1999 Mercedes S 320 — MOT History by Age

How cars manufactured in 1999 perform at MOT as they age

27 years

Current Age

62.6%

Latest Pass Rate

5,920

Total Tests (All Years)

103,193 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 S 320 as it ages.

10 yrs68.0%

→ ↓0.3%

11 yrs67.7%

→ ↓4.0%

12 yrs63.7%

→ ↑0.8%

13 yrs64.5%

→ ↓2.2%

14 yrs62.3%

→ ↑0.5%

15 yrs62.8%

→ ↓4.1%

16 yrs58.7%

→ ↑1.5%

17 yrs60.2%

→ ↑3.7%

18 yrs63.9%

→ ↓1.0%

19 yrs62.9%

→ ↓3.6%

20 yrs59.3%

→ ↑3.3%

21 yrs62.6%

📊 View as table

Age	Pass Rate	Tests
10 yrs	68.0%	902
11 yrs	67.7%	844
12 yrs	63.7%	783
13 yrs	64.5%	698
14 yrs	62.3%	616
15 yrs	62.8%	516
16 yrs	58.7%	492
17 yrs	60.2%	405
18 yrs	63.9%	269
19 yrs	62.9%	151
20 yrs	59.3%	145
21 yrs	62.6%	99

Pass Rate Trend

How the 1999 Mercedes S 320 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2020 (21 yrs)	62.6%	99
2019 (20 yrs)	59.3%	145
2018 (19 yrs)	62.9%	151
2017 (18 yrs)	63.9%	269
2016 (17 yrs)	60.2%	405
2015 (16 yrs)	58.7%	492
2014 (15 yrs)	62.8%	516
2013 (14 yrs)	62.3%	616
2012 (13 yrs)	64.5%	698
2011 (12 yrs)	63.7%	783
2010 (11 yrs)	67.7%	844
2009 (10 yrs)	68%	902

Year-by-Year MOT Results

2009

68.0%

Age (yrs) 10Tests 902Avg Mileage 95,590Top Failure Brakes — 16.0%

2010

67.7%

Age (yrs) 11Tests 844Avg Mileage 100,069Top Failure Lamps, Reflectors and Electrical Equipment — 17.3%

2011High Fail Rate

63.7%

Age (yrs) 12Tests 783Avg Mileage 102,567Top Failure Lamps, Reflectors and Electrical Equipment — 19.2%

2012High Fail Rate

64.5%

Age (yrs) 13Tests 698Avg Mileage 104,377Top Failure Suspension — 19.9%

2013High Fail Rate

62.3%

Age (yrs) 14Tests 616Avg Mileage 106,808Top Failure Brakes — 49.7%

2014High Fail Rate

62.8%

Age (yrs) 15Tests 516Avg Mileage 106,971Top Failure Suspension — 40.5%

2015High Fail Rate

58.7%

Age (yrs) 16Tests 492Avg Mileage 111,593Top Failure Brakes — 51.8%

2016High Fail Rate

60.2%

Age (yrs) 17Tests 405Avg Mileage 109,674Top Failure Brakes — 50.4%

2017High Fail Rate

63.9%

Age (yrs) 18Tests 269Avg Mileage 107,291Top Failure Brakes — 52.4%

2018High Fail Rate

62.9%

Age (yrs) 19Tests 151Avg Mileage 108,258Top Failure Suspension — 51.0%

2019High Fail Rate

59.3%

Age (yrs) 20Tests 145Avg Mileage 101,787Top Failure Suspension — 52.4%

2020High Fail Rate

62.6%

Age (yrs) 21Tests 99Avg Mileage 103,193Top Failure Suspension — 41.4%

MOT results for 1999 Mercedes S 320 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	10	68.0%	902	95,590	Brakes — 16.0%
2010	11	67.7%	844	100,069	Lamps, Reflectors and Electrical Equipment — 17.3%
2011	12	63.7%	783	102,567	Lamps, Reflectors and Electrical Equipment — 19.2%
2012	13	64.5%	698	104,377	Suspension — 19.9%
2013	14	62.3%	616	106,808	Brakes — 49.7%
2014	15	62.8%	516	106,971	Suspension — 40.5%
2015	16	58.7%	492	111,593	Brakes — 51.8%
2016	17	60.2%	405	109,674	Brakes — 50.4%
2017	18	63.9%	269	107,291	Brakes — 52.4%
2018	19	62.9%	151	108,258	Suspension — 51.0%
2019	20	59.3%	145	101,787	Suspension — 52.4%
2020	21	62.6%	99	103,193	Suspension — 41.4%

Common MOT Failures

Top failure categories across all test years for 1999 Mercedes S 320, with age trends.

Suspension

36.2%

↑ Increases with age

Brakes

35.9%

↑ Increases with age

Lamps, reflectors and electrical equipment

29.1%

↑ Increases with age

Lamps, Reflectors and Electrical Equipment

26.4%

— Consistent

Body, chassis, structure

22.1%

↑ 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	11.4% (10 yrs)	41.4% (21 yrs)	+30.0%	🔴 ↑
Brakes	16.0% (10 yrs)	36.4% (21 yrs)	+20.4%	🔴 ↑
Tyres	13.1% (10 yrs)	30.3% (21 yrs)	+17.2%	🔴 ↑

Other Manufacture Years

Looking for the best year to buy? See the full comparison on the Mercedes S 320 page →

About This Data

This page shows how Mercedes S 320 cars manufactured in 1999 perform at MOT as they age. Data spans from 2009 to 2020, covering 5,920 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.