2003 Mercedes Slk 320 — MOT History by Age

How cars manufactured in 2003 perform at MOT as they age

23 years

Current Age

68.1%

Latest Pass Rate

3,382

Total Tests (All Years)

82,596 mi

Avg Mileage (Latest)

Data from official DVSA MOT testing records

Compared to Average at Age 17

This car: 68.1%

Average: 53.5%

✅ 14.6% above average (9249 models compared)

How This Car Ages

Pass rate progression for the 2003 Mercedes Slk 320 as it ages.

6 yrs79.6%

→ ↓1.7%

7 yrs77.9%

→ ↑1.4%

8 yrs79.3%

→ ↓4.4%

9 yrs74.9%

→ ↓2.4%

10 yrs72.5%

→ ↓2.3%

11 yrs70.2%

→ ↑3.4%

12 yrs73.6%

→ ↓2.6%

13 yrs71.0%

→ ↓0.3%

14 yrs70.7%

→ ↑1.9%

15 yrs72.6%

→ ↓12.3%

16 yrs60.3%

→ ↑7.8%

17 yrs68.1%

📊 View as table

Age	Pass Rate	Tests
6 yrs	79.6%	382
7 yrs	77.9%	384
8 yrs	79.3%	386
9 yrs	74.9%	387
10 yrs	72.5%	386
11 yrs	70.2%	373
12 yrs	73.6%	371
13 yrs	71.0%	366
14 yrs	70.7%	116
15 yrs	72.6%	84
16 yrs	60.3%	78
17 yrs	68.1%	69

Pass Rate Trend

How the 2003 Mercedes Slk 320 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2020 (17 yrs)	68.1%	69
2019 (16 yrs)	60.3%	78
2018 (15 yrs)	72.6%	84
2017 (14 yrs)	70.7%	116
2016 (13 yrs)	71%	366
2015 (12 yrs)	73.6%	371
2014 (11 yrs)	70.2%	373
2013 (10 yrs)	72.5%	386
2012 (9 yrs)	74.9%	387
2011 (8 yrs)	79.3%	386
2010 (7 yrs)	77.9%	384
2009 (6 yrs)	79.6%	382

Year-by-Year MOT Results

2009

79.6%

Age (yrs) 6Tests 382Avg Mileage 40,359Top Failure Tyres — 7.9%

2010

77.9%

Age (yrs) 7Tests 384Avg Mileage 44,273Top Failure Lamps, Reflectors and Electrical Equipment — 10.7%

2011

79.3%

Age (yrs) 8Tests 386Avg Mileage 49,694Top Failure Lamps, Reflectors and Electrical Equipment — 10.9%

2012

74.9%

Age (yrs) 9Tests 387Avg Mileage 53,616Top Failure Tyres — 10.1%

2013

72.5%

Age (yrs) 10Tests 386Avg Mileage 59,169Top Failure Lamps, Reflectors and Electrical Equipment — 22.0%

2014

70.2%

Age (yrs) 11Tests 373Avg Mileage 60,509Top Failure Lamps, Reflectors and Electrical Equipment — 24.4%

2015

73.6%

Age (yrs) 12Tests 371Avg Mileage 65,251Top Failure Lamps, Reflectors and Electrical Equipment — 21.0%

2016

71.0%

Age (yrs) 13Tests 366Avg Mileage 67,728Top Failure Lamps, Reflectors and Electrical Equipment — 23.5%

2017

70.7%

Age (yrs) 14Tests 116Avg Mileage 72,635Top Failure Lamps, Reflectors and Electrical Equipment — 27.6%

2018

72.6%

Age (yrs) 15Tests 84Avg Mileage 75,740Top Failure Brakes — 15.5%

2019High Fail Rate

60.3%

Age (yrs) 16Tests 78Avg Mileage 79,577Top Failure Brakes — 41.0%

2020

68.1%

Age (yrs) 17Tests 69Avg Mileage 82,596Top Failure Lamps, reflectors and electrical equipment — 34.8%

MOT results for 2003 Mercedes Slk 320 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	6	79.6%	382	40,359	Tyres — 7.9%
2010	7	77.9%	384	44,273	Lamps, Reflectors and Electrical Equipment — 10.7%
2011	8	79.3%	386	49,694	Lamps, Reflectors and Electrical Equipment — 10.9%
2012	9	74.9%	387	53,616	Tyres — 10.1%
2013	10	72.5%	386	59,169	Lamps, Reflectors and Electrical Equipment — 22.0%
2014	11	70.2%	373	60,509	Lamps, Reflectors and Electrical Equipment — 24.4%
2015	12	73.6%	371	65,251	Lamps, Reflectors and Electrical Equipment — 21.0%
2016	13	71.0%	366	67,728	Lamps, Reflectors and Electrical Equipment — 23.5%
2017	14	70.7%	116	72,635	Lamps, Reflectors and Electrical Equipment — 27.6%
2018	15	72.6%	84	75,740	Brakes — 15.5%
2019	16	60.3%	78	79,577	Brakes — 41.0%
2020	17	68.1%	69	82,596	Lamps, reflectors and electrical equipment — 34.8%

Common MOT Failures

Top failure categories across all test years for 2003 Mercedes Slk 320, with age trends.

Lamps, reflectors and electrical equipment

25.4%

↑ Increases with age

Lamps, Reflectors and Electrical Equipment

17.0%

↑ Increases with age

Brakes

16.3%

↑ Increases with age

Tyres

15.0%

↑ Increases with age

Suspension

14.7%

↑ 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	5.5% (6 yrs)	29.0% (17 yrs)	+23.5%	🔴 ↑
Tyres	7.9% (6 yrs)	20.3% (17 yrs)	+12.4%	🔴 ↑
Suspension	5.8% (6 yrs)	13.0% (17 yrs)	+7.2%	🔴 ↑

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 2003 perform at MOT as they age. Data spans from 2009 to 2020, covering 3,382 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.