2004 Mercedes Slk 320 — MOT History by Age

How cars manufactured in 2004 perform at MOT as they age

22 years

Current Age

79.4%

Latest Pass Rate

1,572

Total Tests (All Years)

76,354 mi

Avg Mileage (Latest)

Data from official DVSA MOT testing records

Compared to Average at Age 16

This car: 79.4%

Average: 52.7%

✅ 26.7% above average (10212 models compared)

How This Car Ages

Pass rate progression for the 2004 Mercedes Slk 320 as it ages.

5 yrs79.3%

→ ↑3.6%

6 yrs82.9%

→ ↓4.8%

7 yrs78.1%

→ ↓1.4%

8 yrs76.7%

→ ↓3.9%

9 yrs72.8%

→ ↑0.2%

10 yrs73.0%

→ ↓0.2%

11 yrs72.8%

→ ↑9.8%

12 yrs82.6%

→ ↓10.9%

13 yrs71.7%

→ ↓6.8%

14 yrs64.9%

→ ↓9.3%

15 yrs55.6%

→ ↑23.8%

16 yrs79.4%

📊 View as table

Age	Pass Rate	Tests
5 yrs	79.3%	179
6 yrs	82.9%	175
7 yrs	78.1%	178
8 yrs	76.7%	180
9 yrs	72.8%	184
10 yrs	73.0%	178
11 yrs	72.8%	173
12 yrs	82.6%	172
13 yrs	71.7%	46
14 yrs	64.9%	37
15 yrs	55.6%	36
16 yrs	79.4%	34

Pass Rate Trend

How the 2004 Mercedes Slk 320 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2020 (16 yrs)	79.4%	34
2019 (15 yrs)	55.6%	36
2018 (14 yrs)	64.9%	37
2017 (13 yrs)	71.7%	46
2016 (12 yrs)	82.6%	172
2015 (11 yrs)	72.8%	173
2014 (10 yrs)	73%	178
2013 (9 yrs)	72.8%	184
2012 (8 yrs)	76.7%	180
2011 (7 yrs)	78.1%	178
2010 (6 yrs)	82.9%	175
2009 (5 yrs)	79.3%	179

Year-by-Year MOT Results

2009

79.3%

Age (yrs) 5Tests 179Avg Mileage 34,615Top Failure Lamps, Reflectors and Electrical Equipment — 11.7%

2010

82.9%

Age (yrs) 6Tests 175Avg Mileage 38,982Top Failure Tyres — 9.1%

2011

78.1%

Age (yrs) 7Tests 178Avg Mileage 43,973Top Failure Lamps, Reflectors and Electrical Equipment — 8.4%

2012

76.7%

Age (yrs) 8Tests 180Avg Mileage 49,432Top Failure Lamps, Reflectors and Electrical Equipment — 10.6%

2013

72.8%

Age (yrs) 9Tests 184Avg Mileage 54,352Top Failure Lamps, Reflectors and Electrical Equipment — 17.4%

2014

73.0%

Age (yrs) 10Tests 178Avg Mileage 58,289Top Failure Suspension — 27.0%

2015

72.8%

Age (yrs) 11Tests 173Avg Mileage 66,306Top Failure Brakes — 25.4%

2016

82.6%

Age (yrs) 12Tests 172Avg Mileage 69,499Top Failure Suspension — 19.8%

2017

71.7%

Age (yrs) 13Tests 46Avg Mileage 70,522Top Failure Suspension — 37.0%

2018High Fail Rate

64.9%

Age (yrs) 14Tests 37Avg Mileage 80,735Top Failure Suspension — 43.2%

2019High Fail Rate

55.6%

Age (yrs) 15Tests 36Avg Mileage 77,166Top Failure Brakes — 69.4%

2020

79.4%

Age (yrs) 16Tests 34Avg Mileage 76,354Top Failure Tyres — 23.5%

MOT results for 2004 Mercedes Slk 320 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	5	79.3%	179	34,615	Lamps, Reflectors and Electrical Equipment — 11.7%
2010	6	82.9%	175	38,982	Tyres — 9.1%
2011	7	78.1%	178	43,973	Lamps, Reflectors and Electrical Equipment — 8.4%
2012	8	76.7%	180	49,432	Lamps, Reflectors and Electrical Equipment — 10.6%
2013	9	72.8%	184	54,352	Lamps, Reflectors and Electrical Equipment — 17.4%
2014	10	73.0%	178	58,289	Suspension — 27.0%
2015	11	72.8%	173	66,306	Brakes — 25.4%
2016	12	82.6%	172	69,499	Suspension — 19.8%
2017	13	71.7%	46	70,522	Suspension — 37.0%
2018	14	64.9%	37	80,735	Suspension — 43.2%
2019	15	55.6%	36	77,166	Brakes — 69.4%
2020	16	79.4%	34	76,354	Tyres — 23.5%

Common MOT Failures

Top failure categories across all test years for 2004 Mercedes Slk 320, with age trends.

Suspension

20.9%

↑ Increases with age

Brakes

18.9%

↑ Increases with age

Noise, emissions and leaks

16.7%

— Consistent

Tyres

16.6%

↑ Increases with age

Lamps, Reflectors and Electrical Equipment

14.2%

↓ Decreases with age

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Tyres	7.8% (5 yrs)	23.5% (16 yrs)	+15.7%	🔴 ↑
Suspension	7.3% (5 yrs)	20.6% (16 yrs)	+13.3%	🔴 ↑
Brakes	2.2% (5 yrs)	11.8% (16 yrs)	+9.6%	🔴 ↑

Other Manufacture Years

2000 2001 2002 2003 2004 2010

← Back to Mercedes Slk 320 overview

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About This Data

This page shows how Mercedes Slk 320 cars manufactured in 2004 perform at MOT as they age. Data spans from 2009 to 2020, covering 1,572 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.