2021 Mercedes-Benz Cls400 Amg Ln Nt Ed Prm+ D 4ma MOT Pass Rate
Pass rate for Cls400 Amg Ln Nt Ed Prm+ D 4ma models manufactured in 2021, based on 350 real MOT test results.
Data from official DVSA MOT testing records
This page shows all Cls400 Amg Ln Nt Ed Prm+ D 4ma cars tested in 2021. Want to see how cars built in 2021 hold up over time?
View 2021 Mercedes-Benz Cls400 Amg Ln Nt Ed Prm+ D 4ma vintage page → (83.0% current pass rate)2021 Mercedes-Benz Cls400 Amg Ln Nt Ed Prm+ D 4ma MOT Analysis
The 2021 Mercedes-Benz Cls400 Amg Ln Nt Ed Prm+ D 4ma has an MOT pass rate of 82.9% based on 350 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 26,256 miles on the odometer. With a 17.1% failure rate, the 2021 Cls400 Amg Ln Nt Ed Prm+ D 4ma is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 2021 Mercedes-Benz Cls400 Amg Ln Nt Ed Prm+ D 4ma is Tyres, responsible for 16.0% of failures. 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 range from £50–200 per tyre. Road Wheels is the second most common issue at 8.6%. Brakes follows at 4.0%.
Top failures specific to 2021 models only. The overall Cls400 Amg Ln Nt Ed Prm+ D 4ma page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Tyres | 16.0% | 56 |
| 2 | Road Wheels | 8.6% | 30 |
| 3 | Brakes | 4.0% | 14 |
| 4 | Visibility | 2.0% | 7 |
| 5 | Suspension | 1.1% | 4 |
| 6 | Noise, Emissions And Leaks | 0.9% | 3 |
| 7 | Body, Chassis, Structure | 0.6% | 2 |
| 8 | Non-component Advisories | 0.6% | 2 |
| 9 | Identification Of The Vehicle | 0.6% | 2 |
| 10 | Lamps, Reflectors And Electrical Equipment | 0.3% | 1 |
Failures per 10,000 Miles
avg. 26,256 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 | 6.09 | 16.0% | 56 |
| Wheels | 3.26 | 8.6% | 30 |
| Brakes | 1.52 | 4.0% | 14 |
| Visibility | 0.76 | 2.0% | 7 |
| Suspension | 0.44 | 1.1% | 4 |
| Noise, emissions and leaks | 0.33 | 0.9% | 3 |
| Body & Structure | 0.22 | 0.6% | 2 |
| Non-component advisories | 0.22 | 0.6% | 2 |
| Identification of the vehicle | 0.22 | 0.6% | 2 |
| Lamps & Electrical | 0.11 | 0.3% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2021 Mercedes-Benz Cls400 Amg Ln Nt Ed Prm+ D 4ma has an MOT pass rate of 82.9% based on 350 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 26,256 miles on the odometer. With a 17.1% failure rate, the 2021 Cls400 Amg Ln Nt Ed Prm+ D 4ma is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 2021 Mercedes-Benz Cls400 Amg Ln Nt Ed Prm+ D 4ma, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to tyres: 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. With relatively low average mileage of 26,256 miles, many of these vehicles are still in good mechanical condition.
Tyres — 16.0% of failures
Tyres issues account for 16.0% of MOT failures on 2021 Mercedes-Benz Cls400 Amg Ln Nt Ed Prm+ D 4ma models. 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.
Road Wheels — 8.6% of failures
Road Wheels issues account for 8.6% of MOT failures on 2021 Mercedes-Benz Cls400 Amg Ln Nt Ed Prm+ D 4ma models. Wheel failures include cracked or severely corroded alloy wheels, missing or loose wheel nuts, and wheels that are insecurely attached. These are safety-critical and relatively rare compared to tyre failures. Typical repair costs: £100–400 per wheel. Pre-MOT check: Visually inspect wheels for cracks, especially around the spokes and rim. Check that all wheel nuts are present and tightened. Look for signs of impact damage on alloy wheels.
Brakes — 4.0% of failures
Brakes issues account for 4.0% of MOT failures on 2021 Mercedes-Benz Cls400 Amg Ln Nt Ed Prm+ D 4ma models. 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).
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.