Mercedes Benz
1,535 MOT tests analysed. sits above the UK fleet average — here's where Gla 200 Amg Line Autos pass, fail, and end up on the retest sheet.
That's 14.9 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
92.4%
Pass-after-fix
1.8%
Fail
5.5%
Avg miles
28,044
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 · 1,535 tests
Pass rate climbs 2.1 points across the cohorts — newer Gla 200 Amg Line Auto examples clear the test more reliably than the early cars.
Pass
91.5%
Fail
6.2%
PRS
2.3%
Avg mileage at test
29,381 mi
Pass
93.6%
Fail
4.6%
PRS
1.1%
Avg mileage at test
26,229 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 492 MOT tests, the Gla 200 Amg Line Auto returns 89.6% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is tyre tread under the limit. A defective wiper blade and a seriously damaged tyre round out the top three. Average tested mileage sits at 22,885, 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
18 occurrences · 1.2% of tests
Wiper blade defective
14 occurrences · 0.9% of tests
a brake lining or pad worn below 1.5mm
14 occurrences · 0.9% of tests
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
12 occurrences · 0.8% of tests
A spring or spring component fractured or seriously weakened
9 occurrences · 0.6% of tests
Wiper blade missing or obviously not clearing the windscreen
7 occurrences · 0.5% of tests
Tyre tread depth not in accordance with the requirements
7 occurrences · 0.5% of tests
A tyre cords visible or damaged
4 occurrences · 0.3% of tests
Number plate missing or so insecure that it is likely to fall off
4 occurrences · 0.3% of tests
Brake lining or pad worn down to wear indicator
3 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–£445
If every one of this Gla 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 2.1-point gap between bands is modest — the year you buy Mercedes Benz Gla 200 Amg Line Auto makes a small but real difference to MOT outcomes.
Best band to buy
93.6%
2021+ registration
the 2021-on band climbs to 93.6% — a 2.1-point improvement. Failures here are mostly wear items: blade defective, 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
91.5%
2018–2020 registration
On the 2018–2020 band, the data shows a 91.5% pass rate against a fleet average of 93.6% 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 29,381 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2021+ (93.6% first-time pass). Worst band to avoid: 2018-2020 (91.5% pass). That's a 2.1-point spread across 881 older tests and 654 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
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
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 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.
