2004 Mercedes-Benz Unclassified MOT Pass Rate
Pass rate for Unclassified models manufactured in 2004, based on 115 real MOT test results.
Data from official DVSA MOT testing records
2004 Mercedes-Benz Unclassified MOT Analysis
The 2004 Mercedes-Benz Unclassified has an MOT pass rate of 70.4% based on 115 tests — above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 78,482 miles on the odometer. With a 29.6% failure rate, the 2004 Unclassified is rated as "Very Good" for MOT reliability.
The leading cause of MOT failure for the 2004 Mercedes-Benz Unclassified is Body, chassis, structure, responsible for 7.0% of failures. Body and structure failures include excessive corrosion, sharp edges, loose panels, and damage to the vehicle frame. Rust is the primary concern, especially on older vehicles or those exposed to road salt. Typical repair costs range from £100–500+. Lamps, reflectors and electrical equipment is the second most common issue at 5.2%. Noise, emissions and leaks follows at 1.7%.
Top failures specific to 2004 models only. The overall Unclassified 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 | Body, Chassis, Structure | 7.0% | 8 |
| 2 | Lamps, Reflectors And Electrical Equipment | 5.2% | 6 |
| 3 | Noise, Emissions And Leaks | 1.7% | 2 |
| 4 | Tyres | 1.7% | 2 |
| 5 | Visibility | 1.7% | 2 |
Failures per 10,000 Miles
avg. 78,482 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 |
|---|---|---|---|
| Body & Structure | 0.89 | 7.0% | 8 |
| Lamps & Electrical | 0.66 | 5.2% | 6 |
| Noise, emissions and leaks | 0.22 | 1.7% | 2 |
| Tyres | 0.22 | 1.7% | 2 |
| Visibility | 0.22 | 1.7% | 2 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2004 Mercedes-Benz Unclassified has an MOT pass rate of 70.4% based on 115 tests — above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 78,482 miles on the odometer. With a 29.6% failure rate, the 2004 Unclassified is rated as "Very Good" for MOT reliability.
If you own or are considering buying a 2004 Mercedes-Benz Unclassified, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to body, chassis, structure: Inspect sills, wheel arches, door bottoms, and the chassis for rust. Surface rust is acceptable but structural corrosion or holes will fail. Check that all doors, bonnet, and boot close securely. At 78,482 average miles, these vehicles are in the mid-range where component wear starts to become a factor.
Body, chassis, structure — 7.0% of failures
Body, chassis, structure issues account for 7.0% of MOT failures on 2004 Mercedes-Benz Unclassified models. Body and structure failures include excessive corrosion, sharp edges, loose panels, and damage to the vehicle frame. Rust is the primary concern, especially on older vehicles or those exposed to road salt. Typical repair costs: £100–500+. Pre-MOT check: Inspect sills, wheel arches, door bottoms, and the chassis for rust. Surface rust is acceptable but structural corrosion or holes will fail. Check that all doors, bonnet, and boot close securely.
Lamps, reflectors and electrical equipment — 5.2% of failures
Lamps, reflectors and electrical equipment issues account for 5.2% of MOT failures on 2004 Mercedes-Benz Unclassified 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.
Noise, emissions and leaks — 1.7% of failures
Noise, emissions and leaks issues account for 1.7% of MOT failures on 2004 Mercedes-Benz Unclassified models. Emissions failures occur when exhaust gases exceed legal limits for carbon monoxide (CO), hydrocarbons (HC), or particulate matter (diesel). Common causes include faulty oxygen sensors, clogged catalytic converters, or DPF issues on diesel vehicles. Typical repair costs: £100–1,000+. Pre-MOT check: If the engine management light is on, get it diagnosed before the MOT. For diesel cars, ensure the DPF has completed a regeneration cycle. Regular servicing and using premium fuel before the test can help.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.