2021 Mercedes-Benz Auto-sleepers MOT Pass Rate
Pass rate for Auto-sleepers models manufactured in 2021, based on 34 real MOT test results.
Data from official DVSA MOT testing records
This page shows all Auto-sleepers cars tested in 2021. Want to see how cars built in 2021 hold up over time?
View 2021 Mercedes-Benz Auto-sleepers vintage page → (81.8% current pass rate)2021 Mercedes-Benz Auto-sleepers MOT Analysis
The 2021 Mercedes-Benz Auto-sleepers has an MOT pass rate of 82.4% based on 34 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 7,927 miles on the odometer. With a 17.6% failure rate, the 2021 Auto-sleepers is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 2021 Mercedes-Benz Auto-sleepers is Lamps, reflectors and electrical equipment, responsible for 20.6% of failures. 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 range from £5–50. Brakes is the second most common issue at 11.8%. Identification of the vehicle follows at 5.9%.
Top failures specific to 2021 models only. The overall Auto-sleepers 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 | Lamps, Reflectors And Electrical Equipment | 20.6% | 7 |
| 2 | Brakes | 11.8% | 4 |
| 3 | Identification Of The Vehicle | 5.9% | 2 |
Failures per 10,000 Miles
avg. 7,927 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 |
|---|---|---|---|
| Lamps & Electrical | 25.97 | 20.6% | 7 |
| Brakes | 14.84 | 11.8% | 4 |
| Identification of the vehicle | 7.42 | 5.9% | 2 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2021 Mercedes-Benz Auto-sleepers has an MOT pass rate of 82.4% based on 34 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 7,927 miles on the odometer. With a 17.6% failure rate, the 2021 Auto-sleepers is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 2021 Mercedes-Benz Auto-sleepers, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to lamps, reflectors and electrical equipment: 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. With relatively low average mileage of 7,927 miles, many of these vehicles are still in good mechanical condition.
Lamps, reflectors and electrical equipment — 20.6% of failures
Lamps, reflectors and electrical equipment issues account for 20.6% of MOT failures on 2021 Mercedes-Benz Auto-sleepers models. 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 — 11.8% of failures
Brakes issues account for 11.8% of MOT failures on 2021 Mercedes-Benz Auto-sleepers 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).
Identification of the vehicle — 5.9% of failures
Identification of the vehicle issues account for 5.9% of MOT failures on 2021 Mercedes-Benz Auto-sleepers models. Identification failures relate to the Vehicle Identification Number (VIN) and registration plate. The VIN must be permanently displayed and legible, and the registration plate must meet British Standard formatting. Typical repair costs: £10–50. Pre-MOT check: Ensure the VIN plate is visible and legible (usually in the windscreen or under the bonnet). Check that number plates are clean, undamaged, and use the correct font and spacing.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.