Photo: Alexander Migl, CC BY-SA 4.0
Mercedes Benz
1,545 MOT tests analysed. sits above the UK fleet average — here's where Gla 200 Sport Executive Autos pass, fail, and end up on the retest sheet.
That's 17.0 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
94.5%
Pass-after-fix
1.2%
Fail
4.1%
Avg miles
24,764
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 · 1,545 tests
Pass rate is broadly flat across the cohorts — new and old Gla 200 Sport Executive Auto examples track each other at the test bay.
Pass
94.0%
Fail
5.1%
PRS
0.7%
Avg mileage at test
27,449 mi
Pass
94.9%
Fail
3.3%
PRS
1.7%
Avg mileage at test
22,415 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 1,545 MOT tests, the Gla 200 Sport Executive Auto returns 94.5% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a seriously damaged tyre. A defective wiper blade and windscreen damage round out the top three. Average tested mileage sits at 24,764, 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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A tyre seriously damaged
34 occurrences · 2.2% of tests
Wiper blade defective
13 occurrences · 0.8% of tests
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
10 occurrences · 0.6% of tests
Tyre tread depth not in accordance with the requirements
10 occurrences · 0.6% of tests
A wheel with a loose or missing wheel nut, bolt or stud
6 occurrences · 0.4% of tests
Wiper blade missing or obviously not clearing the windscreen
5 occurrences · 0.3% of tests
A tyre cords visible or damaged
5 occurrences · 0.3% of tests
A tyre seriously damaged
4 occurrences · 0.3% of tests
Seat belt buckle missing, damaged or not functioning as intended
2 occurrences · 0.1% of tests
A lens defective which has no effect on emitted light
2 occurrences · 0.1% 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 2 failures
£80–£140
If every one of this Gla 200 Sport Executive 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. Pass rates barely move across bands here, so the year you buy Mercedes Benz Gla 200 Sport Executive Auto makes little measurable difference to MOT outcomes.
Best band to buy
94.9%
2021+ registration
the 2021-on band climbs to 94.9% — a 0.9-point improvement. Tests in this band average 22,415 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…, blade defective — 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
94.0%
2018–2020 registration
On the 2018–2020 band, the data shows a 94.0% pass rate against a fleet average of 94.9% on the newer band. The main culprits logged at test: has a cut in excess of the…, damaged but not adversely affecting driver's view, and blade defective. Average mileage on test for this band is 27,449 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2021+ (94.9% first-time pass). Worst band to avoid: 2018-2020 (94.0% pass). That's a 0.9-point spread across 721 older tests and 824 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
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
Item 02 · Amazon UK
Digital tyre-tread depth gauge
Five quid for a gauge beats £150 for a retest. UK MOT minimum is 1.6mm — most testers fail anything below 2mm to be safe.
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 Gla 200 Sport Executive 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.
