Mercedes 350 (2008)

Estimated running costs and MOT pass rates from 46 MOT tests in 2024.

Annual Cost

£3,003

£250/month

MOT Pass Rate

98%

Excellent

Road Tax

£790

Estimated/year

Est. Insurance

Grp 35-50

3498cc Petrol

Great Choice

98% pass rate, £3,003/year to run. 16 points above average.

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Petrol3498cc18 years old46 tests57k miles avg

Annual Running Costs

Fuel (Petrol, 3498cc)

~30 mpg

£1,958

Road Tax

Estimated CO2 band

£790

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£3,003

Per month£250/mo

Per week£58/wk

Estimates based on 7,400 miles/year (UK average), petrol at 174.57p 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

98% MOT pass rate(Excellent)

0%All-model avg: 82%100%

Excellent reliability. Very few MOT failures. That's 16 points above the average of 82% across all models in our data. It also outperforms the Mercedes brand average of 87%.

98% of MOT tests on Mercedes 350s from 2008 ended in a pass in 2024, when they were about 16 years old. That's based on 46 tests across the UK, retests included. The average mileage recorded at those tests was 57,282 miles.

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How Does It Compare?

Rank among 2008 models9th of 566(top 2%)

Rank among Mercedes models104th of 1,376(top 8%)

vs average of all models+16%(82% avg)

vs 2008 models average+25%(73% avg)

vs Mercedes average+11%(87% avg)

Mileage Analysis

57,282

Average miles

118,400

Expected for age

The average 2008 Mercedes 350 had 57,282 miles on the clock at its 2024 MOT, which is significantly below the expected 118,400 miles for a 16-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.

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Mercedes 350 by Year

Year	Pass Rate	Tests	Avg Mileage
2016	91%	46	60,010 mi
2012	91%	34	90,714 mi
2011	81%	43	116,323 mi
2010	87%	93	89,441 mi
2008	98%	46	57,282 mi

Similar Cars to Consider

Land Rover Freelander

2007 · 3192cc Petrol

£3,303/year

75%

-23%

Mercedes E

2010 · 3495cc Petrol

£3,153/year

80%

-18%

Mercedes CLC

2009 · 3199cc Petrol

£3,303/year

73%

-25%

Porsche 911

2006 · 3824cc Petrol

£3,003/year

90%

-8%

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About the 2008 Mercedes 350

The 2008 Mercedes 350 is a premium performance car. Our records list a 3498cc petrol engine, though engines vary between versions. 46 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It ranks in the top 2% of all 2008 models for MOT pass rate.

With an average of 57,282 miles recorded at its 2024 MOT tests, Mercedes 350 owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.

2008 Mercedes 350 Fuel Costs

The 3498cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,958 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).

What does it cost to own a 2008 Mercedes 350?

Total estimated annual running cost is £3,003 (£250/month), broken down as £1,958 fuel, £790 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 98% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Buying a Used 2008 Mercedes 350

At 18 years old, the Mercedes 350 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 46 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.

Timing Chain / Belt

Watch out

At 18 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.

Oil Consumption

Medium risk

Larger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.

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.

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 2008 Mercedes 350 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 350(2008)	98%	£1,958	£790	Grp 35-50	£3,003
Land Rover Freelander(2007)	75%	£1,958	£790	Grp 35-50	£3,303+£300
Mercedes E(2010)	80%	£1,958	£790	Grp 35-50	£3,153+£150
Mercedes CLC(2009)	73%	£1,958	£790	Grp 35-50	£3,303+£300
Porsche 911(2006)	90%	£1,958	£790	Grp 35-50	£3,003same

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 2008 Mercedes 350

Is the 2008 Mercedes 350 reliable?

Excellent reliability. Very few MOT failures. 98% of MOT tests on 2008 Mercedes 350s ended in a pass, from 46 tests (DVSA MOT data for tests in 2024, retests included). That's 16 points above the average of 82% across all models in the same data.

How much does a 2008 Mercedes 350 cost to run?

Our estimate is £3,003 a year (£250 a month): £1,958 fuel, £790 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 2008 Mercedes 350?

98% of 46 MOT tests on the 2008 Mercedes 350 ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 9th of 566 models first registered in 2008 (top 2%).

What is the average mileage for a 2008 Mercedes 350?

The average mileage recorded at MOT tests on the 2008 Mercedes 350 is 57,282 miles, which is significantly below the expected 118,400 miles for a 16-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.