2009 Mercedes-Benz 350 MOT Pass Rate
Pass rate for 350 models manufactured in 2009, based on 92 real MOT test results.
Data from official DVSA MOT testing records
2009 Mercedes-Benz 350 MOT Analysis
The 2009 Mercedes-Benz 350 has an MOT pass rate of 78.3% based on 92 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 88,311 miles on the odometer. With a 21.7% failure rate, the 2009 350 is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 2009 Mercedes-Benz 350 is Brakes, responsible for 12.0% of failures. 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 range from £150–400. Lamps, reflectors and electrical equipment is the second most common issue at 6.5%. Suspension follows at 5.4%.
Top failures specific to 2009 models only. The overall 350 page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Brakes | 12.0% | 11 |
| 2 | Lamps, Reflectors And Electrical Equipment | 6.5% | 6 |
| 3 | Suspension | 5.4% | 5 |
| 4 | Identification Of The Vehicle | 1.1% | 1 |
| 5 | Noise, Emissions And Leaks | 1.1% | 1 |
| 6 | Non-component Advisories | 1.1% | 1 |
| 7 | Visibility | 1.1% | 1 |
Failures per 10,000 Miles
avg. 88,311 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.
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| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Brakes | 1.35 | 12.0% | 11 |
| Lamps & Electrical | 0.74 | 6.5% | 6 |
| Suspension | 0.62 | 5.4% | 5 |
| Identification of the vehicle | 0.12 | 1.1% | 1 |
| Noise, emissions and leaks | 0.12 | 1.1% | 1 |
| Non-component advisories | 0.12 | 1.1% | 1 |
| Visibility | 0.12 | 1.1% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2009 Mercedes-Benz 350 has an MOT pass rate of 78.3% based on 92 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 88,311 miles on the odometer. With a 21.7% failure rate, the 2009 350 is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 2009 Mercedes-Benz 350, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to brakes: 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). With an average mileage of 88,311 miles, these vehicles are in the higher-mileage bracket where wear-related failures become more common.
Brakes — 12.0% of failures
Brakes issues account for 12.0% of MOT failures on 2009 Mercedes-Benz 350 models. 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 — 6.5% of failures
Lamps, reflectors and electrical equipment issues account for 6.5% of MOT failures on 2009 Mercedes-Benz 350 models. 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.
Suspension — 5.4% of failures
Suspension issues account for 5.4% of MOT failures on 2009 Mercedes-Benz 350 models. Suspension failures typically involve worn bushes, leaking shock absorbers, broken coil springs, and damaged suspension arms. These affect ride quality, tyre wear, and road holding. Typical repair costs: £200–500. Pre-MOT check: Look for uneven tyre wear, listen for clunking over bumps, and check if the car pulls to one side. A bouncy ride suggests worn shock absorbers. Visually inspect coil springs for cracks.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.