Mercedes Benz 230 MOT Failures
An analysis of 13,534 real DVSA MOT tests on the Mercedes Benz 230 — what fails, how often, and how that compares to every other car on UK roads.
Where the Mercedes Benz 230 fails its MOT
The single biggest MOT failure point on the Mercedes Benz 230 is free play in the steering, measured at the rim ... — this model is 502 times more likely to fail on this item than the average car on UK roads. That makes it an extreme outlier for anyone buying or owning this model. Across 13,534 MOT tests, 9.1% of all Mercedes Benz 230 tests recorded this as a failure.
Steering faults include worn track rod ends, power steering leaks, and rack wear. These are safety-critical — any play in the steering should be investigated immediately.
Other notable weak points include emissions failure (199x the fleet average), track rod ends worn (22x the fleet average), brake hoses perished or damaged (16x the fleet average), and electrical wiring fault (29x the fleet average). These ratios compare the Mercedes Benz 230's failure rate on each item against the national average for all cars tested — a ratio of 10x means this model fails ten times more often than a typical car.
The failures span 6 categories: Steering, Exhaust & Emissions, Brakes, Lights & Electrics, Suspension and others. If you're inspecting a Mercedes Benz 230 before purchase, these are the areas to focus on — and if any have been flagged as advisories on a previous MOT, they're likely to become failures in the near future.
How failures change with mileage
The Mercedes Benz 230's weak points shift as the car covers more miles. Understanding these patterns helps you know what to expect — and what to budget for — at each stage of ownership.
Under 60,000 miles
At this mileage, most failures are either design-related or caused by age rather than wear. Components like bushes and drop links may not have been replaced yet, and original-fit parts can deteriorate even on low-mileage cars that spend a lot of time sitting.
For the Mercedes Benz 230 specifically, the DVSA data shows the most common failures at this mileage are wheel bearings worn (23x the average) and brake hoses perished or damaged (16x). exhaust system damage (7.2x) and coil springs broken (5.6x) also appear frequently.
60,000 to 100,000 miles
This is where routine wear items start to show up. Brake components, tyres, and exhaust parts have done serious work by this point. Cars that have been well serviced will show fewer of these failures — this mileage band is where good maintenance really separates the well-kept from the neglected.
For the Mercedes Benz 230 specifically, the DVSA data shows the most common failures at this mileage are free play in the steering, measured at the rim ... (502x the average) and emissions failure (135x). electrical wiring fault (29x) and vehicle structure corroded to the extent that t... (12x) also appear frequently.
Over 100,000 miles
High-mileage cars accumulate failures across multiple systems. The key question isn't whether things will need doing — they will — but whether the car has been maintained well enough to keep on top of them. Look for a consistent service history and recent MOT passes with minimal advisories.
For the Mercedes Benz 230 specifically, the DVSA data shows the most common failures at this mileage are emissions failure (199x the average) and free play in the steering, measured at the rim ... (56x). track rod ends worn (15x) and transmission shaft flexible coupling deteriorated (12x) also appear frequently.
The shift from wheel bearings worn at lower mileages to emissions failure at higher mileages is typical — early failures tend to be design or factory-related, while high-mileage failures reflect accumulated mechanical wear. A car that's been well maintained will usually dodge the worst of both.
What to check before buying a Mercedes Benz 230
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Mercedes Benz 230:
Steering — check for free play in the steering, measured at the rim ..., track rod ends worn. Exhaust & Emissions — check for emissions failure. Brakes — check for brake hoses perished or damaged.
Always check the car's full MOT history for patterns — recurring advisories often become failures within 12 months. Enter any reg into our free car check to see the complete picture.
Looking at a specific Mercedes Benz 230?
Enter the reg to see its full MOT history, mileage records, write-off status, and finance checks.
Mercedes Benz 230 MOT FAQs
What are the most common MOT failures on a Mercedes Benz 230?
Based on 13,534 DVSA MOT tests, the most common failure is free play in the steering, measured at the rim ... — at 502x the national fleet average. Other frequent failures include emissions failure and track rod ends worn.
Is the Mercedes Benz 230 reliable based on MOT data?
The Mercedes Benz 230 has 17 categories where it fails more often than average. The main concern is free play in the steering, measured at the rim .... Always check a specific car's full history before buying.
What MOT failures should I expect at high mileage?
Above 100,000 miles, the Mercedes Benz 230 most commonly fails on emissions failure and free play in the steering, measured at the rim .... Under 60,000 miles, the main issues are wheel bearings worn and brake hoses perished or damaged.
How do I check a Mercedes Benz 230's MOT history?
Enter the registration number into our free car check above. You'll see every MOT test result, advisories and failures, mileage readings, write-off status, and finance checks.
MOT failure data sourced from DVSA bulk test records via data.gov.uk. Ratios compare this model's failure rate against the national fleet average. Known issues sourced from manufacturer bulletins, specialist workshops, and verified owner reports.