What is the MERCEDES-BENZ 420 MOT pass rate?
In the 2023–24 DVSA MOT file this nameplate passed 84.3% of 659 tests (544 passes, 101 fails). That is a test-outcome rate, not a prediction for any one car.
UK MOT · make×model
MERCEDES-BENZ 420
MOT pass rate.
Aggregated DVSA MOT tests for this nameplate in 2023–24. Average mileage is the mean recorded odometer on those tests, in miles. Top defects are the most frequent failure item groups in the derived summary — not a ranked reliability verdict.
Counts, not a score
544 passes · 101 fails
Snapshot generated 2026-08-24 from the compact derived MOT model summary. Duplicate MOT labels that share a URL slug were canonicalised to the higher-volume row. No per-test or per-VIN records are published.
Is a high MOT pass rate the same as reliability?
No. MOT tests a defined set of roadworthiness items at a point in time. They do not measure durability, crashworthiness, or US complaint volume. Sparse models (under 500 tests) are not published.
Are these UK or US figures?
UK. The rest of ModelYearFacts is US NHTSA and EPA evidence. This hub is Great Britain MOT statistics on the same nameplate, published under the Open Government Licence.
Most common MOT failure groups
01 · Failure groupLamps, reflectors and electrical equipment183 recorded items
02 · Failure groupBrakes135 recorded items
03 · Failure groupSuspension134 recorded items
04 · Failure groupBody, chassis, structure84 recorded items
05 · Failure groupVisibility62 recorded items
Pass rate by vehicle age
Age is years at test. Bands with fewer than 50 tests on this nameplate are omitted. These are extra fields on this hub, not separate URLs.
| Age (years) | Tests | Pass rate | Average mileage |
|---|---|---|---|
| 35 | 131 | 84.0% | 95,467 mi |
| 36 | 175 | 82.9% | 101,868 mi |
| 37 | 173 | 82.7% | 94,807 mi |
| 38 | 100 | 81.0% | 102,846 mi |