2008 Mercedes Gl 420 — MOT History by Age

How cars manufactured in 2008 perform at MOT as they age

18 years

Current Age

70.0%

Latest Pass Rate

1,823

Total Tests (All Years)

113,029 mi

Avg Mileage (Latest)

Data from official DVSA MOT testing records

Compared to Average at Age 12

This car: 70.0%

Average: 54.3%

✅ 15.7% above average (13966 models compared)

How This Car Ages

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

3 yrs82.1%

→ ↑3.5%

4 yrs85.6%

→ ↓9.9%

5 yrs75.7%

→ ↑0.9%

6 yrs76.6%

→ ↑4.0%

7 yrs80.6%

→ ↓2.7%

8 yrs77.9%

→ ↓3.6%

9 yrs74.3%

→ ↑0.5%

10 yrs74.8%

→ ↓0.2%

11 yrs74.6%

→ ↓4.6%

12 yrs70.0%

📊 View as table

Age	Pass Rate	Tests
3 yrs	82.1%	224
4 yrs	85.6%	209
5 yrs	75.7%	214
6 yrs	76.6%	205
7 yrs	80.6%	211
8 yrs	77.9%	190
9 yrs	74.3%	191
10 yrs	74.8%	131
11 yrs	74.6%	138
12 yrs	70.0%	110

Pass Rate Trend

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

📊 View as table

Built	Pass Rate	Tests
2020 (12 yrs)	70%	110
2019 (11 yrs)	74.6%	138
2018 (10 yrs)	74.8%	131
2017 (9 yrs)	74.3%	191
2016 (8 yrs)	77.9%	190
2015 (7 yrs)	80.6%	211
2014 (6 yrs)	76.6%	205
2013 (5 yrs)	75.7%	214
2012 (4 yrs)	85.6%	209
2011 (3 yrs)	82.1%	224

Year-by-Year MOT Results

2011

82.1%

Age (yrs) 3Tests 224Avg Mileage 34,153Top Failure Lamps, Reflectors and Electrical Equipment — 8.5%

2012

85.6%

Age (yrs) 4Tests 209Avg Mileage 43,961Top Failure Lamps, Reflectors and Electrical Equipment — 7.7%

2013

75.7%

Age (yrs) 5Tests 214Avg Mileage 53,665Top Failure Tyres — 25.7%

2014

76.6%

Age (yrs) 6Tests 205Avg Mileage 64,206Top Failure Brakes — 25.4%

2015

80.6%

Age (yrs) 7Tests 211Avg Mileage 76,616Top Failure Brakes — 27.0%

2016

77.9%

Age (yrs) 8Tests 190Avg Mileage 80,545Top Failure Brakes — 25.8%

2017

74.3%

Age (yrs) 9Tests 191Avg Mileage 90,977Top Failure Brakes — 23.0%

2018

74.8%

Age (yrs) 10Tests 131Avg Mileage 101,398Top Failure Brakes — 33.6%

2019

74.6%

Age (yrs) 11Tests 138Avg Mileage 106,630Top Failure Brakes — 34.8%

2020

70.0%

Age (yrs) 12Tests 110Avg Mileage 113,029Top Failure Brakes — 35.5%

MOT results for 2008 Mercedes Gl 420 by test year
Test Year▲	Age (yrs)▲▼	Pass Rate▲▼	Tests▲▼	Avg Mileage▲▼	Top Failure▲▼
2011	3	82.1%	224	34,153	Lamps, Reflectors and Electrical Equipment — 8.5%
2012	4	85.6%	209	43,961	Lamps, Reflectors and Electrical Equipment — 7.7%
2013	5	75.7%	214	53,665	Tyres — 25.7%
2014	6	76.6%	205	64,206	Brakes — 25.4%
2015	7	80.6%	211	76,616	Brakes — 27.0%
2016	8	77.9%	190	80,545	Brakes — 25.8%
2017	9	74.3%	191	90,977	Brakes — 23.0%
2018	10	74.8%	131	101,398	Brakes — 33.6%
2019	11	74.6%	138	106,630	Brakes — 34.8%
2020	12	70.0%	110	113,029	Brakes — 35.5%

Common MOT Failures

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

Brakes

22.4%

↑ Increases with age

Lamps, reflectors and electrical equipment

13.8%

↑ Increases with age

Tyres

13.6%

↑ Increases with age

Lamps, Reflectors and Electrical Equipment

12.0%

↓ Decreases with age

Suspension

9.5%

↑ 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	3.6% (3 yrs)	35.5% (12 yrs)	+31.9%	🔴 ↑
Tyres	5.8% (3 yrs)	18.2% (12 yrs)	+12.4%	🔴 ↑
Suspension	4.9% (3 yrs)	10.9% (12 yrs)	+6.0%	🔴 ↑

Other Manufacture Years

2006 2007 2008

← Back to Mercedes Gl 420 overview

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

About This Data

This page shows how Mercedes Gl 420 cars manufactured in 2008 perform at MOT as they age. Data spans from 2011 to 2020, covering 1,823 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.