Mercedes Ml300cdi MOT Pass Rate
Overall pass rate across all manufacture years, based on 63 real MOT test results. Failure rate: 33.3%.
Data from official DVSA MOT testing records
Mercedes Ml300cdi MOT Reliability Overview
The Mercedes Ml300cdi is a rare vehicle in the UK, with 63 MOT test results recorded in our database spanning 1 manufacture years. It has an overall MOT pass rate of 66.7% and a failure rate of 33.3%, which is slightly above the UK average of approximately 37%.
Based on this data, the Mercedes Ml300cdi earns a "Good" reliability rating. The average Mercedes Ml300cdi presents for MOT with approximately 68,077 miles on the clock. The 2010 manufacture year performs best with a 66.7% pass rate.
The most common MOT failure for the Mercedes Ml300cdi is Tyres, affecting 36.5% of all tests. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. The second most common issue is Brakes at 28.6%. Lamps, reflectors and electrical equipment rounds out the top three at 11.1%. Together, these top 3 failure categories account for a significant portion of all MOT failures for this model.
Top failures across all manufacture years combined. Individual year pages may show different top failures.
What Fails Most
Pass Rate by Manufacture Year
* High Fail Rate badge indicates an MOT pass rate below 65% (failure rate above 35%).
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Tyres | 36.5% | 23 |
| 2 | Brakes | 28.6% | 18 |
| 3 | Lamps, Reflectors And Electrical Equipment | 20.6% | 13 |
| 4 | Driver's View Of The Road | 4.8% | 3 |
| 5 | Visibility | 4.8% | 3 |
| 6 | Non-component Advisories | 4.8% | 3 |
| 7 | Suspension | 4.8% | 3 |
| 8 | Body, Chassis, Structure | 3.2% | 2 |
| 9 | Noise, Emissions And Leaks | 1.6% | 1 |
| 10 | Seat Belts And Supplementary Restraint Systems | 1.6% | 1 |
Failures per 10,000 Miles
avg. 68,077 miFor every 10,000 miles driven, this shows what percentage of MOT tests fail for each category. This accounts for how far cars are actually driven, not just raw pass/fail counts.
View as table
| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Tyres | 5.36 | 36.5% | 23 |
| Brakes | 4.20 | 28.6% | 18 |
| Lamps & Electrical | 3.03 | 20.6% | 13 |
| Visibility | 1.40 | 9.6% | 6 |
| Non-component advisories | 0.70 | 4.8% | 3 |
| Suspension | 0.70 | 4.8% | 3 |
| Body & Structure | 0.47 | 3.2% | 2 |
| Noise, emissions and leaks | 0.23 | 1.6% | 1 |
| Seat Belts | 0.23 | 1.6% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Mercedes Ml300cdi has 68,077 miles when tested for MOT.
📊 Mileage-Adjusted Failure Rate
How often this car fails MOT relative to how much it's driven — a fairer comparison than raw pass rate.
The Mercedes Ml300cdi has a mileage-adjusted failure rate of 4.89% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Mercedes Ml300cdi MOT Data
The Mercedes Ml300cdi is a rare vehicle in the UK, with 63 MOT test results recorded in our database spanning 1 manufacture years. It has an overall MOT pass rate of 66.7% and a failure rate of 33.3%, which is slightly above the UK average of approximately 37%.
For Mercedes Ml300cdi owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on tyres and brakes for the best chance of a first-time pass. Use our detailed year-by-year breakdown and failure analysis below to understand how your specific Ml300cdi is likely to perform.
Tyres — 36.5% of failures
Tyres issues account for 36.5% of MOT failures on the Mercedes Ml300cdi. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs: £50–200 per tyre. Pre-MOT check: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating.
Brakes — 28.6% of failures
Brakes issues account for 28.6% of MOT failures on the Mercedes Ml300cdi. Brake-related failures include worn brake pads, corroded brake discs, leaking brake lines, and faulty brake servos. These are safety-critical components — any brake deficiency will result in an MOT fail. Typical repair costs: £150–400. Pre-MOT check: Listen for squealing or grinding noises. Check brake pedal feel — if it feels spongy or goes to the floor, have the system inspected immediately. Look at brake pad thickness through the wheel spokes (minimum 3mm).
Lamps, reflectors and electrical equipment — 11.1% of failures
Lamps, reflectors and electrical equipment issues account for 11.1% of MOT failures on the Mercedes Ml300cdi. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs: £5–50. Pre-MOT check: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test.
Frequently Asked Questions
What is the MOT pass rate for the Mercedes Ml300cdi?
Based on 63 (based on limited data) MOT tests in our database, the Mercedes Ml300cdi has an overall pass rate of 66.7% (33.3% fail rate).
What are the most common MOT failures on a Mercedes Ml300cdi?
The top 3 reasons a Mercedes Ml300cdi fails its MOT are: 1. Tyres (36.5%), 2. Brakes (28.6%), 3. Lamps, reflectors and electrical equipment (11.1%). Check these areas before booking your MOT.
Is the Mercedes Ml300cdi reliable?
With a 33.3% MOT failure rate, the Ml300cdi is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Mercedes Ml300cdi?
Based on failure data, focus on: Tyres (36.5%); Brakes (28.6%); Lamps, reflectors and electrical equipment (11.1%). These are the areas most likely to cause a fail. Also check all lights, tyres (minimum 1.6mm tread), and windscreen condition — these are quick wins that apply to all cars.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.