Mercedes-benz Unknown Reliability, MOT Pass Rate & Common Faults
Free Mercedes-benz Unknown car check
Is the Mercedes-benz Unknown reliable? We analysed 8,259 real MOT tests across 2,333 vehicles to find out.
Got a specific Mercedes-benz Unknown? Enter the reg for a free check:
The Mercedes-benz Unknown is above average for reliability based on real UK MOT data. Here's everything you need to know before buying a used Mercedes-benz Unknown.
Mercedes-benz Unknown Number Plates
Number plates registered to a Mercedes-benz Unknown. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Mercedes-benz Unknown MOT Pass Rate by Year
How likely is a Mercedes-benz Unknown to pass its MOT? Here's the pass rate for each registration year, newest first.
Mercedes-benz Unknown Common Faults & Problems
These are the most common serious faults found on Mercedes-benz Unknown models during MOT testing — flagged as dangerous or major failures that need immediate attention.
Mercedes-benz Unknown Mileage — What's Normal?
How many miles does a typical Mercedes-benz Unknown owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Mercedes-benz Unknown MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Mercedes-benz Unknown year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2022 | 129 | 86.0% | 9,505 | 15,891 | 26,669 |
| 2021 | 115 | 93.0% | 9,944 | 13,306 | 25,002 |
| 2020 | 239 | 81.6% | 15,118 | 36,179 | 84,474 |
| 2019 | 258 | 88.0% | 11,539 | 23,584 | 53,334 |
| 2018 | 272 | 90.8% | 13,566 | 29,892 | 64,977 |
| 2017 | 301 | 92.0% | 14,794 | 34,118 | 72,748 |
| 2016 | 684 | 83.8% | 27,983 | 59,176 | 106,958 |
| 2015 | 794 | 83.9% | 20,782 | 41,137 | 98,950 |
| 2014 | 2,037 | 82.4% | 50,213 | 97,630 | 152,351 |
| 2013 | 820 | 83.2% | 25,707 | 41,182 | 66,348 |
| 2012 | 129 | 85.3% | 50,959 | 76,539 | 113,461 |
| 2011 | 87 | 80.5% | 42,362 | 56,815 | 74,579 |
| 2008 | 134 | 76.1% | 45,750 | 72,819 | 121,209 |
| 2007 | 56 | 87.5% | 59,484 | 73,608 | 113,102 |
| 2006 | 116 | 77.6% | 50,037 | 72,364 | 127,116 |
| 2005 | 114 | 74.6% | 45,376 | 77,344 | 110,739 |
| 2004 | 136 | 75.7% | 44,669 | 72,031 | 91,402 |
| 2002 | 68 | 86.8% | 58,216 | 94,850 | 151,560 |
How Long Does a Mercedes-benz Unknown Last?
Based on 2,333 Mercedes-benz Unknown vehicles on UK roads.
Mercedes-benz Unknown Mileage Distribution
Total mileage recorded across all Mercedes-benz Unknown MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Mercedes-benz Unknown
Based on MOT pass rates across all registration years with sufficient test data.
93.0% MOT pass rate from 115 tests
74.6% MOT pass rate from 114 tests
The best year to buy a used Mercedes-benz Unknown is 2021, which has the highest MOT pass rate at 93.0% across 115 tests. The 2005 model year has the lowest pass rate at 74.6% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Mercedes-benz Unknown Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Mercedes-benz Unknown THIS CAR | 84.7% | 8,259 | 68,834 mi | 22 yrs |
| Mercedes-benz C | 77.6% | 8,031,355 | 77,082 mi | 32 yrs |
| Mercedes-benz E | 79.4% | 4,722,746 | 83,960 mi | 33 yrs |
| Mercedes-benz A-class | 77.6% | 4,204,702 | 57,023 mi | 28 yrs |
| Vauxhall Astra Business Edition Nav T D | 85.5% | 5,387 | 44,536 mi | — yrs |
Compared to the Mercedes-benz C (77.6% pass rate) and the Mercedes-benz E (79.4% pass rate), the Mercedes-benz Unknown outperforms both on MOT reliability.
Found a Mercedes-benz Unknown you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Mercedes-benz UnknownShould you buy a used Mercedes-benz Unknown?
The Mercedes-benz Unknown has an overall MOT pass rate of 84.7% across 8,259 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
On the safety side, the most frequently flagged dangerous fault is tyre tread depth below requirements of 1.6mm. Dangerous faults cause an immediate MOT failure and mean the vehicle is not roadworthy until repaired. If you're viewing a Mercedes-benz Unknown with an expired or recently passed MOT, ask the seller whether any dangerous faults were found and fixed during the last test.
A typical Mercedes-benz Unknown owner drives around 5,597 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Mercedes-benz Unknown models stay on UK roads for around 22 years — a strong showing that suggests solid build quality and readily available parts. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.