2004 Mercedes Slk 350 Auto — MOT History by Age
How cars manufactured in 2004 perform at MOT as they age
Data from official DVSA MOT testing records
Compared to Average at Age 12
✅ 20.7% above average (13966 models compared)
How This Car Ages
Pass rate progression for the 2004 Mercedes Slk 350 Auto as it ages.
Bar chart showing pass rate by car age from 5 to 12 years
📊 View as table
| Age | Pass Rate | Tests |
|---|---|---|
| 5 yrs | 81.7% | 82 |
| 6 yrs | 89.0% | 73 |
| 7 yrs | 77.6% | 85 |
| 8 yrs | 81.6% | 87 |
| 9 yrs | 70.7% | 82 |
| 10 yrs | 81.5% | 81 |
| 11 yrs | 75.6% | 82 |
| 12 yrs | 75.0% | 84 |
Pass Rate Trend
How the 2004 Mercedes Slk 350 Auto pass rate changes as it ages, from first MOT to most recent.
Trend shows declining over 8 years
📊 View as table
| Built | Pass Rate | Tests |
|---|---|---|
| 2016 (12 yrs) | 75% | 84 |
| 2015 (11 yrs) | 75.6% | 82 |
| 2014 (10 yrs) | 81.5% | 81 |
| 2013 (9 yrs) | 70.7% | 82 |
| 2012 (8 yrs) | 81.6% | 87 |
| 2011 (7 yrs) | 77.6% | 85 |
| 2010 (6 yrs) | 89% | 73 |
| 2009 (5 yrs) | 81.7% | 82 |
Year-by-Year MOT Results
Common MOT Failures
Top failure categories across all test years for 2004 Mercedes Slk 350 Auto, with age trends.
How Failures Change With Age
Comparing failure rates between the youngest and oldest test years.
| Category | At Youngest | At Oldest | Change | Trend |
|---|---|---|---|---|
| Lamps, Reflectors and Electrical Equipment | 6.1% (5 yrs) | 19.0% (12 yrs) | +12.9%
| 🔴 ↑ |
| Suspension | 3.7% (5 yrs) | 15.5% (12 yrs) | +11.8%
| 🔴 ↑ |
| Tyres | 8.5% (5 yrs) | 14.3% (12 yrs) | +5.8%
| 🔴 ↑ |
| Brakes | 6.1% (5 yrs) | 8.3% (12 yrs) | +2.2%
| 🔴 ↑ |
Other Manufacture Years
Looking for the best year to buy? See the full comparison on the Mercedes Slk 350 Auto page →
About This Data
This page shows how Mercedes Slk 350 Auto cars manufactured in 2004 perform at MOT as they age. Data spans from 2009 to 2016, covering 656 tests. Pass rates naturally decline with age as components wear.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.