MERCEDES GL (2012)
Running costs, common problems, and reliability data based on 225 real MOT tests in 2024.
MOT Pass Rate
89%
Total Tests (2024)
225
Avg Mileage
99,410 mi
Est. Annual Cost
£1,900
Is the 2012 MERCEDES GL reliable?
Good reliability. Occasional issues but generally solid. That's 7 points above the national average of 82%.
At 12 years old, 89% of MERCEDES GLs from 2012 passed their MOT first time in 2024. That's based on 225 tests across the UK. The average mileage at this age is 99,410 miles.
How does the 2012 MERCEDES GL compare?
Mileage Analysis
The average 2012 MERCEDES GL has 99,410 miles on the clock, which is in line with the expected 88,800 miles for a 12-year-old car, suggesting normal everyday use.
Best year to buy a MERCEDES GL?
The most reliable year is the 2020 model with a 100% MOT pass rate, while the 2006 model has the lowest at 78%. The 2012 sits between the two at 89%.
How much does a 2012 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 2012 MERCEDES GL
The 2012 MERCEDES GL is a large car with a 2987cc diesel engine. 225 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. It ranks in the top 22% of all 2012 cars for reliability.
With an average of 99,410 miles at 12 years old, MERCEDES GL owners drive about as much as the UK average.
2012 MERCEDES GL Fuel Costs
The 2987cc diesel engine is on the larger side, so fuel won't be this car's strong point. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 per year at current diesel prices of 148p per litre (based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.
What does it cost to own a 2012 MERCEDES GL?
Total estimated annual running cost is £1,900 (£158/month), broken down as £1245 fuel, £250 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 89% pass rate. Keeping on top of servicing will help avoid surprises.
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 2012 MERCEDES GL
At 12 years old, the MERCEDES GL is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. If you're flexible on year, the 2020 model has the highest pass rate at 100%.
Alternatives to the 2012 MERCEDES GL
The MERCEDES GL is actually the most reliable option among similar diesel large cars from this era. Here are comparable diesel cars with similar engines:
- LAND ROVER RANGE ROVER (2013) 88% pass rate (-1%) from 27,426 tests
- AUDI A4 (2011) 82% pass rate (-7%) from 26,901 tests
- JAGUAR XF (2014) 84% pass rate (-5%) from 26,866 tests
- AUDI A5 (2013) 85% pass rate (-4%) from 23,409 tests