Mercedes-Benz 350
From 567 MOT tests. Above average for its class.
Common MOT failure categories
What goes wrong?
The most common MOT failure reasons are a floor excessively deteriorated or insecure, the strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired and significant brake effort recorded with no brake applied indicating a binding brake. The top issue, a floor excessively deteriorated or insecure, caused 13 failures in 2024. If you need repairs before retesting, sites like BookMyGarage let you compare local prices.
| a floor excessively deteriorated or insecure | 13 |
| the strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired | 12 |
| significant brake effort recorded with no brake applied indicating a binding brake | 12 |
| a wheel with a loose or missing wheel nut, bolt or stud | 12 |
| a spring or spring component fractured or seriously weakened | 10 |
| windscreen washers not working or not providing sufficient fluid to clear the windscreen | 10 |
| emissions levels exceed default limits | 10 |
| a suspension joint dust cover missing or no longer prevents the ingress of dirt etc | 9 |
| the aim of a headlamp is not within limits laid down in the requirements | 9 |
| vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced | 9 |
How serious are these failures?
Not all MOT failures are equal. 29.2% of 350 failures could actually strand you: fractured springs, engine faults, exhaust problems. Another 11.3% are safety issues where the car still drives but shouldn't, such as worn brakes, corroded brake pipes, and steering wear. Breakdown cover may be worth considering for this model. When it does fail, the average repair bill is around £133.
Typical mileage
Half of all 350s tested had between 42,390 and 109,758 miles on the clock. A significant number are high-mileage vehicles.
At 77,904 median miles, the 350 has 0.023 failures per 10,000 miles driven.
Other Mercedes-Benz models
Common questions
What is the Mercedes-Benz 350 MOT pass rate?
The Mercedes-Benz 350 has a 82.4% MOT pass rate based on 567 real MOT tests. This is above the national average.
What are common MOT failures on a Mercedes-Benz 350?
The most common MOT failure on the Mercedes-Benz 350 is a floor excessively deteriorated or insecure, which caused 13 failures. Other common issues include the strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired.
What is the typical mileage of a Mercedes-Benz 350 at MOT?
The median mileage at MOT for a Mercedes-Benz 350 is 77,904 miles. The middle 50% of vehicles tested have between 42,390 and 109,758 miles.
Buying a used 350?
Start with the free tools. Look up the specific vehicle's MOT history on GOV.UK The mileage at each test will show if it's been wound back, and the advisory history tells you what's wearing. Cross-reference that against the typical failures above to see if anything looks unusual for this model.
The free data won't tell you about outstanding finance, theft markers, or write-off history. For that, you need a vehicle history check This is especially important on a private sale where you have fewer legal protections.
With a 82.4% pass rate and an average repair bill of £133 when things go wrong, budget accordingly. 29.2% of failures on this model could actually strand you, so breakdown cover may be worth considering.
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MOT data from DVSA anonymised test results, 2024 test year. Fleet data from DfT vehicle licensing statistics. Crown copyright, OGL v3.0. MOT pass rates are statistical summaries of test outcomes, not assessments of individual vehicle safety or condition. Always inspect a vehicle and check its full MOT history before purchasing. See terms of use.