Mercedes Benz
1,829 MOT tests analysed. sits above the UK fleet average — here's where Gla 200 Amg Line Premium Autos pass, fail, and end up on the retest sheet.
That's 16.6 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
94.2%
Pass-after-fix
0.7%
Fail
4.8%
Avg miles
24,732
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 · 1,829 tests
Pass rate climbs 3.9 points across the cohorts — newer Gla 200 Amg Line Premium Auto examples clear the test more reliably than the early cars.
Pass
92.1%
Fail
6.1%
PRS
1.3%
Avg mileage at test
27,698 mi
Pass
96.0%
Fail
3.6%
PRS
0.2%
Avg mileage at test
22,009 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 491 MOT tests, the Gla 200 Amg Line Premium Auto returns 88.8% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a defective wiper blade. A broken or weak spring and tyre tread under the limit round out the top three. Average tested mileage sits at 21,706, 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.
ABI Insurance Group
Above average — worth comparing quotes before buying. Lower groups cost less to insure; UK fleet average is around Group 22.
Source: ABI Group Rating Panel · administered by Thatcham Research · groups cover standard variants; performance trims may sit higher. Browse all insurance groups →
22–36
out of 50
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A tyre seriously damaged
23 occurrences · 1.3% of tests
Wiper blade defective
17 occurrences · 0.9% of tests
Tyre tread depth not in accordance with the requirements
15 occurrences · 0.8% of tests
A spring or spring component fractured or seriously weakened
12 occurrences · 0.7% of tests
a brake lining or pad worn below 1.5mm
12 occurrences · 0.7% of tests
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
8 occurrences · 0.4% of tests
Wiper blade missing or obviously not clearing the windscreen
6 occurrences · 0.3% of tests
Brake lining or pad worn down to wear indicator
5 occurrences · 0.3% of tests
Tyre tread depth not in accordance with the requirements
5 occurrences · 0.3% of tests
Brake disc or drum significantly and obviously worn
4 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 4 failures
£240–£540
If every one of this Gla 200 Amg Line Premium 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 Gla 200 Amg Line Premium Auto has a real effect on what turns up at the garage.
Best band to buy
96.0%
2021+ registration
the 2021-on band climbs to 96.0% — a 3.9-point improvement. Tests in this band average 22,009 miles — roughly 6K 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
92.1%
2018–2020 registration
On the 2018–2020 band, the data shows a 92.1% pass rate against a fleet average of 96.0% on the newer band. The main culprits logged at test: has a cut in excess of the…, less than 1.5 mm thick, and blade defective. Average mileage on test for this band is 27,698 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2021+ (96.0% first-time pass). Worst band to avoid: 2018-2020 (92.1% pass). That's a 3.9-point spread across 875 older tests and 954 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
Item 03 · 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
My Motor World · affiliate
Affiliate links — small commission, no extra cost to you.
Click Mechanic · affiliate
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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 Amg Line Premium 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.
