Mercedes Benz
Glc 300 Sport 4matic Auto
1,319 MOT tests analysed. sits above the UK fleet average — here's where Glc 300 Sport 4matic 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
0.8%
Fail
6.1%
Avg miles
31,373
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.
The picture
Glc 300 Sport 4matic Auto: a strong MOT record by UK norms
Across 715 MOT tests, the Glc 300 Sport 4matic Auto returns 93.2% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a seriously damaged tyre. Windscreen damage and a defective wiper blade round out the top three. Average tested mileage sits at 23,858, 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
Group 32–44
A high-group car — insurance costs will be significantly above average. 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 →
32–44
out of 50
Top ten reasons for rejection.
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- 01
A tyre seriously damaged
35 occurrences · 2.7% of tests
- 02
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
26 occurrences · 2.0% of tests
- 03
A lens defective which has no effect on emitted light
15 occurrences · 1.1% of tests
- 04
A tyre cords visible or damaged
13 occurrences · 1.0% of tests
- 05
Tyre tread depth not in accordance with the requirements
11 occurrences · 0.8% of tests
- 06
Wiper blade defective
9 occurrences · 0.7% of tests
- 07
Wiper blade missing or obviously not clearing the windscreen
5 occurrences · 0.4% of tests
- 08
A suspension pin, bush or joint excessively worn
5 occurrences · 0.4% of tests
- 09
a brake lining or pad worn below 1.5mm
3 occurrences · 0.2% of tests
- 10
The aim of a headlamp is not within limits laid down in the requirements
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 2 failures
£120–£190
If every one of this Glc 300 Sport 4matic 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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Buying or keeping a Glc 300 Sport 4matic Auto?
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 Glc 300 Sport 4matic 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.