Mercedes GL 320 (2007)

Estimated running costs and MOT pass rates from 501 MOT tests in 2024.

Annual Cost

£2,641

£220/month

MOT Pass Rate

79%

Average

Road Tax

£410

Estimated/year

Est. Insurance

Grp 30-42

2987cc Diesel

Check Carefully

79% pass rate, £2,641/year to run. Close to the average across all models.

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Diesel2987cc19 years old501 tests131k miles avg

Annual Running Costs

Fuel (Diesel, 2987cc)

~40 mpg

£1,676

Road Tax

Estimated CO2 band

£410

MOT Test

£55

Predicted Repairs

£500

Total per year£2,641

Per month£220/mo

Per week£51/wk

Estimates based on 7,400 miles/year (UK average), diesel at 199.33p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included.

Reliability Verdict

79% MOT pass rate(Average)

0%All-model avg: 82%100%

Average reliability. Expect some repairs as it ages. That's close to the average of 82% across all models in our data. It falls below the Mercedes brand average of 87%.

79% of MOT tests on Mercedes GL 320s from 2007 ended in a pass in 2024, when they were about 17 years old. That's based on 501 tests across the UK, retests included. The average mileage recorded at those tests was 131,087 miles.

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How Does It Compare?

Rank among 2007 models213th of 574(top half)

Rank among Mercedes models1110th of 1,376(bottom 20%)

vs average of all models-3%(82% avg)

vs 2007 models average+6%(73% avg)

vs Mercedes average-8%(87% avg)

Mileage Analysis

131,087

Average miles

125,800

Expected for age

The average 2007 Mercedes GL 320 had 131,087 miles on the clock at its 2024 MOT, which is in line with the expected 125,800 miles for a 17-year-old car, suggesting normal everyday use.

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Mercedes GL 320 by Year

Year	Pass Rate	Tests	Avg Mileage
2009	75%	161	125,291 mi
2008	77%	126	132,206 mi
2007	79%	501	131,087 mi
2006	90%	77	129,501 mi

Similar Cars to Consider

BMW 3 Series

2008 · 2926cc Diesel

£2,491/year

80%

+1%

Land Rover Discovery

2006 · 2495cc Diesel

£2,641/year

78%

-1%

Audi TT

2008 · 3189cc Diesel

£2,841/year

81%

+2%

Jaguar XF

2009 · 2993cc Diesel

£2,641/year

77%

-2%

Check a Specific Mercedes GL 320

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About the 2007 Mercedes GL 320

The 2007 Mercedes GL 320 is a premium performance car. Our records list a 2987cc diesel engine, though engines vary between versions. 501 MOT tests were recorded on this model in 2024, making it a less common model in the UK market. Among all models from 2007, the average MOT pass rate is 73%, and this model beats that benchmark.

With an average of 131,087 miles recorded at its 2024 MOT tests, Mercedes GL 320 owners drive about as much as the UK average.

2007 Mercedes GL 320 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 £1,676 per year with diesel at 199.33p per litre (GOV.UK weekly average, week of 19 October 2026; 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 2007 Mercedes GL 320?

Total estimated annual running cost is £2,641 (£220/month), broken down as £1,676 fuel, £410 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 79% pass rate. Keeping on top of servicing will help avoid surprises.

Mercedes GL 320 Reliability Trend

The Mercedes GL 320 has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.

Buying a Used 2007 Mercedes GL 320

At 19 years old, the Mercedes GL 320 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.

Common Issues to Watch For

These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.

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

Watch out

With an average of 131k 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.

Engine Mounts

Medium risk

Worn engine mounts cause excessive vibration and movement. Replacement costs £150-£400 per mount. Check for vibration at idle with the bonnet open.

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 2007 Mercedes GL 320 stacks up against similar cars for estimated annual running costs, insurance group, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Est. Ins. Group	Total/yr
Mercedes GL 320(2007)	79%	£1,676	£410	Grp 30-42	£2,641
BMW 3 Series(2008)	80%	£1,676	£410	Grp 30-42	£2,491-£150
Land Rover Discovery(2006)	78%	£1,676	£410	Grp 25-38	£2,641same
Audi TT(2008)	81%	£1,676	£760	Grp 35-50	£2,841+£200
Jaguar XF(2009)	77%	£1,676	£410	Grp 30-42	£2,641same

Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.

Questions about the 2007 Mercedes GL 320

Is the 2007 Mercedes GL 320 reliable?

Average reliability. Expect some repairs as it ages. 79% of MOT tests on 2007 Mercedes GL 320s ended in a pass, from 501 tests (DVSA MOT data for tests in 2024, retests included). That's 3 points below the average of 82% across all models in the same data.

How much does a 2007 Mercedes GL 320 cost to run?

Our estimate is £2,641 a year (£220 a month): £1,676 fuel, £410 road tax, £55 MOT and £500 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2007 Mercedes GL 320?

79% of 501 MOT tests on the 2007 Mercedes GL 320 ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 213th of 574 models first registered in 2007 (top half).

Which year Mercedes GL 320 has the best MOT pass rate?

Of the years with at least 100 tests, the 2007 Mercedes GL 320 has the highest MOT pass rate at 79% and the 2009 the lowest at 75%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2007 Mercedes GL 320?

The average mileage recorded at MOT tests on the 2007 Mercedes GL 320 is 131,087 miles, which is in line with the expected 125,800 miles for a 17-year-old car, suggesting normal everyday use.