Is the 2014 MERCEDES GL reliable?

Excellent reliability. Very few MOT failures. 92% of MERCEDES GLs from 2014 passed their MOT first time in 2026, based on 1,321 tests. That's 10 points above the national average of 82%.

How much does a 2014 MERCEDES GL cost to run?

Estimated annual running cost is £1,895 (£158/month), including £1245 fuel, £395 road tax, £55 MOT, and £200 predicted repairs.

What is the MOT pass rate for a 2014 MERCEDES GL?

The 2014 MERCEDES GL has a 92% MOT pass rate based on 1,321 tests in 2026. This ranks 104 out of 562 cars from 2014.

Which year MERCEDES GL is most reliable?

The 2020 MERCEDES GL has the highest MOT pass rate at 100%. The least reliable year is 2006 at 78%.

What is the average mileage for a 2014 MERCEDES GL?

The average mileage for a 2014 MERCEDES GL is 93,766 miles, which is in line with the expected 88,800 miles for a 12-year-old car, suggesting normal everyday use.

MERCEDES GL (2014)

Running costs, reliability data, and common problems from 1,321 real MOT tests.

Annual Cost

£1,895

£158/month

MOT Pass Rate

92%

Excellent

Road Tax

£395

Based on CC/year

Insurance

Grp 30-42

2987cc Diesel

Great Choice

92% pass rate, £1895/year to run. 10 points above average.

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Diesel2987cc12 years old1,321 tests94k miles avg

Annual Running Costs

Fuel (Diesel, 2987cc)

~40 mpg

£1,245

Road Tax

Based on 2987cc

£395

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,895

Per month£158/mo

Per week£36/wk

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.

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Reliability Verdict

92% MOT pass rate(Excellent)

0%National avg: 82%100%

Excellent reliability. Very few MOT failures. That's 10 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.

At 12 years old, 92% of MERCEDES GLs from 2014 passed their MOT first time in 2026. That's based on 1,321 tests across the UK. The average mileage at this age is 93,766 miles.

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How Does It Compare?

Rank among 2014 cars104th of 562(top 19%)

Rank among MERCEDES models469th of 1,408(top 33%)

vs national average+10%(82% avg)

vs 2014 cars average+11%(81% avg)

vs MERCEDES average+5%(87% avg)

Mileage Analysis

93,766

Average miles

88,800

Expected for age

The average 2014 MERCEDES GL has 93,766 miles on the clock, which is in line with the expected 88,800 miles for a 12-year-old car, suggesting normal everyday use.

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Best Year to Buy?

The most reliable year is the 2020 model with a 100% MOT pass rate, while the 2006 model has the lowest at 78%. The 2014 sits between the two at 92%.

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

Similar Cars to Consider

LAND ROVER RANGE ROVER

2013 · 2926cc Diesel

£1,900/year

88%

-4%

JAGUAR XF

2014 · 2993cc Diesel

£1,900/year

84%

-8%

FORD RANGER

2016 · 3198cc Diesel

£1,900/year

84%

-8%

AUDI Q5

2016 · 2967cc Diesel

£1,750/year

90%

-2%

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About the 2014 MERCEDES GL

The 2014 MERCEDES GL is a large car with a 2987cc diesel engine. 1,321 of these vehicles were MOT tested in 2026, making it a reasonably common sight on UK roads. It ranks in the top 19% of all 2014 cars for reliability.

With an average of 93,766 miles at 12 years old, MERCEDES GL owners drive about as much as the UK average.

2014 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 2014 MERCEDES GL?

Total estimated annual running cost is £1,895 (£158/month), broken down as £1245 fuel, £395 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 92% 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 2014 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%.

Common Issues to Watch For

Based on the 2014 MERCEDES GL's fuel type, age, and engine size, these are the most likely problem areas to check.

DPF (Diesel Particulate Filter)

Watch out

Short journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.

Turbo Wear

Watch out

Diesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.

EGR Valve

Watch out

Exhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.

Dual Mass Flywheel

Watch out

Larger diesel engines put extra strain on the dual mass flywheel. Listen for rattling at idle. Replacement with clutch is £800-£1,500.

Rust and Corrosion

Watch out

At 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.

Suspension Bushings

Watch out

Rubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.

Clutch Wear

Medium risk

With an average of 94k miles, clutch replacement may be due (typical lifespan 60,000-100,000 miles). Budget £400-£800 for a new clutch kit.

Brake Discs and Pads

Medium risk

High-mileage cars often need brake disc replacement, not just pads. A full set of discs and pads costs £200-£500 per axle.

Service History

Low risk

Always request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.

Running Costs Compared

How the 2014 MERCEDES GL stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
MERCEDES GL(2014)	92%	£1245	£395	Grp 30-42	£1895
LAND ROVER RANGE ROVER(2013)	88%	£1245	£250	Grp 30-42	£1900+£5
JAGUAR XF(2014)	84%	£1245	£250	Grp 30-42	£1900+£5
FORD RANGER(2016)	84%	£1245	£250	Grp 35-50	£1900+£5
AUDI Q5(2016)	90%	£1245	£250	Grp 30-42	£1750-£145

Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.