Mercedes Benz 280 MOT Failures
An analysis of 9,722 real DVSA MOT tests on the Mercedes Benz 280 — what fails, how often, and how that compares to every other car on UK roads.
Where the Mercedes Benz 280 fails its MOT
The single biggest MOT failure point on the Mercedes Benz 280 is fluid leak — this model is 24 times more likely to fail on this item than the average car on UK roads. That makes it a significant weak point for anyone buying or owning this model. Across 9,722 MOT tests, 20.62% of all Mercedes Benz 280 tests recorded this as a failure.
Exhaust and emissions failures often point to catalytic converter degradation, lambda sensor faults, or — in diesel models — DPF problems. These can be expensive to fix and will cause an immediate MOT failure.
Other notable weak points include free play in the steering, measured at the rim ... (274x the fleet average), wheel bearings worn (55x the fleet average), subframe bushes or mounts worn (18x the fleet average), and emissions failure (181x the fleet average). These ratios compare the Mercedes Benz 280'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 4 categories: Exhaust & Emissions, Steering, Suspension, Bodywork. If you're inspecting a Mercedes Benz 280 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 280'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 280 specifically, the DVSA data shows the most common failures at this mileage are wheel bearings worn (55x the average) and exhaust system damage (25x). fluid leak (24x) and coil springs broken (8.5x) 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 280 specifically, the DVSA data shows the most common failures at this mileage are free play in the steering, measured at the rim ... (274x the average) and subframe bushes or mounts worn (18x). body, cab or chassis corroded at a mounting point (15x) and wheel bearings worn (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 280 specifically, the DVSA data shows the most common failures at this mileage are emissions failure (128x the average) and free play in the steering, measured at the rim ... (73x). tyre valve seriously damaged or misaligned (35x) and structural corrosion (9.8x) 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 280
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Mercedes Benz 280:
Exhaust & Emissions — check for fluid leak, emissions failure. Steering — check for free play in the steering, measured at the rim ..., track rod ends worn. Suspension — check for wheel bearings worn, subframe bushes or mounts worn, abs fault.
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 280?
Enter the reg to see its full MOT history, mileage records, write-off status, and finance checks.
Mercedes Benz 280 MOT FAQs
What are the most common MOT failures on a Mercedes Benz 280?
Based on 9,722 DVSA MOT tests, the most common failure is fluid leak — at 24x the national fleet average. Other frequent failures include free play in the steering, measured at the rim ... and wheel bearings worn.
Is the Mercedes Benz 280 reliable based on MOT data?
The Mercedes Benz 280 has 16 categories where it fails more often than average. The main concern is fluid leak. 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 280 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 exhaust system damage.
How do I check a Mercedes Benz 280'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.