Mercedes Sls Amg MOT Pass Rate
Overall pass rate across all manufacture years, based on 78 real MOT test results. Failure rate: 12.8%.
Data from official DVSA MOT testing records
Mercedes Sls Amg MOT Reliability Overview
The Mercedes Sls Amg is a rare vehicle in the UK, with 78 MOT test results recorded in our database spanning 2 manufacture years. It has an overall MOT pass rate of 87.2% and a failure rate of 12.8%, which is well above the UK average of approximately 37%.
Based on this data, the Mercedes Sls Amg earns a "Excellent" reliability rating. The average Mercedes Sls Amg presents for MOT with approximately 13,085 miles on the clock. Manufacture year matters: 2010 models achieve the highest pass rate at 88.2%, while 2011 models have the lowest at 83.3%. This 4.9 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Mercedes Sls Amg is Tyres, affecting 10.3% 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 Brakes at 2.6%. Exhaust, Fuel and Emissions rounds out the top three at 1.3%. 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 | Tyres | 10.3% | 8 |
| 2 | Brakes | 2.6% | 2 |
| 3 | Lamps, Reflectors And Electrical Equipment | 2.6% | 2 |
| 4 | Suspension | 1.3% | 1 |
| 5 | Registration Plates And Vin | 1.3% | 1 |
| 6 | Exhaust, Fuel And Emissions | 1.3% | 1 |
Failures per 10,000 Miles
avg. 13,085 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 | 7.84 | 10.3% | 8 |
| Brakes | 1.96 | 2.6% | 2 |
| Lamps & Electrical | 1.96 | 2.6% | 2 |
| Suspension | 0.98 | 1.3% | 1 |
| Registration Plates and VIN | 0.98 | 1.3% | 1 |
| Emissions & Exhaust | 0.98 | 1.3% | 1 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Mercedes Sls Amg has 13,085 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 Sls Amg has a mileage-adjusted failure rate of 9.78% per 10,000 miles driven. The average across all makes is 5.38%, so this model is worse than average.
About Mercedes Sls Amg MOT Data
The Mercedes Sls Amg is a rare vehicle in the UK, with 78 MOT test results recorded in our database spanning 2 manufacture years. It has an overall MOT pass rate of 87.2% and a failure rate of 12.8%, which is well above the UK average of approximately 37%.
For Mercedes Sls Amg owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on tyres and brakes 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 Amg is likely to perform.
Tyres — 10.3% of failures
Tyres issues account for 10.3% of MOT failures on the Mercedes Sls Amg. 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 — 2.6% of failures
Brakes issues account for 2.6% of MOT failures on the Mercedes Sls Amg. 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).
Exhaust, Fuel and Emissions — 1.3% of failures
Exhaust, Fuel and Emissions issues account for 1.3% of MOT failures on the Mercedes Sls Amg. Emissions failures occur when exhaust gases exceed legal limits for carbon monoxide (CO), hydrocarbons (HC), or particulate matter (diesel). Common causes include faulty oxygen sensors, clogged catalytic converters, or DPF issues on diesel vehicles. Typical repair costs: £100–1,000+. Pre-MOT check: If the engine management light is on, get it diagnosed before the MOT. For diesel cars, ensure the DPF has completed a regeneration cycle. Regular servicing and using premium fuel before the test can help.
Frequently Asked Questions
What is the MOT pass rate for the Mercedes Sls Amg?
Based on 78 (based on limited data) MOT tests in our database, the Mercedes Sls Amg has an overall pass rate of 87.2% (12.8% fail rate).
What are the most common MOT failures on a Mercedes Sls Amg?
The top 3 reasons a Mercedes Sls Amg fails its MOT are: 1. Tyres (10.3%), 2. Brakes (2.6%), 3. Exhaust, Fuel and Emissions (1.3%). Check these areas before booking your MOT.
Is the Mercedes Sls Amg reliable?
With a 12.8% MOT failure rate, the Sls Amg is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Mercedes Sls Amg?
Based on failure data, focus on: Tyres (10.3%); Brakes (2.6%); Exhaust, Fuel and Emissions (1.3%). 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.