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MERCEDES UNCLASSIFIED (2008)

Running costs, reliability data, and common problems from 354 real MOT tests.

Annual Cost

£2,195

£183/month

MOT Pass Rate

79%

Average

Road Tax

£395

Based on CC/year

Insurance

Grp 25-38

2148cc Diesel

Check Carefully

79% pass rate, £2195/year to run. Close to the national average.

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Diesel2148cc18 years old354 tests111k miles avg

Annual Running Costs

Fuel (Diesel, 2148cc)

~40 mpg

£1,245
Road Tax

Based on 2148cc

£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

79% 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 18 years old, 79% of MERCEDES UNCLASSIFIEDs from 2008 passed their MOT first time in 2026. That's based on 354 tests across the UK. The average mileage at this age is 111,482 miles.

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How Does It Compare?

Rank among 2008 cars243th of 589(top 41%)
Rank among MERCEDES models1129th of 1,408(top 80%)
vs national average-3%(82% avg)
vs 2008 cars average+6%(73% avg)
vs MERCEDES average-8%(87% avg)

Mileage Analysis

111,482

Average miles

vs

133,200

Expected for age

The average 2008 MERCEDES UNCLASSIFIED has 111,482 miles on the clock, which is in line with the expected 133,200 miles for a 18-year-old car, suggesting normal everyday use.

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Best Year to Buy?

The most reliable year is the 2021 model with a 96% MOT pass rate, while the 1997 model has the lowest at 66%. The 2008 sits between the two at 79%.

MERCEDES UNCLASSIFIED by Year

YearPass RateTestsAvg Mileage
202196%27014,108 mi
202093%23717,059 mi
201995%17625,080 mi
201892%20240,291 mi
201791%20039,620 mi
201687%32645,907 mi
201591%25272,531 mi
201486%28983,046 mi
201389%24552,132 mi
201289%18566,863 mi
201190%12663,066 mi
201092%9894,655 mi
200979%174100,957 mi
200879%354111,482 mi
200781%259105,351 mi
200681%24095,112 mi
200579%273101,492 mi
200479%29891,119 mi
200373%178102,840 mi
200284%214129,941 mi
200173%107121,123 mi
200073%195116,472 mi
199978%223144,511 mi
199881%155139,571 mi
199766%65104,116 mi
199666%101175,170 mi
199578%45212,804 mi
199474%8685,110 mi
199389%47159,142 mi
199260%40117,020 mi
199173%33102,932 mi
199083%5895,507 mi

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About the 2008 MERCEDES UNCLASSIFIED

The 2008 MERCEDES UNCLASSIFIED is a family car with a 2148cc diesel engine. 354 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. Among all cars from 2008, the average MOT pass rate is 73%, and this model beats that benchmark.

With an average of 111,482 miles at 18 years old, MERCEDES UNCLASSIFIED owners drive about as much as the UK average.

2008 MERCEDES UNCLASSIFIED Fuel Costs

The 2148cc diesel engine offers a reasonable balance between performance and economy. 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 2008 MERCEDES UNCLASSIFIED?

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 79% pass rate. Keeping on top of servicing will help avoid surprises.

MERCEDES UNCLASSIFIED Reliability Trend

Newer MERCEDES UNCLASSIFIEDs show better MOT pass rates than older ones, with an average improvement of 13 percentage points.

Buying a Used 2008 MERCEDES UNCLASSIFIED

At 18 years old, the MERCEDES UNCLASSIFIED 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 2021 model has the highest pass rate at 96%.

Common Issues to Watch For

Based on the 2008 MERCEDES UNCLASSIFIED'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 111k 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 2008 MERCEDES UNCLASSIFIED stacks up against similar cars for annual running costs, insurance, and tax.

CarPass RateFuel/yrTax/yrInsuranceTotal/yr
MERCEDES UNCLASSIFIED(2008)79%£1245£395Grp 25-38£2195
VAUXHALL ASTRA(2010)74%£1037£135Grp 18-32£1727-£468
VOLKSWAGEN GOLF(2010)77%£1037£135Grp 18-32£1727-£468
HONDA CIVIC(2007)72%£1245£250Grp 25-38£2050-£145
VAUXHALL ZAFIRA(2010)72%£1037£135Grp 18-32£1727-£468

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.

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