Mercedes 250 (2009)

Estimated running costs and MOT pass rates from 59 MOT tests in 2024.

Annual Cost

£2,341

£195/month

MOT Pass Rate

90%

Excellent

Road Tax

£410

Estimated/year

Est. Insurance

Grp 25-38

2497cc Diesel

Great Choice

90% pass rate, £2,341/year to run. 8 points above average.

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Diesel2497cc17 years old59 tests122k miles avg

Annual Running Costs

Fuel (Diesel, 2497cc)

~40 mpg

£1,676

Road Tax

Estimated CO2 band

£410

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£2,341

Per month£195/mo

Per week£45/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

90% MOT pass rate(Excellent)

0%All-model avg: 82%100%

Excellent reliability. Very few MOT failures. That's 8 points above the average of 82% across all models in our data.

90% of MOT tests on Mercedes 250s from 2009 ended in a pass in 2024, when they were about 15 years old. That's based on 59 tests across the UK, retests included. The average mileage recorded at those tests was 121,819 miles.

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How Does It Compare?

Rank among 2009 models61st of 555(top 11%)

Rank among Mercedes models657th of 1,376(top half)

vs average of all models+8%(82% avg)

vs 2009 models average+16%(74% avg)

vs Mercedes average+3%(87% avg)

Mileage Analysis

121,819

Average miles

111,000

Expected for age

The average 2009 Mercedes 250 had 121,819 miles on the clock at its 2024 MOT, which is in line with the expected 111,000 miles for a 15-year-old car, suggesting normal everyday use.

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Mercedes 250 by Year

Year	Pass Rate	Tests	Avg Mileage
2016	83%	53	75,772 mi
2015	87%	63	75,327 mi
2014	87%	63	83,572 mi
2013	85%	78	85,457 mi
2012	78%	208	99,156 mi
2011	80%	51	108,151 mi
2010	77%	57	101,457 mi
2009	90%	59	121,819 mi
1991	79%	39	147,016 mi
1990	76%	51	161,374 mi

Similar Cars to Consider

BMW 3 Series

2011 · 2000cc Diesel

£2,077/year

81%

-9%

Honda Civic

2007 · 2204cc Diesel

£2,641/year

72%

-18%

Ford Mondeo

2010 · 1999cc Diesel

£2,227/year

75%

-15%

Audi A4

2011 · 2967cc Diesel

£2,491/year

82%

-8%

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About the 2009 Mercedes 250

The 2009 Mercedes 250 is a premium car. Our records list a 2497cc diesel engine, though engines vary between versions. 59 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It ranks in the top 11% of all 2009 models for MOT pass rate.

With an average of 121,819 miles recorded at its 2024 MOT tests, Mercedes 250 owners drive about as much as the UK average.

2009 Mercedes 250 Fuel Costs

The 2497cc diesel engine offers a reasonable balance between performance and economy. 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 2009 Mercedes 250?

Total estimated annual running cost is £2,341 (£195/month), broken down as £1,676 fuel, £410 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 90% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Buying a Used 2009 Mercedes 250

At 17 years old, the Mercedes 250 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. Note: with only 59 tests in our data, these figures should be treated as indicative rather than definitive.

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 122k 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 2009 Mercedes 250 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 250(2009)	90%	£1,676	£410	Grp 25-38	£2,341
BMW 3 Series(2011)	81%	£1,397	£275	Grp 18-32	£2,077-£264
Honda Civic(2007)	72%	£1,676	£410	Grp 25-38	£2,641+£300
Ford Mondeo(2010)	75%	£1,397	£275	Grp 18-32	£2,227-£114
Audi A4(2011)	82%	£1,676	£410	Grp 30-42	£2,491+£150

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 2009 Mercedes 250

Is the 2009 Mercedes 250 reliable?

Excellent reliability. Very few MOT failures. 90% of MOT tests on 2009 Mercedes 250s ended in a pass, from 59 tests (DVSA MOT data for tests in 2024, retests included). That's 8 points above the average of 82% across all models in the same data.

How much does a 2009 Mercedes 250 cost to run?

Our estimate is £2,341 a year (£195 a month): £1,676 fuel, £410 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2009 Mercedes 250?

90% of 59 MOT tests on the 2009 Mercedes 250 ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 61st of 555 models first registered in 2009 (top 11%).

What is the average mileage for a 2009 Mercedes 250?

The average mileage recorded at MOT tests on the 2009 Mercedes 250 is 121,819 miles, which is in line with the expected 111,000 miles for a 15-year-old car, suggesting normal everyday use.