Is the Mercedes Gl reliable?

The Mercedes Gl has an average MOT pass rate of 89% across 16 years, based on 7,366 tests in 2026. That's 7 points above the national average of 82%. The most reliable year is 2020 with a 100% pass rate.

Which year Mercedes Gl is best?

The 2020 Mercedes Gl has the highest MOT pass rate at 100%, while the 2006 model has the lowest at 78%. There's a 22 percentage point spread between the best and worst years.

Mercedes Gl

Reliability, running costs, and MOT data across 16 years from 7,366 real MOT tests.

Avg Pass Rate

89%

Total Tests

7,366

Best Year

2020 (100%)

Years Covered

About the Mercedes Gl

The Mercedes Gl has been tested 7,366 times in 2026 MOT data across 16 model years (2006 to 2021), with an average pass rate of 89%. That's comfortably above the national average of 82%, making it a reliable choice. Available as diesel and petrol.

Best and Worst Years

The 2020 model is the most reliable with a 100% pass rate from 69 tests. The 2006 model has the lowest at 78%. With a 22 point spread, choosing the right year makes a big difference to reliability.

Reliability Trend

Newer MERCEDES GLs show better MOT pass rates than older ones, with an average improvement of 9 percentage points.

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)

£1,137

Road Tax

£195

MOT Test

£55

Predicted Repairs

£200

Total per year£1,587

Per month£132/mo

Based on 7,400 miles/year, current fuel prices, and MOT pass rate data. Insurance not included.

Full 2021 details

How reliable is the Mercedes Gl?

vs national average+7% (82% avg)

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

Best to worst year spread22 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