Mercedes Benz Clc MOT Failures
An analysis of 181,597 real DVSA MOT tests on the Mercedes Benz Clc — what fails, how often, and how that compares to every other car on UK roads. Generations covered: C203 (2008–2011).
Where the Mercedes Benz Clc fails its MOT
The single biggest MOT failure point on the Mercedes Benz Clc is wheel bearings worn — this model is 18 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 181,597 MOT tests, 4.86% of all Mercedes Benz Clc tests recorded this as a failure.
Suspension failures typically mean worn bushes, drop links, or dampers. These affect handling and tyre wear. Budget £150–£400 per corner at an independent garage for full suspension overhaul.
Other notable weak points include stop lamp with a multiple light source up to 1/... (51x the fleet average), light unit fault (52x the fleet average), any fracture or welding defect on a wheel (15x the fleet average), and anti-roll bar links worn (13x the fleet average). These ratios compare the Mercedes Benz Clc'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 5 categories: Suspension, Lights & Electrics, Wheels, Bodywork, Exhaust & Emissions. If you're inspecting a Mercedes Benz Clc 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 Clc'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 Clc specifically, the DVSA data shows the most common failures at this mileage are light unit fault (52x the average) and stop lamp with a multiple light source up to 1/... (51x). suspension pin, bush or joint worn (23x) and wheel bearings worn (17x) 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 Clc specifically, the DVSA data shows the most common failures at this mileage are stop lamp with a multiple light source up to 1/... (25x the average) and emissions failure (20x). headlight fault (17x) and stop lamp position or intensity not in accordan... (16x) 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 Clc specifically, the DVSA data shows the most common failures at this mileage are light unit fault (16x the average) and any fracture or welding defect on a wheel (15x). stop lamp with a multiple light source up to 1/... (12x) and brake hoses perished or damaged (10x) also appear frequently.
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Known issues beyond the MOT
An MOT only tests roadworthiness at a single point in time — it won't catch developing faults, intermittent problems, or issues that haven't yet reached the failure threshold. These are the issues that Mercedes Benz Clc specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.
Brake pipe corrosion (C203) Dangerous
The CLC shows exceptionally high brake pipe failure rates at MOT testing, failing at 10.9 times the national average. Affects C203; typical independent garage repair cost is £150–£400.
Wheel bearing excessive play (C203) Major
The CLC suffers from premature wheel bearing failure at significantly higher rates than the Mercedes fleet average. Affects C203; typical independent garage repair cost is £180–£280.
Suspension component damage and corrosion (C203) Major
The CLC demonstrates severe suspension component deterioration, failing MOT tests at 13.0 times the national average for damaged or corroded suspension parts. Affects C203; typical independent garage repair cost is £300–£800.
Suspension bush deterioration (C203)
The CLC suffers from accelerated suspension bush failure, with MOT data showing joint dust cover deterioration at 12.2 times the fleet average and excessive bush wear at 7.1 times the average. Affects C203; typical independent garage repair cost is £120–£350.
For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full Mercedes Benz Clc common problems breakdown.
What to check before buying a Mercedes Benz Clc
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Mercedes Benz Clc:
Suspension — check for wheel bearings worn, anti-roll bar links worn, suspension pin, bush or joint worn. Lights & Electrics — check for stop lamp with a multiple light source up to 1/..., light unit fault. Wheels — check for any fracture or welding defect on a wheel.
Beyond the MOT items, ask specifically about brake pipe corrosion and wheel bearing excessive play. These won't show up on a standard MOT but can be expensive to fix — repairs start from £150. A specialist pre-purchase inspection is worth the investment on this model.
Always check the car's full MOT history for patterns — recurring advisories often become failures within 12 months. And verify the service history to confirm maintenance has been kept up to schedule. Enter any reg into our free car check to see the complete picture.
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Mercedes Benz Clc MOT FAQs
What are the most common MOT failures on a Mercedes Benz Clc?
Based on 181,597 DVSA MOT tests, the most common failure is wheel bearings worn — at 18x the national fleet average. Other frequent failures include stop lamp with a multiple light source up to 1/... and light unit fault.
Is the Mercedes Benz Clc reliable based on MOT data?
The Mercedes Benz Clc has 18 MOT failure categories above the fleet average. Specialists also flag brake pipe corrosion as a concern. A pre-purchase inspection and service history check are recommended.
What MOT failures should I expect at high mileage?
Above 100,000 miles, the Mercedes Benz Clc most commonly fails on light unit fault and any fracture or welding defect on a wheel. Under 60,000 miles, the main issues are light unit fault and stop lamp with a multiple light source up to 1/....
How do I check a Mercedes Benz Clc'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.