1991 Mercedes 300 G Wagon — MOT History by Age

How cars manufactured in 1991 perform at MOT as they age

35 years

Current Age

54.9%

Latest Pass Rate

876

Total Tests (All Years)

142,942 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 1991 Mercedes 300 G Wagon as it ages.

18 yrs56.0%

→ ↑8.5%

19 yrs64.5%

→ ↓11.4%

20 yrs53.1%

→ ↑1.9%

21 yrs55.0%

→ ↑1.3%

22 yrs56.3%

→ ↓0.0%

23 yrs56.3%

→ ↓3.1%

24 yrs53.2%

→ ↑16.4%

25 yrs69.6%

→ ↓8.6%

26 yrs61.0%

→ ↑2.8%

27 yrs63.8%

→ ↓6.1%

28 yrs57.7%

→ ↓2.8%

29 yrs54.9%

📊 View as table

Age	Pass Rate	Tests
18 yrs	56.0%	91
19 yrs	64.5%	76
20 yrs	53.1%	81
21 yrs	55.0%	80
22 yrs	56.3%	80
23 yrs	56.3%	80
24 yrs	53.2%	77
25 yrs	69.6%	79
26 yrs	61.0%	82
27 yrs	63.8%	47
28 yrs	57.7%	52
29 yrs	54.9%	51

Pass Rate Trend

How the 1991 Mercedes 300 G Wagon pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2020 (29 yrs)	54.9%	51
2019 (28 yrs)	57.7%	52
2018 (27 yrs)	63.8%	47
2017 (26 yrs)	61%	82
2016 (25 yrs)	69.6%	79
2015 (24 yrs)	53.2%	77
2014 (23 yrs)	56.3%	80
2013 (22 yrs)	56.3%	80
2012 (21 yrs)	55%	80
2011 (20 yrs)	53.1%	81
2010 (19 yrs)	64.5%	76
2009 (18 yrs)	56%	91

Year-by-Year MOT Results

2009High Fail Rate

56.0%

Age (yrs) 18Tests 91Avg Mileage 117,632Top Failure Brakes — 30.8%

2010High Fail Rate

64.5%

Age (yrs) 19Tests 76Avg Mileage 120,766Top Failure Lamps, Reflectors and Electrical Equipment — 22.4%

2011High Fail Rate

53.1%

Age (yrs) 20Tests 81Avg Mileage 127,208Top Failure Lamps, Reflectors and Electrical Equipment — 24.7%

2012High Fail Rate

55.0%

Age (yrs) 21Tests 80Avg Mileage 126,003Top Failure Brakes — 26.3%

2013High Fail Rate

56.3%

Age (yrs) 22Tests 80Avg Mileage 125,778Top Failure Brakes — 88.8%

2014High Fail Rate

56.3%

Age (yrs) 23Tests 80Avg Mileage 130,880Top Failure Brakes — 77.5%

2015High Fail Rate

53.2%

Age (yrs) 24Tests 77Avg Mileage 134,252Top Failure Brakes — 64.9%

2016

69.6%

Age (yrs) 25Tests 79Avg Mileage 130,229Top Failure Suspension — 41.8%

2017High Fail Rate

61.0%

Age (yrs) 26Tests 82Avg Mileage 133,682Top Failure Brakes — 57.3%

2018High Fail Rate

63.8%

Age (yrs) 27Tests 47Avg Mileage 137,437Top Failure Brakes — 63.8%

2019High Fail Rate

57.7%

Age (yrs) 28Tests 52Avg Mileage 134,191Top Failure Brakes — 55.8%

2020High Fail Rate

54.9%

Age (yrs) 29Tests 51Avg Mileage 142,942Top Failure Suspension — 43.1%

MOT results for 1991 Mercedes 300 G Wagon by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	18	56.0%	91	117,632	Brakes — 30.8%
2010	19	64.5%	76	120,766	Lamps, Reflectors and Electrical Equipment — 22.4%
2011	20	53.1%	81	127,208	Lamps, Reflectors and Electrical Equipment — 24.7%
2012	21	55.0%	80	126,003	Brakes — 26.3%
2013	22	56.3%	80	125,778	Brakes — 88.8%
2014	23	56.3%	80	130,880	Brakes — 77.5%
2015	24	53.2%	77	134,252	Brakes — 64.9%
2016	25	69.6%	79	130,229	Suspension — 41.8%
2017	26	61.0%	82	133,682	Brakes — 57.3%
2018	27	63.8%	47	137,437	Brakes — 63.8%
2019	28	57.7%	52	134,191	Brakes — 55.8%
2020	29	54.9%	51	142,942	Suspension — 43.1%

Common MOT Failures

Top failure categories across all test years for 1991 Mercedes 300 G Wagon, with age trends.

Brakes

47.6%

↓ Decreases with age

Suspension

36.5%

↑ Increases with age

Lamps, reflectors and electrical equipment

36.2%

↑ Increases with age

Lamps, Reflectors and Electrical Equipment

33.4%

↑ Increases with age

Steering

23.3%

↑ 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	14.3% (18 yrs)	43.1% (29 yrs)	+28.8%	🔴 ↑
Brakes	30.8% (18 yrs)	27.5% (29 yrs)	-3.3%	🟢 ↓

Other Manufacture Years

1988 1989 1991 1992 1993

← Back to Mercedes 300 G Wagon overview

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About This Data

This page shows how Mercedes 300 G Wagon cars manufactured in 1991 perform at MOT as they age. Data spans from 2009 to 2020, covering 876 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.