MERCEDES GL (2020)
Running costs, common problems, and reliability data based on 69 real MOT tests in 2024.
MOT Pass Rate
100%
Total Tests (2024)
69
Avg Mileage
41,984 mi
Est. Annual Cost
£1,772
Is the 2020 MERCEDES GL reliable?
Excellent reliability. Very few MOT failures. That's 18 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 4 years old, 100% of MERCEDES GLs from 2020 passed their MOT first time in 2024. That's based on 69 tests across the UK. The average mileage at this age is 41,984 miles.
How does the 2020 MERCEDES GL compare?
Mileage Analysis
The average 2020 MERCEDES GL has 41,984 miles on the clock, which is above the expected 29,600 miles for a 4-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
How much does a 2020 MERCEDES GL cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
MERCEDES GL by Year
| 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 |
Checking a specific MERCEDES GL?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2020 MERCEDES GL
The 2020 MERCEDES GL is a family car with a 2000cc petrol engine. 69 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It ranks in the top 1% of all 2020 cars for reliability.
With an average of 41,984 miles at 4 years old, MERCEDES GL owners cover more miles than the average driver.
2020 MERCEDES GL Fuel Costs
The 2000cc petrol engine offers a reasonable balance between performance and economy. Expect around 36 mpg in mixed driving, which works out to roughly £1,327 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2020 MERCEDES GL?
Total estimated annual running cost is £1,772 (£148/month), broken down as £1327 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 100% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
MERCEDES GL Reliability Trend
Newer MERCEDES GLs show better MOT pass rates than older ones, with an average improvement of 9 percentage points.
Buying a Used 2020 MERCEDES GL
At 4 years old, the MERCEDES GL offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. Note: with only 69 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2020 MERCEDES GL
The MERCEDES GL is actually the most reliable option among similar petrol family cars from this era. Here are comparable petrol cars with similar engines:
- NISSAN QASHQAI (2020) 93% pass rate (-7%) from 52,321 tests
- HYUNDAI TUCSON (2019) 90% pass rate (-10%) from 42,920 tests
- MERCEDES A (2021) 94% pass rate (-6%) from 37,477 tests
- VOLVO XC40 (2020) 93% pass rate (-7%) from 36,064 tests