2003 Mercedes Sl 350 — MOT History by Age

How cars manufactured in 2003 perform at MOT as they age

23 years

Current Age

77.0%

Latest Pass Rate

8,962

Total Tests (All Years)

78,022 mi

Avg Mileage (Latest)

Data from official DVSA MOT testing records

Compared to Average at Age 17

This car: 77.0%

Average: 53.5%

✅ 23.5% above average (9249 models compared)

How This Car Ages

Pass rate progression for the 2003 Mercedes Sl 350 as it ages.

6 yrs81.8%

→ ↓2.5%

7 yrs79.3%

→ ↑2.6%

8 yrs81.9%

→ ↓3.2%

9 yrs78.7%

→ ↓3.4%

10 yrs75.3%

→ ↑3.2%

11 yrs78.5%

→ ↓3.1%

12 yrs75.4%

→ ↑0.5%

13 yrs75.9%

→ ↑0.8%

14 yrs76.7%

→ ↓1.1%

15 yrs75.6%

→ ↓3.2%

16 yrs72.4%

→ ↑4.6%

17 yrs77.0%

📊 View as table

Age	Pass Rate	Tests
6 yrs	81.8%	1,006
7 yrs	79.3%	980
8 yrs	81.9%	969
9 yrs	78.7%	966
10 yrs	75.3%	950
11 yrs	78.5%	938
12 yrs	75.4%	938
13 yrs	75.9%	912
14 yrs	76.7%	421
15 yrs	75.6%	291
16 yrs	72.4%	308
17 yrs	77.0%	283

Pass Rate Trend

How the 2003 Mercedes Sl 350 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2020 (17 yrs)	77%	283
2019 (16 yrs)	72.4%	308
2018 (15 yrs)	75.6%	291
2017 (14 yrs)	76.7%	421
2016 (13 yrs)	75.9%	912
2015 (12 yrs)	75.4%	938
2014 (11 yrs)	78.5%	938
2013 (10 yrs)	75.3%	950
2012 (9 yrs)	78.7%	966
2011 (8 yrs)	81.9%	969
2010 (7 yrs)	79.3%	980
2009 (6 yrs)	81.8%	1,006

Year-by-Year MOT Results

2009

81.8%

Age (yrs) 6Tests 1,006Avg Mileage 38,628Top Failure Suspension — 8.3%

2010

79.3%

Age (yrs) 7Tests 980Avg Mileage 43,543Top Failure Suspension — 11.3%

2011

81.9%

Age (yrs) 8Tests 969Avg Mileage 49,139Top Failure Suspension — 10.0%

2012

78.7%

Age (yrs) 9Tests 966Avg Mileage 52,534Top Failure Suspension — 13.4%

2013

75.3%

Age (yrs) 10Tests 950Avg Mileage 56,187Top Failure Suspension — 25.9%

2014

78.5%

Age (yrs) 11Tests 938Avg Mileage 60,289Top Failure Suspension — 24.2%

2015

75.4%

Age (yrs) 12Tests 938Avg Mileage 65,326Top Failure Suspension — 24.3%

2016

75.9%

Age (yrs) 13Tests 912Avg Mileage 66,816Top Failure Suspension — 26.5%

2017

76.7%

Age (yrs) 14Tests 421Avg Mileage 69,482Top Failure Suspension — 22.3%

2018

75.6%

Age (yrs) 15Tests 291Avg Mileage 72,332Top Failure Suspension — 23.0%

2019

72.4%

Age (yrs) 16Tests 308Avg Mileage 74,790Top Failure Tyres — 22.1%

2020

77.0%

Age (yrs) 17Tests 283Avg Mileage 78,022Top Failure Brakes — 24.7%

MOT results for 2003 Mercedes Sl 350 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	6	81.8%	1,006	38,628	Suspension — 8.3%
2010	7	79.3%	980	43,543	Suspension — 11.3%
2011	8	81.9%	969	49,139	Suspension — 10.0%
2012	9	78.7%	966	52,534	Suspension — 13.4%
2013	10	75.3%	950	56,187	Suspension — 25.9%
2014	11	78.5%	938	60,289	Suspension — 24.2%
2015	12	75.4%	938	65,326	Suspension — 24.3%
2016	13	75.9%	912	66,816	Suspension — 26.5%
2017	14	76.7%	421	69,482	Suspension — 22.3%
2018	15	75.6%	291	72,332	Suspension — 23.0%
2019	16	72.4%	308	74,790	Tyres — 22.1%
2020	17	77.0%	283	78,022	Brakes — 24.7%

Common MOT Failures

Top failure categories across all test years for 2003 Mercedes Sl 350, with age trends.

Suspension

18.9%

↑ Increases with age

Brakes

14.0%

↑ Increases with age

Tyres

13.9%

↑ Increases with age

Lamps, reflectors and electrical equipment

10.2%

— Consistent

Lamps, Reflectors and Electrical Equipment

7.0%

↑ 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)	24.7% (17 yrs)	+19.2%	🔴 ↑
Suspension	8.3% (6 yrs)	20.8% (17 yrs)	+12.5%	🔴 ↑
Tyres	7.9% (6 yrs)	14.8% (17 yrs)	+6.9%	🔴 ↑

Other Manufacture Years

1979 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012

← Back to Mercedes Sl 350 overview

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

About This Data

This page shows how Mercedes Sl 350 cars manufactured in 2003 perform at MOT as they age. Data spans from 2009 to 2020, covering 8,962 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.