1999 Mercedes Sl 280 — MOT History by Age

How cars manufactured in 1999 perform at MOT as they age

27 years

Current Age

80.5%

Latest Pass Rate

1,492

Total Tests (All Years)

81,078 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 1999 Mercedes Sl 280 as it ages.

10 yrs79.4%

→ ↑0.9%

11 yrs80.3%

→ ↓1.6%

12 yrs78.7%

→ ↓0.0%

13 yrs78.7%

→ ↓7.2%

14 yrs71.5%

→ ↑5.9%

15 yrs77.4%

→ ↑0.7%

16 yrs78.1%

→ ↓0.1%

17 yrs78.0%

→ ↑6.2%

18 yrs84.2%

→ ↓0.9%

19 yrs83.3%

→ ↓3.3%

20 yrs80.0%

→ ↑0.5%

21 yrs80.5%

📊 View as table

Age	Pass Rate	Tests
10 yrs	79.4%	155
11 yrs	80.3%	147
12 yrs	78.7%	150
13 yrs	78.7%	141
14 yrs	71.5%	137
15 yrs	77.4%	137
16 yrs	78.1%	137
17 yrs	78.0%	132
18 yrs	84.2%	114
19 yrs	83.3%	90
20 yrs	80.0%	75
21 yrs	80.5%	77

Pass Rate Trend

How the 1999 Mercedes Sl 280 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2020 (21 yrs)	80.5%	77
2019 (20 yrs)	80%	75
2018 (19 yrs)	83.3%	90
2017 (18 yrs)	84.2%	114
2016 (17 yrs)	78%	132
2015 (16 yrs)	78.1%	137
2014 (15 yrs)	77.4%	137
2013 (14 yrs)	71.5%	137
2012 (13 yrs)	78.7%	141
2011 (12 yrs)	78.7%	150
2010 (11 yrs)	80.3%	147
2009 (10 yrs)	79.4%	155

Year-by-Year MOT Results

2009

79.4%

Age (yrs) 10Tests 155Avg Mileage 62,761Top Failure Tyres — 8.4%

2010

80.3%

Age (yrs) 11Tests 147Avg Mileage 65,836Top Failure Brakes — 10.2%

2011

78.7%

Age (yrs) 12Tests 150Avg Mileage 69,195Top Failure Brakes — 10.7%

2012

78.7%

Age (yrs) 13Tests 141Avg Mileage 71,120Top Failure Lamps, Reflectors and Electrical Equipment — 12.1%

2013

71.5%

Age (yrs) 14Tests 137Avg Mileage 72,682Top Failure Lamps, Reflectors and Electrical Equipment — 35.0%

2014

77.4%

Age (yrs) 15Tests 137Avg Mileage 77,629Top Failure Brakes — 26.3%

2015

78.1%

Age (yrs) 16Tests 137Avg Mileage 80,039Top Failure Brakes — 29.9%

2016

78.0%

Age (yrs) 17Tests 132Avg Mileage 80,776Top Failure Brakes — 18.2%

2017

84.2%

Age (yrs) 18Tests 114Avg Mileage 80,428Top Failure Lamps, Reflectors and Electrical Equipment — 15.8%

2018

83.3%

Age (yrs) 19Tests 90Avg Mileage 80,277Top Failure Brakes — 25.6%

2019

80.0%

Age (yrs) 20Tests 75Avg Mileage 81,861Top Failure Suspension — 16.0%

2020

80.5%

Age (yrs) 21Tests 77Avg Mileage 81,078Top Failure Suspension — 20.8%

MOT results for 1999 Mercedes Sl 280 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	10	79.4%	155	62,761	Tyres — 8.4%
2010	11	80.3%	147	65,836	Brakes — 10.2%
2011	12	78.7%	150	69,195	Brakes — 10.7%
2012	13	78.7%	141	71,120	Lamps, Reflectors and Electrical Equipment — 12.1%
2013	14	71.5%	137	72,682	Lamps, Reflectors and Electrical Equipment — 35.0%
2014	15	77.4%	137	77,629	Brakes — 26.3%
2015	16	78.1%	137	80,039	Brakes — 29.9%
2016	17	78.0%	132	80,776	Brakes — 18.2%
2017	18	84.2%	114	80,428	Lamps, Reflectors and Electrical Equipment — 15.8%
2018	19	83.3%	90	80,277	Brakes — 25.6%
2019	20	80.0%	75	81,861	Suspension — 16.0%
2020	21	80.5%	77	81,078	Suspension — 20.8%

Common MOT Failures

Top failure categories across all test years for 1999 Mercedes Sl 280, with age trends.

Brakes

16.1%

↑ Increases with age

Lamps, Reflectors and Electrical Equipment

15.0%

↑ Increases with age

Suspension

12.1%

↑ Increases with age

Tyres

9.9%

— Consistent

Lamps, reflectors and electrical equipment

9.9%

↑ 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
Suspension	4.5% (10 yrs)	20.8% (21 yrs)	+16.3%	🔴 ↑
Brakes	5.2% (10 yrs)	18.2% (21 yrs)	+13.0%	🔴 ↑
Tyres	8.4% (10 yrs)	6.5% (21 yrs)	-1.9%	⚪ —

Other Manufacture Years

1993 1994 1995 1996 1997 1998 1999 2000 2001

← Back to Mercedes Sl 280 overview

Looking for the best year to buy? See the full comparison on the Mercedes Sl 280 page →

About This Data

This page shows how Mercedes Sl 280 cars manufactured in 1999 perform at MOT as they age. Data spans from 2009 to 2020, covering 1,492 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.