2008 Mercedes Ml 420 — MOT History by Age

How cars manufactured in 2008 perform at MOT as they age

18 years

Current Age

69.0%

Latest Pass Rate

1,642

Total Tests (All Years)

112,977 mi

Avg Mileage (Latest)

Data from official DVSA MOT testing records

Compared to Average at Age 12

This car: 69.0%

Average: 54.3%

✅ 14.7% above average (13966 models compared)

How This Car Ages

Pass rate progression for the 2008 Mercedes Ml 420 as it ages.

3 yrs84.5%

→ ↓0.5%

4 yrs84.0%

→ ↓2.7%

5 yrs81.3%

→ ↓6.7%

6 yrs74.6%

→ ↑5.8%

7 yrs80.4%

→ ↓10.1%

8 yrs70.3%

→ ↑5.9%

9 yrs76.2%

→ ↓2.3%

10 yrs73.9%

→ ↑2.6%

11 yrs76.5%

→ ↓7.5%

12 yrs69.0%

📊 View as table

Age	Pass Rate	Tests
3 yrs	84.5%	193
4 yrs	84.0%	188
5 yrs	81.3%	187
6 yrs	74.6%	185
7 yrs	80.4%	179
8 yrs	70.3%	182
9 yrs	76.2%	172
10 yrs	73.9%	115
11 yrs	76.5%	115
12 yrs	69.0%	126

Pass Rate Trend

How the 2008 Mercedes Ml 420 pass rate changes as it ages, from first MOT to most recent.

📊 View as table

Built	Pass Rate	Tests
2020 (12 yrs)	69%	126
2019 (11 yrs)	76.5%	115
2018 (10 yrs)	73.9%	115
2017 (9 yrs)	76.2%	172
2016 (8 yrs)	70.3%	182
2015 (7 yrs)	80.4%	179
2014 (6 yrs)	74.6%	185
2013 (5 yrs)	81.3%	187
2012 (4 yrs)	84%	188
2011 (3 yrs)	84.5%	193

Year-by-Year MOT Results

2011

84.5%

Age (yrs) 3Tests 193Avg Mileage 36,481Top Failure Lamps, Reflectors and Electrical Equipment — 6.2%

2012

84.0%

Age (yrs) 4Tests 188Avg Mileage 49,756Top Failure Tyres — 6.9%

2013

81.3%

Age (yrs) 5Tests 187Avg Mileage 55,573Top Failure Tyres — 15.5%

2014

74.6%

Age (yrs) 6Tests 185Avg Mileage 66,084Top Failure Brakes — 22.7%

2015

80.4%

Age (yrs) 7Tests 179Avg Mileage 78,789Top Failure Brakes — 15.1%

2016

70.3%

Age (yrs) 8Tests 182Avg Mileage 86,689Top Failure Brakes — 36.3%

2017

76.2%

Age (yrs) 9Tests 172Avg Mileage 92,302Top Failure Brakes — 27.3%

2018

73.9%

Age (yrs) 10Tests 115Avg Mileage 100,709Top Failure Brakes — 20.9%

2019

76.5%

Age (yrs) 11Tests 115Avg Mileage 110,181Top Failure Brakes — 50.4%

2020

69.0%

Age (yrs) 12Tests 126Avg Mileage 112,977Top Failure Brakes — 57.9%

MOT results for 2008 Mercedes Ml 420 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2011	3	84.5%	193	36,481	Lamps, Reflectors and Electrical Equipment — 6.2%
2012	4	84.0%	188	49,756	Tyres — 6.9%
2013	5	81.3%	187	55,573	Tyres — 15.5%
2014	6	74.6%	185	66,084	Brakes — 22.7%
2015	7	80.4%	179	78,789	Brakes — 15.1%
2016	8	70.3%	182	86,689	Brakes — 36.3%
2017	9	76.2%	172	92,302	Brakes — 27.3%
2018	10	73.9%	115	100,709	Brakes — 20.9%
2019	11	76.5%	115	110,181	Brakes — 50.4%
2020	12	69.0%	126	112,977	Brakes — 57.9%

Common MOT Failures

Top failure categories across all test years for 2008 Mercedes Ml 420, with age trends.

Brakes

25.2%

↑ Increases with age

Lamps, reflectors and electrical equipment

17.5%

↑ Increases with age

Lamps, Reflectors and Electrical Equipment

12.0%

— Consistent

Tyres

11.8%

↑ Increases with age

Suspension

8.8%

↑ 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	4.1% (3 yrs)	57.9% (12 yrs)	+53.8%	🔴 ↑
Tyres	5.7% (3 yrs)	18.3% (12 yrs)	+12.6%	🔴 ↑
Suspension	3.6% (3 yrs)	15.1% (12 yrs)	+11.5%	🔴 ↑

Other Manufacture Years

2006 2007 2008

← Back to Mercedes Ml 420 overview

Looking for the best year to buy? See the full comparison on the Mercedes Ml 420 page →

About This Data

This page shows how Mercedes Ml 420 cars manufactured in 2008 perform at MOT as they age. Data spans from 2011 to 2020, covering 1,642 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.