Mercedes GL

Reliability, estimated running costs, and MOT data across 16 model years from 7,366 MOT tests in 2024.

Avg Pass Rate

89%

Total Tests

7,366

Highest Pass Rate

2019 (93%)

Years Covered

About the Mercedes GL

The Mercedes GL was MOT tested 7,366 times in 2024 (DVSA data, retests included) across 16 model years (2006 to 2021), with an average pass rate of 89%. That's comfortably above the average of 82% across all models in our data. Our records list diesel and petrol versions.

Best and Worst Years

Of the years with at least 100 tests, the 2019 model has the highest pass rate at 93% from 137 tests. The 2006 model has the lowest at 78%. The 15 point gap means pass rates vary somewhat between years, but no year is dramatically different. Newer cars usually pass more often simply because they are younger.

Reliability Trend

Newer Mercedes GLs pass their MOT more often than older ones, by 6 percentage points on average, which is mostly down to age and wear.

Mileage Across Years

The oldest model in our data (2006) averages 123,042 miles, while the newest (2021) averages 29,185 miles. Older models have covered serious mileage, so suspension and drivetrain wear are worth checking.

Estimated Running Costs

Fuel (Petrol, 1300cc)

£1,398

Road Tax

£200

MOT Test

£55

Predicted Repairs

£200

Total per year£1,853

Per month£154/mo

Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.

Full 2021 details

How reliable is the Mercedes GL?

vs average of all models+7% (82% avg)

vs Mercedes brand average+2% (87% avg)

Best to worst year spread15 percentage points

Reliability trendImproving over years

Mercedes GL by Year

Click any year to see detailed running costs, reliability data, and comparisons with similar cars.

Year	Pass Rate	Tests	Avg Mileage
2021	99%	71	29,185 mi
2020	100%	69	41,984 mi
2019	93%	137	35,018 mi
2018	95%	63	38,524 mi
2017	79%	47	108,751 mi
2016	88%	475	73,156 mi
2015	89%	1,283	79,394 mi
2014	92%	1,321	93,766 mi
2013	90%	1,304	103,757 mi
2012	89%	225	99,410 mi
2011	86%	609	116,582 mi
2010	89%	435	121,550 mi
2009	81%	224	126,000 mi
2008	84%	371	122,229 mi
2007	85%	572	130,779 mi
2006	78%	160	123,042 mi

Questions about the Mercedes GL

Is the Mercedes GL reliable?

Across its 16 model years in our data (2006 to 2021), the Mercedes GL averages an 89% MOT pass rate, from 7,366 tests (DVSA MOT data for tests in 2024, retests included). That's 7 points above the average of 82% across all models in the same data. The 2019 model has the highest pass rate of the years with at least 100 tests, at 93%.

Which year Mercedes GL has the best MOT pass rate?

Of the years with at least 100 tests, the 2019 Mercedes GL has the highest MOT pass rate at 93%, while the 2006 model has the lowest at 78%, a 15 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.