Mercedes Unclassified
Reliability, running costs, and MOT data across 32 years from 5,751 real MOT tests.
Avg Pass Rate
82%
Total Tests
5,751
Best Year
2021 (96%)
Years Covered
32
How reliable is the Mercedes Unclassified?
Mercedes Unclassified by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2021 | 96% | 270 | 14,108 mi |
| 2020 | 93% | 237 | 17,059 mi |
| 2019 | 95% | 176 | 25,080 mi |
| 2018 | 92% | 202 | 40,291 mi |
| 2017 | 91% | 200 | 39,620 mi |
| 2016 | 87% | 326 | 45,907 mi |
| 2015 | 91% | 252 | 72,531 mi |
| 2014 | 86% | 289 | 83,046 mi |
| 2013 | 89% | 245 | 52,132 mi |
| 2012 | 89% | 185 | 66,863 mi |
| 2011 | 90% | 126 | 63,066 mi |
| 2010 | 92% | 98 | 94,655 mi |
| 2009 | 79% | 174 | 100,957 mi |
| 2008 | 79% | 354 | 111,482 mi |
| 2007 | 81% | 259 | 105,351 mi |
| 2006 | 81% | 240 | 95,112 mi |
| 2005 | 79% | 273 | 101,492 mi |
| 2004 | 79% | 298 | 91,119 mi |
| 2003 | 73% | 178 | 102,840 mi |
| 2002 | 84% | 214 | 129,941 mi |
| 2001 | 73% | 107 | 121,123 mi |
| 2000 | 73% | 195 | 116,472 mi |
| 1999 | 78% | 223 | 144,511 mi |
| 1998 | 81% | 155 | 139,571 mi |
| 1997 | 66% | 65 | 104,116 mi |
| 1996 | 66% | 101 | 175,170 mi |
| 1995 | 78% | 45 | 212,804 mi |
| 1994 | 74% | 86 | 85,110 mi |
| 1993 | 89% | 47 | 159,142 mi |
| 1992 | 60% | 40 | 117,020 mi |
| 1991 | 73% | 33 | 102,932 mi |
| 1990 | 83% | 58 | 95,507 mi |
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About the Mercedes Unclassified
The Mercedes Unclassified has been tested 5,751 times in 2024 MOT data across 32 model years (1990 to 2021), with an average pass rate of 82%. That's close to the national average of 82%. Available as diesel and petrol.
Best and Worst Years
The 2021 model is the most reliable with a 96% pass rate from 270 tests. The 1992 model has the lowest at 60%. With a 36 point spread, choosing the right year makes a big difference to reliability.
Reliability Trend
Newer MERCEDES UNCLASSIFIEDs show better MOT pass rates than older ones, with an average improvement of 13 percentage points.
Mileage Across Years
The oldest model in our data (1990) averages 95,507 miles, while the newest (2021) averages 14,108 miles.
Compared to the Mercedes brand average of 87%, the Unclassified is 5 points lower, placing it among the less reliable Mercedes models.
Click any year in the table above to see detailed running costs, individual reliability data, and comparisons with similar cars.