Mercedes 250sl MOT Pass Rate
Overall pass rate across all manufacture years, based on 160 real MOT test results. Failure rate: 15.0%.
Data from official DVSA MOT testing records
Mercedes 250sl MOT Reliability Overview
The Mercedes 250sl is a rare vehicle in the UK, with 160 MOT test results recorded in our database spanning 2 manufacture years. It has an overall MOT pass rate of 85.0% and a failure rate of 15.0%, which is well above the UK average of approximately 37%.
Based on this data, the Mercedes 250sl earns a "Excellent" reliability rating. The average Mercedes 250sl presents for MOT with approximately 43,426 miles on the clock. Manufacture year matters: 1967 models achieve the highest pass rate at 85.8%, while 1968 models have the lowest at 82.1%. This 3.7 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Mercedes 250sl is Suspension, affecting 13.8% of all tests. 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. The second most common issue is Lamps, Reflectors and Electrical Equipment at 10.0%. Driver's View of the Road rounds out the top three at 8.1%. 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 | Suspension | 15.0% | 24 |
| 2 | Lamps, Reflectors And Electrical Equipment | 11.3% | 18 |
| 3 | Driver's View Of The Road | 8.8% | 14 |
| 4 | Brakes | 8.1% | 13 |
| 5 | Steering | 6.9% | 11 |
| 6 | Exhaust, Fuel And Emissions | 4.4% | 7 |
| 7 | Tyres | 2.5% | 4 |
| 8 | Seat Belts And Supplementary Restraint Systems | 1.9% | 3 |
| 9 | Body, Structure And General Items | 1.3% | 2 |
| 10 | Visibility | 0.6% | 1 |
| 11 | Registration Plates And Vin | 0.6% | 1 |
Failures per 10,000 Miles
avg. 43,426 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 |
|---|---|---|---|
| Suspension | 3.45 | 15.0% | 24 |
| Lamps & Electrical | 2.59 | 11.3% | 18 |
| Visibility | 2.15 | 9.4% | 15 |
| Brakes | 1.87 | 8.1% | 13 |
| Steering | 1.58 | 6.9% | 11 |
| Emissions & Exhaust | 1.01 | 4.4% | 7 |
| Tyres | 0.58 | 2.5% | 4 |
| Seat Belts | 0.43 | 1.9% | 3 |
| Body & Structure | 0.29 | 1.3% | 2 |
| Registration Plates and VIN | 0.14 | 0.6% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Mercedes 250sl has 43,426 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 250sl has a mileage-adjusted failure rate of 3.45% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Mercedes 250sl MOT Data
The Mercedes 250sl is a rare vehicle in the UK, with 160 MOT test results recorded in our database spanning 2 manufacture years. It has an overall MOT pass rate of 85.0% and a failure rate of 15.0%, which is well above the UK average of approximately 37%.
For Mercedes 250sl owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on suspension 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 250sl is likely to perform.
Suspension — 13.8% of failures
Suspension issues account for 13.8% of MOT failures on the Mercedes 250sl. 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.
Lamps, Reflectors and Electrical Equipment — 10.0% of failures
Lamps, Reflectors and Electrical Equipment issues account for 10.0% of MOT failures on the Mercedes 250sl. 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.
Driver's View of the Road — 8.1% of failures
Driver's View of the Road issues account for 8.1% of MOT failures on the Mercedes 250sl. Driver's View of the Road issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. Typical repair costs: £100–400. Pre-MOT check: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights.
Frequently Asked Questions
What is the MOT pass rate for the Mercedes 250sl?
Based on 160 MOT tests in our database, the Mercedes 250sl has an overall pass rate of 85.0% (15.0% fail rate).
What are the most common MOT failures on a Mercedes 250sl?
The top 3 reasons a Mercedes 250sl fails its MOT are: 1. Suspension (13.8%), 2. Lamps, Reflectors and Electrical Equipment (10.0%), 3. Driver's View of the Road (8.1%). Check these areas before booking your MOT.
Is the Mercedes 250sl reliable?
With a 15.0% MOT failure rate, the 250sl is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Mercedes 250sl?
Based on failure data, focus on: Suspension (13.8%); Lamps, Reflectors and Electrical Equipment (10.0%); Driver's View of the Road (8.1%). 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.