Mercedes 612d MOT Pass Rate
Overall pass rate across all manufacture years, based on 89 real MOT test results. Failure rate: 40.4%.
Data from official DVSA MOT testing records
Mercedes 612d MOT Reliability Overview
The Mercedes 612d is a rare vehicle in the UK, with 89 MOT test results recorded in our database spanning 1 manufacture years. It has an overall MOT pass rate of 59.6% and a failure rate of 40.4%, which is slightly below the UK average of approximately 37%.
Based on this data, the Mercedes 612d earns a "Below Average" reliability rating. The average Mercedes 612d presents for MOT with approximately 145,716 miles on the clock. The 1997 manufacture year performs best with a 56.4% pass rate.
The most common MOT failure for the Mercedes 612d is Brakes, affecting 37.1% 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 28.1%. Steering rounds out the top three at 18.0%. 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 | 45.0% | 40 |
| 2 | Brakes | 42.7% | 38 |
| 3 | Body, Structure And General Items | 18.0% | 16 |
| 4 | Steering | 18.0% | 16 |
| 5 | Exhaust, Fuel And Emissions | 15.7% | 14 |
| 6 | Suspension | 14.6% | 13 |
| 7 | Tyres | 9.0% | 8 |
| 8 | Body, Chassis, Structure | 7.9% | 7 |
| 9 | Driver's View Of The Road | 7.9% | 7 |
| 10 | Visibility | 4.5% | 4 |
| 11 | Seat Belts And Supplementary Restraint Systems | 4.5% | 4 |
| 12 | Registration Plates And Vin | 2.2% | 2 |
| 13 | Non-component Advisories | 1.1% | 1 |
| 14 | Noise, Emissions And Leaks | 1.1% | 1 |
Failures per 10,000 Miles
avg. 145,716 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 | 3.09 | 45.0% | 40 |
| Brakes | 2.93 | 42.7% | 38 |
| Body & Structure | 1.77 | 25.9% | 23 |
| Steering | 1.23 | 18.0% | 16 |
| Emissions & Exhaust | 1.08 | 15.7% | 14 |
| Suspension | 1.00 | 14.6% | 13 |
| Visibility | 0.85 | 12.4% | 11 |
| Tyres | 0.62 | 9.0% | 8 |
| Seat Belts | 0.31 | 4.5% | 4 |
| Registration Plates and VIN | 0.15 | 2.2% | 2 |
| Non-component advisories | 0.08 | 1.1% | 1 |
| Noise, emissions and leaks | 0.08 | 1.1% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Mercedes 612d has 145,716 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 612d has a mileage-adjusted failure rate of 2.77% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Mercedes 612d MOT Data
The Mercedes 612d is a rare vehicle in the UK, with 89 MOT test results recorded in our database spanning 1 manufacture years. It has an overall MOT pass rate of 59.6% and a failure rate of 40.4%, which is slightly below the UK average of approximately 37%.
For Mercedes 612d 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 612d is likely to perform.
Brakes — 37.1% of failures
Brakes issues account for 37.1% of MOT failures on the Mercedes 612d. 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 — 28.1% of failures
Lamps, Reflectors and Electrical Equipment issues account for 28.1% of MOT failures on the Mercedes 612d. 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.
Steering — 18.0% of failures
Steering issues account for 18.0% of MOT failures on the Mercedes 612d. Steering failures include excessive play in the steering wheel, leaking power steering fluid, worn track rod ends, and damaged steering rack. These affect vehicle control and are closely related to suspension wear. Typical repair costs: £150–600. Pre-MOT check: Check for excessive steering wheel play (more than a few inches of free movement). Listen for whining from the power steering pump. Look for fluid leaks under the car near the front wheels.
Frequently Asked Questions
What is the MOT pass rate for the Mercedes 612d?
Based on 89 (based on limited data) MOT tests in our database, the Mercedes 612d has an overall pass rate of 59.6% (40.4% fail rate).
What are the most common MOT failures on a Mercedes 612d?
The top 3 reasons a Mercedes 612d fails its MOT are: 1. Brakes (37.1%), 2. Lamps, Reflectors and Electrical Equipment (28.1%), 3. Steering (18.0%). Check these areas before booking your MOT.
Is the Mercedes 612d reliable?
With a 40.4% MOT failure rate, the 612d is about average compared to the UK average of ~40%.
What should I check before an MOT on my Mercedes 612d?
Based on failure data, focus on: Brakes (37.1%); Lamps, Reflectors and Electrical Equipment (28.1%); Steering (18.0%). 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.