Photo: Alexander Migl, CC BY-SA 4.0
Mercedes Benz
2,629 MOT tests analysed. sits above the UK fleet average — here's where Glb 200 Amg Line Autos pass, fail, and end up on the retest sheet.
That's 14.8 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
92.3%
Pass-after-fix
1.3%
Fail
6.1%
Avg miles
28,453
Pass + Pass-after-fix + Fail = 100%
Petrol cars first registered from January 2006 meet Euro 4 — compliant in London ULEZ, Birmingham CAZ, Bristol CAZ, and Glasgow LEZ.
Performance by cohort
2 year bands · 2,629 tests
Pass rate climbs 3.8 points across the cohorts — newer Glb 200 Amg Line Auto examples clear the test more reliably than the early cars.
Pass
88.9%
Fail
6.6%
PRS
4.2%
Avg mileage at test
33,018 mi
Pass
92.8%
Fail
6.1%
PRS
0.9%
Avg mileage at test
27,890 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 2,629 MOT tests, the Glb 200 Amg Line Auto returns 92.3% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is windscreen damage. A seriously damaged tyre and brake pads worn below 1.5 mm round out the top three. Average tested mileage sits at 28,453, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.
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Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
47 occurrences · 1.8% of tests
A tyre seriously damaged
43 occurrences · 1.6% of tests
a brake lining or pad worn below 1.5mm
24 occurrences · 0.9% of tests
Wiper blade defective
23 occurrences · 0.9% of tests
Brake lining or pad worn down to wear indicator
18 occurrences · 0.7% of tests
A tyre cords visible or damaged
12 occurrences · 0.5% of tests
Tyre tread depth not in accordance with the requirements
11 occurrences · 0.4% of tests
Wiper blade missing or obviously not clearing the windscreen
10 occurrences · 0.4% of tests
Number plate does not conform to the specified requirements
6 occurrences · 0.2% of tests
A wheel with a loose or missing wheel nut, bolt or stud
6 occurrences · 0.2% of tests
Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.
Worst-case fix budget · top 3 failures
£180–£365
If every one of this Glb 200 Amg Line Auto's most-logged Major fails hit at the same MOT, that's the real-world UK garage range. Reality is usually one or two items, not all of them. Open the estimator →
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Build your own retest budget.
Year-band analysis
First-time MOT pass rate split by registration band. A 3.9-point gap between bands means the year you buy Mercedes Benz Glb 200 Amg Line Auto has a real effect on what turns up at the garage.
Best band to buy
92.8%
2021+ registration
the 2021-on band climbs to 92.8% — a 3.9-point improvement. Tests in this band average 27,890 miles — roughly 5K miles fewer on the clock than the older band. Failures here are mostly wear items: has a cut in excess of the…, damaged but not adversely affecting driver's view — the structural issues that drag down older examples don't appear in the top-10 for this band. Post-2020 examples are early in their MOT life and generally show the cleanest records.
Band to be cautious about
88.9%
2018–2020 registration
On the 2018–2020 band, the data shows a 88.9% pass rate against a fleet average of 92.8% on the newer band. The main culprits logged at test: damaged but not adversely affecting driver's view, less than 1.5 mm thick, and inoperative or indicates a malfunction. Average mileage on test for this band is 33,018 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2021+ (92.8% first-time pass). Worst band to avoid: 2018-2020 (88.9% pass). That's a 3.9-point spread across 289 older tests and 2,340 newer ones — year of build makes a material difference on this model.
Picked against this car's top failure patterns. Affiliate links to Amazon UK — we earn a small cut at no cost to you. Disclosed up-front, doesn't shape the data.
Item 01 · Amazon UK
Brake pad measurement gauge
Testers fail pads under 1.5mm. A wear gauge tells you if you've got two months left or two weeks.
Search Amazon UK
Item 02 · Amazon UK
Bosch Aerotwin wiper blades
Cheap wipers fail the test on smear streaks. Bosch Aerotwins last a winter and clear a screen properly.
Search Amazon UK
My Motor World · affiliate
Affiliate links — small commission, no extra cost to you.
Click Mechanic · affiliate
Affiliate links — small commission, no extra cost to you.
Mobile mechanic · UK-wide
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Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.
If you own a Glb 200 Amg Line Auto and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.
