Mercedes Cls 350 Auto MOT Pass Rate
Overall pass rate across all manufacture years, based on 62 real MOT test results. Failure rate: 24.2%.
Data from official DVSA MOT testing records
Mercedes Cls 350 Auto MOT Reliability Overview
The Mercedes Cls 350 Auto is a rare vehicle in the UK, with 62 MOT test results recorded in our database spanning 1 manufacture years. It has an overall MOT pass rate of 75.8% and a failure rate of 24.2%, which is well above the UK average of approximately 37%.
Based on this data, the Mercedes Cls 350 Auto earns a "Excellent" reliability rating. The average Mercedes Cls 350 Auto presents for MOT with approximately 56,949 miles on the clock. The 2005 manufacture year performs best with a 72.9% pass rate.
The most common MOT failure for the Mercedes Cls 350 Auto is Tyres, affecting 19.4% 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 8.1%. Suspension 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 | Tyres | 29.0% | 18 |
| 2 | Brakes | 9.7% | 6 |
| 3 | Suspension | 8.1% | 5 |
| 4 | Driver's View Of The Road | 6.5% | 4 |
| 5 | Exhaust, Fuel And Emissions | 4.8% | 3 |
| 6 | Lamps, Reflectors And Electrical Equipment | 4.8% | 3 |
Failures per 10,000 Miles
avg. 56,949 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 | 5.10 | 29.0% | 18 |
| Brakes | 1.70 | 9.7% | 6 |
| Suspension | 1.42 | 8.1% | 5 |
| Visibility | 1.13 | 6.5% | 4 |
| Emissions & Exhaust | 0.85 | 4.8% | 3 |
| Lamps & Electrical | 0.85 | 4.8% | 3 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Mercedes Cls 350 Auto has 56,949 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 Cls 350 Auto has a mileage-adjusted failure rate of 4.25% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Mercedes Cls 350 Auto MOT Data
The Mercedes Cls 350 Auto is a rare vehicle in the UK, with 62 MOT test results recorded in our database spanning 1 manufacture years. It has an overall MOT pass rate of 75.8% and a failure rate of 24.2%, which is well above the UK average of approximately 37%.
For Mercedes Cls 350 Auto 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 Cls 350 Auto is likely to perform.
Tyres — 19.4% of failures
Tyres issues account for 19.4% of MOT failures on the Mercedes Cls 350 Auto. 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 — 8.1% of failures
Brakes issues account for 8.1% of MOT failures on the Mercedes Cls 350 Auto. 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).
Suspension — 8.1% of failures
Suspension issues account for 8.1% of MOT failures on the Mercedes Cls 350 Auto. 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.
Frequently Asked Questions
What is the MOT pass rate for the Mercedes Cls 350 Auto?
Based on 62 (based on limited data) MOT tests in our database, the Mercedes Cls 350 Auto has an overall pass rate of 75.8% (24.2% fail rate).
What are the most common MOT failures on a Mercedes Cls 350 Auto?
The top 3 reasons a Mercedes Cls 350 Auto fails its MOT are: 1. Tyres (19.4%), 2. Brakes (8.1%), 3. Suspension (8.1%). Check these areas before booking your MOT.
Is the Mercedes Cls 350 Auto reliable?
With a 24.2% MOT failure rate, the Cls 350 Auto is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Mercedes Cls 350 Auto?
Based on failure data, focus on: Tyres (19.4%); Brakes (8.1%); Suspension (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.