Mercedes-Benz Sls MOT Pass Rate
Overall pass rate across all manufacture years, based on 2,317 real MOT test results. Failure rate: 6.5%.
Data from official DVSA MOT testing records
Mercedes-Benz Sls MOT Reliability Overview
The Mercedes-Benz Sls is a niche vehicle in the UK, with 2,317 MOT test results recorded in our database spanning 5 manufacture years. It has an overall MOT pass rate of 93.5% and a failure rate of 6.5%, which is well above the UK average of approximately 37%.
Based on this data, the Mercedes-Benz Sls earns a "Excellent" reliability rating. The average Mercedes-Benz Sls presents for MOT with approximately 16,519 miles on the clock. Manufacture year matters: 2012 models achieve the highest pass rate at 95.0%, while 2013 models have the lowest at 92.0%. This 3.0 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Mercedes-Benz Sls is Tyres, affecting 6.3% of all tests. 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. The second most common issue is Lamps, reflectors and electrical equipment at 2.5%. Brakes rounds out the top three at 1.8%. 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
📉 How Age Affects Reliability
MOT failure rate by vehicle age for the Mercedes-Benz Sls. The dashed red line marks when the manufacturer warranty typically expires (3 years).
Line chart showing MOT failure rate by vehicle age from 6 to 14 years, with warranty expiry marked at 3 years.
💡 What does the warranty cliff mean?
The Mercedes-Benz Sls shows a relatively stable failure rate after warranty — the change of 0% is negligible. Peak failure occurs at age 7 (9.5% fail rate).
Note: pass rates may improve for very old vehicles due to survivorship bias — only well-maintained cars remain on the road.
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 | Tyres | 6.3% | 146 |
| 2 | Lamps, Reflectors And Electrical Equipment | 3.0% | 70 |
| 3 | Brakes | 1.8% | 41 |
| 4 | Identification Of The Vehicle | 0.9% | 20 |
| 5 | Noise, Emissions And Leaks | 0.6% | 15 |
| 6 | Visibility | 0.6% | 15 |
| 7 | Suspension | 0.5% | 11 |
| 8 | Registration Plates And Vin | 0.3% | 8 |
| 9 | Road Wheels | 0.3% | 6 |
| 10 | Non-component Advisories | 0.1% | 3 |
| 11 | Exhaust, Fuel And Emissions | 0.1% | 2 |
| 12 | Body, Chassis, Structure | 0.1% | 2 |
Failures per 10,000 Miles
avg. 16,519 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 |
|---|---|---|---|
| Tyres | 3.81 | 6.3% | 146 |
| Lamps & Electrical | 1.83 | 3.0% | 70 |
| Brakes | 1.07 | 1.8% | 41 |
| Identification of the vehicle | 0.52 | 0.9% | 20 |
| Visibility | 0.42 | 0.6% | 16 |
| Noise, emissions and leaks | 0.39 | 0.6% | 15 |
| Suspension | 0.29 | 0.5% | 11 |
| Registration Plates and VIN | 0.21 | 0.3% | 8 |
| Wheels | 0.16 | 0.3% | 6 |
| Non-component advisories | 0.08 | 0.1% | 3 |
| Emissions & Exhaust | 0.05 | 0.1% | 2 |
| Body & Structure | 0.05 | 0.1% | 2 |
| Seat Belts | 0.03 | 0.0% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Mercedes-Benz Sls has 16,519 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-Benz Sls has a mileage-adjusted failure rate of 3.93% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Mercedes-Benz Sls MOT Data
The Mercedes-Benz Sls is a niche vehicle in the UK, with 2,317 MOT test results recorded in our database spanning 5 manufacture years. It has an overall MOT pass rate of 93.5% and a failure rate of 6.5%, which is well above the UK average of approximately 37%.
For Mercedes-Benz Sls owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on tyres 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 Sls is likely to perform.
Tyres — 6.3% of failures
Tyres issues account for 6.3% of MOT failures on the Mercedes-Benz Sls. 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.
Lamps, reflectors and electrical equipment — 2.5% of failures
Lamps, reflectors and electrical equipment issues account for 2.5% of MOT failures on the Mercedes-Benz Sls. 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.
Brakes — 1.8% of failures
Brakes issues account for 1.8% of MOT failures on the Mercedes-Benz Sls. 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-Benz Sls?
Based on 2,317 MOT tests in our database, the Mercedes-Benz Sls has an overall pass rate of 93.5% (6.5% fail rate).
What are the most common MOT failures on a Mercedes-Benz Sls?
The top 3 reasons a Mercedes-Benz Sls fails its MOT are: 1. Tyres (6.3%), 2. Lamps, reflectors and electrical equipment (2.5%), 3. Brakes (1.8%). Check these areas before booking your MOT.
Is the Mercedes-Benz Sls reliable?
With a 6.5% MOT failure rate, the Sls is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Mercedes-Benz Sls?
Based on failure data, focus on: Tyres (6.3%); Lamps, reflectors and electrical equipment (2.5%); Brakes (1.8%). 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.