MOT on record.
About 1 in 30 GLB X247 MOTs (3.6%) found at least one dangerous defect. These are cars built around 2020 (5 years old).
Based on 1,618 tests (DVSA MOT results, 2025). Dangerous is the most serious grade an MOT gives: a direct risk to road safety.
X247 fail rate by age
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs. Highest fail rate at 5 years old.
How the GLB X247 compares
At each age below, see how the GLB X247 holds up against other cars the same age. The averages combine all fuel types.
Based on 124,145 tests across 22 Mercedes-Benz models, built around 2020 (5 years old).
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs.
What to check before viewing
The model's most common MOT issues, turned into things you can ask about or look for.
Brake pads
High priorityAsk when the pads were last replaced and check the warning-light history.
Brake discs
High priorityAsk for the date and mileage of the last disc replacement; visually check for a deep wear lip and rust pitting on each disc.
Tyres
Worth checkingCheck tread depth across the full width on all four; uneven wear suggests alignment or suspension issues.
Vehicle-specific check
Worth checkingCheck the car’s number plate on MOT Wise to see its own MOT history and any recalls for its build years.
Other SUVs to compare
Other SUVs, with each one's figures taken at the same age as the GLB X247.
- 1
Lexus RX
Same body type, tested at the same age
- Fail rate
- 4.9%
- Fail, no pass in 3 days
- 0.8%
- Dangerous
- 1.5%
- Still registered at 10 years
- 90.4%
Lower fail rate: 4.9%, against 10.3% for the Mercedes-Benz GLB X247, both built around 2020.
1,790 MOT tests on cars built around 2020
- 2
Lexus UX
Same body type, tested at the same age
- Fail rate
- 7.1%
- Fail, no pass in 3 days
- 0.6%
- Dangerous
- 2.3%
Lower fail rate: 7.1%, against 10.3% for the Mercedes-Benz GLB X247, both built around 2020.
4,133 MOT tests on cars built around 2020
- 3
Mitsubishi Eclipse
Same body type, tested at the same age
- Fail rate
- 12.3%
No clear edge over the Mercedes-Benz GLB X247 on these figures.
Some figures could not be compared for these two cars. So this comparison uses the fail rate and recalls only.
1,475 MOT tests on cars built around 2020
- 4
Porsche Macan
Same body type, tested at the same age
- Fail rate
- 6.5%
- Fail, no pass in 3 days
- 1.3%
- Dangerous
- 2.1%
- Still registered at 10 years
- 91.6%
Lower fail rate: 6.5%, against 10.3% for the Mercedes-Benz GLB X247, both built around 2020.
2 critical recall campaigns matching this model/build period.
4,146 MOT tests on cars built around 2020
- Fail rate
- = the share of MOT tests that ended in a fail. Retests count as tests.
- Fail, no pass in 3 days
- = the share of MOT tests that failed and still hadn't passed 3 days later. A fail that passed a retest within 3 days, even the same day, isn't counted.
- Dangerous
- = the share of MOT tests where the tester marked a fault as dangerous. It is against the law to drive the car until it is fixed.
- Still registered at 10 years
- = the share of cars still registered (taxed or declared off the road) 10 years after they were first registered.
Recall context
31 recalls in all17 of the 31 GLB X247 recalls cover cars built in these years.
- 17 recalls
Top concerns
- SRPC2610 - eCall function
- SRPC-2608 electric drive unit power electronics
- SRPC2418 – surface inner tyre side wall
For the exact car, check GOV.UK's recall checker with the number plate.
How GLB X247 cars have aged
How GLB X247 cars have aged
How fail rates have changed as these cars got older. Each line follows cars first registered in about the same year across several years of MOT data. Not a prediction for any one car.
Some lines cover only a year or two, so read this as a rough guide.
X247 variants compared
GLB X247 variants built around 2020
The fail rate for each GLB X247 variant, grouped by fuel. Each row counts fails per MOT test, the same way as the main fail rate chart.
Diesel
- GLB 220 AMG LINE PREM D 4M A9.8%911 tests
- GLB 200 AMG LINE PREMIUM D A9.4%276 tests
Most common issues on Mercedes-Benz GLB models of this age
This list covers every Mercedes-Benz GLB built around 2020, whichever generation it is. We don't have a defect list for the X247 on its own.
Most common advisories and fails
In order of the share of MOT tests that recorded each one
- 118.9%Advisory
Tyre worn close to the legal limit or worn on the edge
- 212.1%Advisory
Brake pads wearing thin
- 311.1%Advisory
Tyre slightly damaged, cracking or perishing
- 44.9%Advisory
Brake disc worn, but not excessively
- 54.6%Advisory
Brake disc worn, pitted or scored, but not seriously weakened
Based on 1,618 tests
Looking at a Mercedes-Benz GLB X247?
Enter its number plate to see its full MOT history, risk rating and running costs.
Frequently asked questions
Built around 2020 (5 years old), the Mercedes-Benz GLB X247 (2020-present) fails MOTs slightly less often than typical for this age. This is based on 1,618 5-year-old MOT tests from DVSA data. Each retest counts as a test.