1998 Mercedes Slk 230k — MOT History by Age

How cars manufactured in 1998 perform at MOT as they age

28 years

Current Age

66.6%

Latest Pass Rate

28,118

Total Tests (All Years)

92,595 mi

Avg Mileage (Latest)

Data from official DVSA MOT testing records

Insufficient data for same-age comparison.

How This Car Ages

Pass rate progression for the 1998 Mercedes Slk 230k as it ages.

11 yrs68.3%

→ ↑0.2%

12 yrs68.5%

→ ↓0.9%

13 yrs67.6%

→ ↓1.1%

14 yrs66.5%

→ ↓2.2%

15 yrs64.3%

→ ↑0.3%

16 yrs64.6%

→ ↑0.3%

17 yrs64.9%

→ ↑1.2%

18 yrs66.1%

→ ↓0.2%

19 yrs65.9%

→ ↑1.7%

20 yrs67.6%

→ ↓3.5%

21 yrs64.1%

→ ↑2.5%

22 yrs66.6%

📊 View as table

Age	Pass Rate	Tests
11 yrs	68.3%	2,958
12 yrs	68.5%	2,820
13 yrs	67.6%	2,880
14 yrs	66.5%	2,756
15 yrs	64.3%	2,714
16 yrs	64.6%	2,655
17 yrs	64.9%	2,556
18 yrs	66.1%	2,414
19 yrs	65.9%	2,252
20 yrs	67.6%	1,480
21 yrs	64.1%	1,413
22 yrs	66.6%	1,220

Pass Rate Trend

How the 1998 Mercedes Slk 230k pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2020 (22 yrs)	66.6%	1,220
2019 (21 yrs)	64.1%	1,413
2018 (20 yrs)	67.6%	1,480
2017 (19 yrs)	65.9%	2,252
2016 (18 yrs)	66.1%	2,414
2015 (17 yrs)	64.9%	2,556
2014 (16 yrs)	64.6%	2,655
2013 (15 yrs)	64.3%	2,714
2012 (14 yrs)	66.5%	2,756
2011 (13 yrs)	67.6%	2,880
2010 (12 yrs)	68.5%	2,820
2009 (11 yrs)	68.3%	2,958

Year-by-Year MOT Results

2009

68.3%

Age (yrs) 11Tests 2,958Avg Mileage 68,466Top Failure Lamps, Reflectors and Electrical Equipment — 19.6%

2010

68.5%

Age (yrs) 12Tests 2,820Avg Mileage 72,911Top Failure Lamps, Reflectors and Electrical Equipment — 19.6%

2011

67.6%

Age (yrs) 13Tests 2,880Avg Mileage 76,788Top Failure Lamps, Reflectors and Electrical Equipment — 20.7%

2012

66.5%

Age (yrs) 14Tests 2,756Avg Mileage 79,554Top Failure Lamps, Reflectors and Electrical Equipment — 21.9%

2013High Fail Rate

64.3%

Age (yrs) 15Tests 2,714Avg Mileage 83,095Top Failure Lamps, Reflectors and Electrical Equipment — 50.4%

2014High Fail Rate

64.6%

Age (yrs) 16Tests 2,655Avg Mileage 86,188Top Failure Lamps, Reflectors and Electrical Equipment — 48.4%

2015High Fail Rate

64.9%

Age (yrs) 17Tests 2,556Avg Mileage 87,932Top Failure Lamps, Reflectors and Electrical Equipment — 50.9%

2016

66.1%

Age (yrs) 18Tests 2,414Avg Mileage 89,941Top Failure Lamps, Reflectors and Electrical Equipment — 47.5%

2017

65.9%

Age (yrs) 19Tests 2,252Avg Mileage 91,730Top Failure Lamps, Reflectors and Electrical Equipment — 48.8%

2018

67.6%

Age (yrs) 20Tests 1,480Avg Mileage 92,417Top Failure Brakes — 32.4%

2019High Fail Rate

64.1%

Age (yrs) 21Tests 1,413Avg Mileage 93,610Top Failure Lamps, reflectors and electrical equipment — 47.8%

2020

66.6%

Age (yrs) 22Tests 1,220Avg Mileage 92,595Top Failure Lamps, reflectors and electrical equipment — 57.1%

MOT results for 1998 Mercedes Slk 230k by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	11	68.3%	2,958	68,466	Lamps, Reflectors and Electrical Equipment — 19.6%
2010	12	68.5%	2,820	72,911	Lamps, Reflectors and Electrical Equipment — 19.6%
2011	13	67.6%	2,880	76,788	Lamps, Reflectors and Electrical Equipment — 20.7%
2012	14	66.5%	2,756	79,554	Lamps, Reflectors and Electrical Equipment — 21.9%
2013	15	64.3%	2,714	83,095	Lamps, Reflectors and Electrical Equipment — 50.4%
2014	16	64.6%	2,655	86,188	Lamps, Reflectors and Electrical Equipment — 48.4%
2015	17	64.9%	2,556	87,932	Lamps, Reflectors and Electrical Equipment — 50.9%
2016	18	66.1%	2,414	89,941	Lamps, Reflectors and Electrical Equipment — 47.5%
2017	19	65.9%	2,252	91,730	Lamps, Reflectors and Electrical Equipment — 48.8%
2018	20	67.6%	1,480	92,417	Brakes — 32.4%
2019	21	64.1%	1,413	93,610	Lamps, reflectors and electrical equipment — 47.8%
2020	22	66.6%	1,220	92,595	Lamps, reflectors and electrical equipment — 57.1%

Common MOT Failures

Top failure categories across all test years for 1998 Mercedes Slk 230k, with age trends.

Lamps, reflectors and electrical equipment

44.9%

↑ Increases with age

Lamps, Reflectors and Electrical Equipment

34.6%

— Consistent

Brakes

27.5%

↑ Increases with age

Suspension

20.5%

↑ Increases with age

Tyres

16.4%

↑ Increases with age

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Brakes	11.5% (11 yrs)	37.0% (22 yrs)	+25.5%	🔴 ↑
Suspension	9.6% (11 yrs)	31.7% (22 yrs)	+22.1%	🔴 ↑
Tyres	10.8% (11 yrs)	22.1% (22 yrs)	+11.3%	🔴 ↑

Other Manufacture Years

1996 1997 1998 1999 2000 2001 2002 2003 2004

← Back to Mercedes Slk 230k overview

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About This Data

This page shows how Mercedes Slk 230k cars manufactured in 1998 perform at MOT as they age. Data spans from 2009 to 2020, covering 28,118 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.