Mercedes Mb100d MOT Pass Rate
Overall pass rate across all manufacture years, based on 207 real MOT test results. Failure rate: 43.5%.
Data from official DVSA MOT testing records
Mercedes Mb100d MOT Reliability Overview
The Mercedes Mb100d is a rare vehicle in the UK, with 207 MOT test results recorded in our database spanning 4 manufacture years. It has an overall MOT pass rate of 56.5% and a failure rate of 43.5%, which is slightly below the UK average of approximately 37%.
Based on this data, the Mercedes Mb100d earns a "Below Average" reliability rating. The average Mercedes Mb100d presents for MOT with approximately 156,241 miles on the clock. Manufacture year matters: 1992 models achieve the highest pass rate at 61.3%, while 1994 models have the lowest at 41.9%. This 19.4 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Mercedes Mb100d is Brakes, affecting 38.2% of all tests. 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. The second most common issue is Lamps, Reflectors and Electrical Equipment at 30.4%. Suspension rounds out the top three at 30.0%. 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 | Lamps, Reflectors And Electrical Equipment | 63.8% | 132 |
| 2 | Brakes | 44.4% | 92 |
| 3 | Suspension | 34.3% | 71 |
| 4 | Steering | 19.3% | 40 |
| 5 | Driver's View Of The Road | 15.0% | 31 |
| 6 | Exhaust, Fuel And Emissions | 11.1% | 23 |
| 7 | Body, Structure And General Items | 10.6% | 22 |
| 8 | Body, Chassis, Structure | 9.2% | 19 |
| 9 | Visibility | 5.8% | 12 |
| 10 | Tyres | 5.8% | 12 |
| 11 | Noise, Emissions And Leaks | 4.3% | 9 |
| 12 | Registration Plates And Vin | 2.4% | 5 |
| 13 | Seat Belts And Supplementary Restraint Systems | 1.4% | 3 |
| 14 | Identification Of The Vehicle | 1.0% | 2 |
Failures per 10,000 Miles
avg. 156,241 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 |
|---|---|---|---|
| Lamps & Electrical | 4.08 | 63.8% | 132 |
| Brakes | 2.84 | 44.4% | 92 |
| Suspension | 2.20 | 34.3% | 71 |
| Visibility | 1.33 | 20.8% | 43 |
| Body & Structure | 1.27 | 19.8% | 41 |
| Steering | 1.24 | 19.3% | 40 |
| Emissions & Exhaust | 0.71 | 11.1% | 23 |
| Tyres | 0.37 | 5.8% | 12 |
| Noise, emissions and leaks | 0.28 | 4.3% | 9 |
| Registration Plates and VIN | 0.15 | 2.4% | 5 |
| Seat Belts | 0.09 | 1.4% | 3 |
| Identification of the vehicle | 0.06 | 1.0% | 2 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Mercedes Mb100d has 156,241 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 Mb100d has a mileage-adjusted failure rate of 2.78% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Mercedes Mb100d MOT Data
The Mercedes Mb100d is a rare vehicle in the UK, with 207 MOT test results recorded in our database spanning 4 manufacture years. It has an overall MOT pass rate of 56.5% and a failure rate of 43.5%, which is slightly below the UK average of approximately 37%.
For Mercedes Mb100d owners, these results suggest average reliability — some preparation before MOT can improve pass chances. Focus your pre-MOT checks on brakes and lamps, reflectors and electrical equipment 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 Mb100d is likely to perform.
Brakes — 38.2% of failures
Brakes issues account for 38.2% of MOT failures on the Mercedes Mb100d. 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 — 30.4% of failures
Lamps, Reflectors and Electrical Equipment issues account for 30.4% of MOT failures on the Mercedes Mb100d. 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 — 30.0% of failures
Suspension issues account for 30.0% of MOT failures on the Mercedes Mb100d. 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.
Frequently Asked Questions
What is the MOT pass rate for the Mercedes Mb100d?
Based on 207 MOT tests in our database, the Mercedes Mb100d has an overall pass rate of 56.5% (43.5% fail rate).
What are the most common MOT failures on a Mercedes Mb100d?
The top 3 reasons a Mercedes Mb100d fails its MOT are: 1. Brakes (38.2%), 2. Lamps, Reflectors and Electrical Equipment (30.4%), 3. Suspension (30.0%). Check these areas before booking your MOT.
Is the Mercedes Mb100d reliable?
With a 43.5% MOT failure rate, the Mb100d is about average compared to the UK average of ~40%.
What should I check before an MOT on my Mercedes Mb100d?
Based on failure data, focus on: Brakes (38.2%); Lamps, Reflectors and Electrical Equipment (30.4%); Suspension (30.0%). 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.