1999 Mercedes 300 — MOT History by Age

How cars manufactured in 1999 perform at MOT as they age

27 years

Current Age

41.9%

Latest Pass Rate

313

Total Tests (All Years)

135,783 mi

Avg Mileage (Latest)

Data from official DVSA MOT testing records

Compared to Average at Age 16

This car: 41.9%

Average: 52.7%

⚠️ 10.8% below average (10212 models compared)

How This Car Ages

Pass rate progression for the 1999 Mercedes 300 as it ages.

10 yrs55.2%

→ ↓0.5%

11 yrs54.7%

→ ↓2.8%

12 yrs51.9%

→ ↓0.7%

13 yrs51.2%

→ ↓0.0%

14 yrs51.2%

→ ↑3.1%

15 yrs54.3%

→ ↓12.4%

16 yrs41.9%

📊 View as table

Age	Pass Rate	Tests
10 yrs	55.2%	58
11 yrs	54.7%	53
12 yrs	51.9%	52
13 yrs	51.2%	43
14 yrs	51.2%	41
15 yrs	54.3%	35
16 yrs	41.9%	31

Pass Rate Trend

How the 1999 Mercedes 300 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2015 (16 yrs)	41.9%	31
2014 (15 yrs)	54.3%	35
2013 (14 yrs)	51.2%	41
2012 (13 yrs)	51.2%	43
2011 (12 yrs)	51.9%	52
2010 (11 yrs)	54.7%	53
2009 (10 yrs)	55.2%	58

Year-by-Year MOT Results

2009High Fail Rate

55.2%

Age (yrs) 10Tests 58Avg Mileage 125,312Top Failure Brakes — 25.9%

2010High Fail Rate

54.7%

Age (yrs) 11Tests 53Avg Mileage 132,317Top Failure Lamps, Reflectors and Electrical Equipment — 32.1%

2011High Fail Rate

51.9%

Age (yrs) 12Tests 52Avg Mileage 143,991Top Failure Lamps, Reflectors and Electrical Equipment — 23.1%

2012High Fail Rate

51.2%

Age (yrs) 13Tests 43Avg Mileage 141,376Top Failure Suspension — 23.3%

2013High Fail Rate

51.2%

Age (yrs) 14Tests 41Avg Mileage 150,189Top Failure Suspension — 68.3%

2014High Fail Rate

54.3%

Age (yrs) 15Tests 35Avg Mileage 144,311Top Failure Brakes — 82.9%

2015High Fail Rate

41.9%

Age (yrs) 16Tests 31Avg Mileage 135,783Top Failure Lamps, Reflectors and Electrical Equipment — 109.7%

MOT results for 1999 Mercedes 300 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2009	10	55.2%	58	125,312	Brakes — 25.9%
2010	11	54.7%	53	132,317	Lamps, Reflectors and Electrical Equipment — 32.1%
2011	12	51.9%	52	143,991	Lamps, Reflectors and Electrical Equipment — 23.1%
2012	13	51.2%	43	141,376	Suspension — 23.3%
2013	14	51.2%	41	150,189	Suspension — 68.3%
2014	15	54.3%	35	144,311	Brakes — 82.9%
2015	16	41.9%	31	135,783	Lamps, Reflectors and Electrical Equipment — 109.7%

Common MOT Failures

Top failure categories across all test years for 1999 Mercedes 300, with age trends.

Brakes

43.8%

↑ Increases with age

Lamps, Reflectors and Electrical Equipment

40.5%

↑ Increases with age

Suspension

38.2%

↑ Increases with age

Tyres

28.1%

↑ Increases with age

Exhaust, Fuel and Emissions

21.2%

— Consistent

How Failures Change With Age

Comparing failure rates between the youngest and oldest test years.

Category	At Youngest	At Oldest	Change	Trend
Lamps, Reflectors and Electrical Equipment	12.1% (10 yrs)	109.7% (16 yrs)	+97.6%	🔴 ↑
Brakes	25.9% (10 yrs)	64.5% (16 yrs)	+38.6%	🔴 ↑
Suspension	24.1% (10 yrs)	51.6% (16 yrs)	+27.5%	🔴 ↑
Tyres	19.0% (10 yrs)	41.9% (16 yrs)	+22.9%	🔴 ↑
Driver's View of the Road	13.8% (10 yrs)	32.3% (16 yrs)	+18.5%	🔴 ↑

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 1999 perform at MOT as they age. Data spans from 2009 to 2015, covering 313 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.