1984 Mercedes 300 — MOT History by Age

How cars manufactured in 1984 perform at MOT as they age

42 years

Current Age

45.5%

Latest Pass Rate

363

Total Tests (All Years)

150,725 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 1984 Mercedes 300 as it ages.

25 yrs52.2%

→ ↑7.4%

26 yrs59.6%

→ ↑5.0%

27 yrs64.6%

→ ↓25.1%

28 yrs39.5%

→ ↑24.9%

29 yrs64.4%

→ ↓3.9%

30 yrs60.5%

→ ↓3.4%

31 yrs57.1%

→ ↓11.6%

32 yrs45.5%

📊 View as table

Age	Pass Rate	Tests
25 yrs	52.2%	69
26 yrs	59.6%	52
27 yrs	64.6%	48
28 yrs	39.5%	43
29 yrs	64.4%	45
30 yrs	60.5%	38
31 yrs	57.1%	35
32 yrs	45.5%	33

Pass Rate Trend

How the 1984 Mercedes 300 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2016 (32 yrs)	45.5%	33
2015 (31 yrs)	57.1%	35
2014 (30 yrs)	60.5%	38
2013 (29 yrs)	64.4%	45
2012 (28 yrs)	39.5%	43
2011 (27 yrs)	64.6%	48
2010 (26 yrs)	59.6%	52
2009 (25 yrs)	52.2%	69

Year-by-Year MOT Results

2009High Fail Rate

52.2%

Age (yrs) 25Tests 69Avg Mileage 154,115Top Failure Suspension — 29.0%

2010High Fail Rate

59.6%

Age (yrs) 26Tests 52Avg Mileage 146,218Top Failure Suspension — 21.2%

2011High Fail Rate

64.6%

Age (yrs) 27Tests 48Avg Mileage 151,533Top Failure Suspension — 20.8%

2012High Fail Rate

39.5%

Age (yrs) 28Tests 43Avg Mileage 148,285Top Failure Suspension — 44.2%

2013High Fail Rate

64.4%

Age (yrs) 29Tests 45Avg Mileage 149,080Top Failure Suspension — 55.6%

2014High Fail Rate

60.5%

Age (yrs) 30Tests 38Avg Mileage 153,029Top Failure Lamps, Reflectors and Electrical Equipment — 81.6%

2015High Fail Rate

57.1%

Age (yrs) 31Tests 35Avg Mileage 157,653Top Failure Suspension — 80.0%

2016High Fail Rate

45.5%

Age (yrs) 32Tests 33Avg Mileage 150,725Top Failure Brakes — 127.3%

MOT results for 1984 Mercedes 300 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	25	52.2%	69	154,115	Suspension — 29.0%
2010	26	59.6%	52	146,218	Suspension — 21.2%
2011	27	64.6%	48	151,533	Suspension — 20.8%
2012	28	39.5%	43	148,285	Suspension — 44.2%
2013	29	64.4%	45	149,080	Suspension — 55.6%
2014	30	60.5%	38	153,029	Lamps, Reflectors and Electrical Equipment — 81.6%
2015	31	57.1%	35	157,653	Suspension — 80.0%
2016	32	45.5%	33	150,725	Brakes — 127.3%

Common MOT Failures

Top failure categories across all test years for 1984 Mercedes 300, with age trends.

Suspension

54.6%

↑ Increases with age

Brakes

41.3%

↑ Increases with age

Lamps, Reflectors and Electrical Equipment

40.5%

↑ Increases with age

Tyres

28.3%

↑ Increases with age

Steering

23.8%

↑ 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	24.6% (25 yrs)	127.3% (32 yrs)	+102.7%	🔴 ↑
Suspension	29.0% (25 yrs)	112.1% (32 yrs)	+83.1%	🔴 ↑
Lamps, Reflectors and Electrical Equipment	27.5% (25 yrs)	72.7% (32 yrs)	+45.2%	🔴 ↑

Other Manufacture Years

1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1998 1999

← Back to Mercedes 300 overview

Looking for the best year to buy? See the full comparison on the Mercedes 300 page →

About This Data

This page shows how Mercedes 300 cars manufactured in 1984 perform at MOT as they age. Data spans from 2009 to 2016, covering 363 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.