How much does a 2009 MERCEDES CLS cost to run?

Estimated annual running cost is £2,195 (£183/month), including £1245 fuel, £395 road tax, £55 MOT, and £500 predicted repairs.

What is the MOT pass rate for a 2009 MERCEDES CLS?

The 2009 MERCEDES CLS has a 78% MOT pass rate based on 2,541 tests in 2026. This ranks 253 out of 575 cars from 2009.

Which year MERCEDES CLS is most reliable?

The 2019 MERCEDES CLS has the highest MOT pass rate at 90%. The least reliable year is 2009 at 78%.

What is the average mileage for a 2009 MERCEDES CLS?

The average mileage for a 2009 MERCEDES CLS is 114,393 miles, which is in line with the expected 125,800 miles for a 17-year-old car, suggesting normal everyday use.

MERCEDES CLS (2009)

Q: Is the 2009 MERCEDES CLS reliable?

Average reliability. Expect some repairs as it ages. 78% of MERCEDES CLSs from 2009 passed their MOT first time in 2026, based on 2,541 tests. That's 4 points below the national average of 82%.

Running costs, reliability data, and common problems from 2,541 real MOT tests.

Annual Cost

£2,195

£183/month

MOT Pass Rate

78%

Average

Road Tax

£395

Based on CC/year

Insurance

Grp 30-42

2987cc Diesel

Check Carefully

78% pass rate, £2195/year to run. Close to the national average.

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Diesel2987cc17 years old2,541 tests114k miles avg

Annual Running Costs

Fuel (Diesel, 2987cc)

~40 mpg

£1,245

Road Tax

Based on 2987cc

£395

MOT Test

£55

Predicted Repairs

£500

Total per year£2,195

Per month£183/mo

Per week£42/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

78% MOT pass rate(Average)

0%National avg: 82%100%

Average reliability. Expect some repairs as it ages. That's close to the national average of 82%. It falls below the MERCEDES brand average of 87%.

At 17 years old, 78% of MERCEDES CLSs from 2009 passed their MOT first time in 2026. That's based on 2,541 tests across the UK. The average mileage at this age is 114,393 miles.

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How Does It Compare?

Rank among 2009 cars253th of 575(top 44%)

Rank among MERCEDES models1158th of 1,408(top 82%)

vs national average-4%(82% avg)

vs 2009 cars average+3%(75% avg)

vs MERCEDES average-9%(87% avg)

Mileage Analysis

114,393

Average miles

125,800

Expected for age

The average 2009 MERCEDES CLS has 114,393 miles on the clock, which is in line with the expected 125,800 miles for a 17-year-old car, suggesting normal everyday use.

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Best Year to Buy?

The most reliable year is the 2019 model with a 90% MOT pass rate, while the 2009 model has the lowest at 78%. Consider a different year if reliability is a priority.

MERCEDES CLS by Year

Year	Pass Rate	Tests	Avg Mileage
2021	90%	149	25,838 mi
2020	85%	708	33,613 mi
2019	90%	2,938	42,687 mi
2018	89%	2,552	49,336 mi
2017	87%	3,475	61,581 mi
2016	87%	4,786	69,870 mi
2015	87%	6,871	81,130 mi
2014	85%	4,192	86,883 mi
2013	83%	7,096	95,825 mi
2012	83%	2,664	97,844 mi
2011	82%	2,675	100,976 mi
2010	79%	2,428	110,846 mi
2009	78%	2,541	114,393 mi
2008	78%	2,982	122,863 mi
2007	78%	3,915	122,774 mi
2006	79%	3,184	117,836 mi
2005	81%	1,944	108,622 mi

Similar Cars to Consider

BMW 3 SERIES

2008 · 2926cc Diesel

£1,900/year

80%

+2%

AUDI A4

2011 · 2967cc Diesel

£1,900/year

82%

+4%

AUDI A5

2010 · 2967cc Diesel

£1,900/year

82%

+4%

JAGUAR XF

2010 · 2993cc Diesel

£1,900/year

80%

+2%

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About the 2009 MERCEDES CLS

The 2009 MERCEDES CLS is a large car with a 2987cc diesel engine. 2,541 of these vehicles were MOT tested in 2026, making it a reasonably common sight on UK roads. Among all cars from 2009, the average MOT pass rate is 75%, and this model beats that benchmark.

With an average of 114,393 miles at 17 years old, MERCEDES CLS owners drive about as much as the UK average.

2009 MERCEDES CLS 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 2009 MERCEDES CLS?

Total estimated annual running cost is £2,195 (£183/month), broken down as £1245 fuel, £395 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 78% pass rate. Keeping on top of servicing will help avoid surprises.

MERCEDES CLS Reliability Trend

Newer MERCEDES CLSs show better MOT pass rates than older ones, with an average improvement of 7 percentage points.

Buying a Used 2009 MERCEDES CLS

At 17 years old, the MERCEDES CLS 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

Based on the 2009 MERCEDES CLS'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

Watch out

With an average of 114k 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 2009 MERCEDES CLS stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
MERCEDES CLS(2009)	78%	£1245	£395	Grp 30-42	£2195
BMW 3 SERIES(2008)	80%	£1245	£250	Grp 30-42	£1900-£295
AUDI A4(2011)	82%	£1245	£250	Grp 30-42	£1900-£295
AUDI A5(2010)	82%	£1245	£250	Grp 30-42	£1900-£295
JAGUAR XF(2010)	80%	£1245	£250	Grp 30-42	£1900-£295

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.