Mercedes 500sl MOT Pass Rate
Overall pass rate across all manufacture years, based on 285 real MOT test results. Failure rate: 17.2%.
Data from official DVSA MOT testing records
Mercedes 500sl MOT Reliability Overview
The Mercedes 500sl is a rare vehicle in the UK, with 285 MOT test results recorded in our database spanning 2 manufacture years. It has an overall MOT pass rate of 82.8% and a failure rate of 17.2%, which is well above the UK average of approximately 37%.
Based on this data, the Mercedes 500sl earns a "Excellent" reliability rating. The average Mercedes 500sl presents for MOT with approximately 77,330 miles on the clock. Manufacture year matters: 2002 models achieve the highest pass rate at 95.7%, while 2003 models have the lowest at 80.5%. This 15.2 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Mercedes 500sl is Suspension, affecting 16.1% 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 Tyres at 8.8%. Brakes rounds out the top three at 8.4%. 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
Best Year to Buy
📈 How Each Vintage Ages
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 | 17.5% | 50 |
| 2 | Tyres | 11.9% | 34 |
| 3 | Brakes | 11.2% | 32 |
| 4 | Lamps, Reflectors And Electrical Equipment | 7.7% | 22 |
| 5 | Registration Plates And Vin | 4.2% | 12 |
| 6 | Exhaust, Fuel And Emissions | 3.5% | 10 |
| 7 | Visibility | 1.8% | 5 |
| 8 | Road Wheels | 1.4% | 4 |
| 9 | Seat Belts And Supplementary Restraint Systems | 1.4% | 4 |
| 10 | Identification Of The Vehicle | 0.7% | 2 |
| 11 | Driver's View Of The Road | 0.7% | 2 |
| 12 | Body, Structure And General Items | 0.7% | 2 |
| 13 | Steering | 0.4% | 1 |
| 14 | Noise, Emissions And Leaks | 0.4% | 1 |
Failures per 10,000 Miles
avg. 77,330 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 | 2.27 | 17.5% | 50 |
| Tyres | 1.54 | 11.9% | 34 |
| Brakes | 1.45 | 11.2% | 32 |
| Lamps & Electrical | 1.00 | 7.7% | 22 |
| Registration Plates and VIN | 0.54 | 4.2% | 12 |
| Emissions & Exhaust | 0.45 | 3.5% | 10 |
| Visibility | 0.32 | 2.5% | 7 |
| Wheels | 0.18 | 1.4% | 4 |
| Seat Belts | 0.18 | 1.4% | 4 |
| Identification of the vehicle | 0.09 | 0.7% | 2 |
| Body & Structure | 0.09 | 0.7% | 2 |
| Steering | 0.05 | 0.4% | 1 |
| Noise, emissions and leaks | 0.05 | 0.4% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Mercedes 500sl has 77,330 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 500sl has a mileage-adjusted failure rate of 2.22% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Mercedes 500sl MOT Data
The Mercedes 500sl is a rare vehicle in the UK, with 285 MOT test results recorded in our database spanning 2 manufacture years. It has an overall MOT pass rate of 82.8% and a failure rate of 17.2%, which is well above the UK average of approximately 37%.
For Mercedes 500sl owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on suspension and tyres 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 500sl is likely to perform.
Suspension — 16.1% of failures
Suspension issues account for 16.1% of MOT failures on the Mercedes 500sl. 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.
Tyres — 8.8% of failures
Tyres issues account for 8.8% of MOT failures on the Mercedes 500sl. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs: £50–200 per tyre. Pre-MOT check: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating.
Brakes — 8.4% of failures
Brakes issues account for 8.4% of MOT failures on the Mercedes 500sl. 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).
Frequently Asked Questions
What is the MOT pass rate for the Mercedes 500sl?
Based on 285 MOT tests in our database, the Mercedes 500sl has an overall pass rate of 82.8% (17.2% fail rate).
What are the most common MOT failures on a Mercedes 500sl?
The top 3 reasons a Mercedes 500sl fails its MOT are: 1. Suspension (16.1%), 2. Tyres (8.8%), 3. Brakes (8.4%). Check these areas before booking your MOT.
Is the Mercedes 500sl reliable?
With a 17.2% MOT failure rate, the 500sl is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Mercedes 500sl?
Based on failure data, focus on: Suspension (16.1%); Tyres (8.8%); Brakes (8.4%). 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.