Mercedes-Benz CLC 2009: MOT failure rate for its age

44.3% of 16,692 MOT tests of the Mercedes-Benz CLC first registered in 2009 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 102.4 (95% CI 100.1–104.7; 100 = normal for this model at that age): close to other build years of the same model at the same age (within 5 points of normal).

Mercedes-Benz CLC built in 2009 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	44.3	%	all ages tested	2019–2024	16692
Index against this model at the same age (95% CI 100.1–104.7)	102.4	index	100 = normal for this model at that age	2019–2024	16692
Rank among this model's 4 build years	3	of 4	1 = fails least for its age	2019–2024	16692
Tested in 2024	3266	tests	median 100,144 miles	2024	3266

Built 2009 against Mercedes-Benz CLC normal for the age: first-time MOT failure share at each age, age 10: 41.9% vs 42.9%; age 11: 41.8% vs 42%; age 12: 44.8% vs 43.3%; age 13: 44.5% vs 43.4%; age 14: 44.9% vs 42.9%; age 15: 44.6% vs 44.1%. Axis from 0% to 50%. DVSA MOT bulk data, 2019–2024.

Check a 2009 Mercedes-Benz CLC by registration · All Mercedes-Benz CLC MOT statistics · Download the build-year table (CSV)

Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).

How does the 2009 Mercedes-Benz CLC fail at each age?

Cars built in 2009 were tested at ages 10 to 15 between 2019 and 2024. Each row compares their first-time failure share with what this model normally shows at that age, after allowing for the overall failure level of each test year.

Mercedes-Benz CLC built 2009: first-time MOT failure by age, against the model's normal rate at that age (2019–2024)
Age	Tests	Failed, %	95% interval	Normal for this model at that age, %	Index (100 = normal)
10	1,291	41.9	39.2–44.6	42.9	97.6
11	1,205	41.8	39.1–44.6	42	99.6
12	3,699	44.8	43.2–46.4	43.3	103.5
13	3,685	44.5	42.9–46.1	43.4	102.6
14	3,546	44.9	43.3–46.5	42.9	104.8
15	3,266	44.6	42.9–46.3	44.1	101.3

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 16,692 (initial tests) · Method: normal rate = this model's first-time failure share at that age across its build years (cells of 400+ tests), adjusted for each test year's overall level; cells of 30+ tests, under 500 marked rough · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

What fails most on the 2009 Mercedes-Benz CLC?

The most common failure group on cars built in 2009 is suspension: 45.1 items per 100 first tests, against 44 across all build years of the Mercedes-Benz CLC. These counts are not age-adjusted: cars built in 2009 were tested at ages 10 to 15.

Failure items per 100 first tests, Mercedes-Benz CLC built 2009 against the Mercedes-Benz CLC in all build years (2019–2024, not age-adjusted)
Failure group	Built 2009, per 100	All build years, per 100	Items
Suspension	45.1	44	7,520
Lamps, reflectors and electrical equipment	28.5	27.9	4,761
Brakes	18.6	17.7	3,097
Tyres	14.1	14	2,357
Visibility	12.9	11.7	2,149

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 16,692 (initial tests of this build year) · Method: failure items grouped by DVSA's top-level defect groups, per 100 initial tests; groups with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

How does 2009 compare with the years around it?

Among the 4 published build years of the Mercedes-Benz CLC, 2009 ranks 3 (1 = fails least for its age). 2008: index 103.7. 2010: index 100.0.

Mercedes-Benz CLC build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2008	103.7	100.9–106.5	worse	11,357
2009	102.4	100.1–104.7	worse	16,692
2010	100.0	97.3–102.6	no different	12,747
2011	88.9	83.4–94.5	better (rough estimate)	2,712

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 43,508 (initial tests) · Method: observed failures against those expected for the same model at the same ages, test-year level adjusted; verdict follows the printed one-decimal bound · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

How to cite this page

MOT Risk Index (2026). Mercedes-Benz CLC 2009 MOT statistics (data release dvsa-2024-v2; full dataset motriskindex-families-2024-v5, DOI 10.5281/zenodo.22975051), updated 30 September 2026. motriskindex.co.uk/cars/mercedes-clc/2009/

How every figure is calculated: methodology. Age, test year and build year are tied together (age = test year − build year), so the test-year level is taken as observed, not estimated.

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