2004 Mercedes Slk 350 — MOT History by Age

How cars manufactured in 2004 perform at MOT as they age

22 years

Current Age

64.9%

Latest Pass Rate

9,698

Total Tests (All Years)

75,610 mi

Avg Mileage (Latest)

Data from official DVSA MOT testing records

Compared to Average at Age 16

This car: 64.9%

Average: 52.7%

✅ 12.2% above average (10212 models compared)

How This Car Ages

Pass rate progression for the 2004 Mercedes Slk 350 as it ages.

5 yrs83.8%

→ ↑1.2%

6 yrs85.0%

→ ↓6.1%

7 yrs78.9%

→ ↑0.2%

8 yrs79.1%

→ ↓4.6%

9 yrs74.5%

→ ↓1.4%

10 yrs73.1%

→ ↑0.1%

11 yrs73.2%

→ ↓0.7%

12 yrs72.5%

→ ↓3.5%

13 yrs69.0%

→ ↑1.2%

14 yrs70.2%

→ ↓5.1%

15 yrs65.1%

→ ↓0.2%

16 yrs64.9%

📊 View as table

Age	Pass Rate	Tests
5 yrs	83.8%	1,071
6 yrs	85.0%	1,050
7 yrs	78.9%	1,098
8 yrs	79.1%	1,071
9 yrs	74.5%	1,084
10 yrs	73.1%	1,082
11 yrs	73.2%	1,062
12 yrs	72.5%	1,043
13 yrs	69.0%	358
14 yrs	70.2%	245
15 yrs	65.1%	275
16 yrs	64.9%	259

Pass Rate Trend

How the 2004 Mercedes Slk 350 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2020 (16 yrs)	64.9%	259
2019 (15 yrs)	65.1%	275
2018 (14 yrs)	70.2%	245
2017 (13 yrs)	69%	358
2016 (12 yrs)	72.5%	1,043
2015 (11 yrs)	73.2%	1,062
2014 (10 yrs)	73.1%	1,082
2013 (9 yrs)	74.5%	1,084
2012 (8 yrs)	79.1%	1,071
2011 (7 yrs)	78.9%	1,098
2010 (6 yrs)	85%	1,050
2009 (5 yrs)	83.8%	1,071

Year-by-Year MOT Results

2009

83.8%

Age (yrs) 5Tests 1,071Avg Mileage 31,817Top Failure Tyres — 8.4%

2010

85.0%

Age (yrs) 6Tests 1,050Avg Mileage 36,783Top Failure Tyres — 7.4%

2011

78.9%

Age (yrs) 7Tests 1,098Avg Mileage 41,514Top Failure Tyres — 10.3%

2012

79.1%

Age (yrs) 8Tests 1,071Avg Mileage 46,884Top Failure Tyres — 9.2%

2013

74.5%

Age (yrs) 9Tests 1,084Avg Mileage 50,865Top Failure Suspension — 18.6%

2014

73.1%

Age (yrs) 10Tests 1,082Avg Mileage 55,152Top Failure Suspension — 22.6%

2015

73.2%

Age (yrs) 11Tests 1,062Avg Mileage 59,114Top Failure Suspension — 24.4%

2016

72.5%

Age (yrs) 12Tests 1,043Avg Mileage 62,563Top Failure Suspension — 27.0%

2017

69.0%

Age (yrs) 13Tests 358Avg Mileage 66,396Top Failure Suspension — 33.8%

2018

70.2%

Age (yrs) 14Tests 245Avg Mileage 67,754Top Failure Brakes — 25.3%

2019

65.1%

Age (yrs) 15Tests 275Avg Mileage 72,817Top Failure Suspension — 39.3%

2020High Fail Rate

64.9%

Age (yrs) 16Tests 259Avg Mileage 75,610Top Failure Brakes — 47.1%

MOT results for 2004 Mercedes Slk 350 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	5	83.8%	1,071	31,817	Tyres — 8.4%
2010	6	85.0%	1,050	36,783	Tyres — 7.4%
2011	7	78.9%	1,098	41,514	Tyres — 10.3%
2012	8	79.1%	1,071	46,884	Tyres — 9.2%
2013	9	74.5%	1,084	50,865	Suspension — 18.6%
2014	10	73.1%	1,082	55,152	Suspension — 22.6%
2015	11	73.2%	1,062	59,114	Suspension — 24.4%
2016	12	72.5%	1,043	62,563	Suspension — 27.0%
2017	13	69.0%	358	66,396	Suspension — 33.8%
2018	14	70.2%	245	67,754	Brakes — 25.3%
2019	15	65.1%	275	72,817	Suspension — 39.3%
2020	16	64.9%	259	75,610	Brakes — 47.1%

Common MOT Failures

Top failure categories across all test years for 2004 Mercedes Slk 350, with age trends.

Suspension

20.7%

↑ Increases with age

Brakes

18.8%

↑ Increases with age

Lamps, reflectors and electrical equipment

18.0%

↑ Increases with age

Tyres

16.4%

↑ Increases with age

Noise, emissions and leaks

9.4%

— Consistent

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Brakes	4.8% (5 yrs)	47.1% (16 yrs)	+42.3%	🔴 ↑
Suspension	3.5% (5 yrs)	39.0% (16 yrs)	+35.5%	🔴 ↑
Tyres	8.4% (5 yrs)	29.3% (16 yrs)	+20.9%	🔴 ↑

Other Manufacture Years

2004 2005 2006 2007 2008 2009 2010 2011 2012

← Back to Mercedes Slk 350 overview

Looking for the best year to buy? See the full comparison on the Mercedes Slk 350 page →

About This Data

This page shows how Mercedes Slk 350 cars manufactured in 2004 perform at MOT as they age. Data spans from 2009 to 2020, covering 9,698 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.