How much does a 2004 MERCEDES UNCLASSIFIED cost to run?

Estimated annual running cost is £2,907 (£242/month), including £1592 fuel, £760 road tax, £55 MOT, and £500 predicted repairs.

What is the MOT pass rate for a 2004 MERCEDES UNCLASSIFIED?

The 2004 MERCEDES UNCLASSIFIED has a 79% MOT pass rate based on 298 tests in 2026. This ranks 139 out of 491 cars from 2004.

Which year MERCEDES UNCLASSIFIED is most reliable?

The 2021 MERCEDES UNCLASSIFIED has the highest MOT pass rate at 96%. The least reliable year is 1997 at 66%.

MERCEDES UNCLASSIFIED (2004)

Q: Is the 2004 MERCEDES UNCLASSIFIED reliable?

Average reliability. Expect some repairs as it ages. 79% of MERCEDES UNCLASSIFIEDs from 2004 passed their MOT first time in 2026, based on 298 tests. That's 3 points below the national average of 82%.

Q: What is the average mileage for a 2004 MERCEDES UNCLASSIFIED?

The average mileage for a 2004 MERCEDES UNCLASSIFIED is 91,119 miles, which is below the expected 162,800 miles for a 22-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Running costs, reliability data, and common problems from 298 real MOT tests.

Annual Cost

£2,907

£242/month

MOT Pass Rate

79%

Average

Road Tax

£760

Based on CC/year

Insurance

Grp 35-50

3190cc Petrol

Check Carefully

79% pass rate, £2907/year to run. Close to the national average.

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Petrol3190cc22 years old298 tests91k miles avg

Annual Running Costs

Fuel (Petrol, 3190cc)

~30 mpg

£1,592

Road Tax

Based on 3190cc

£760

MOT Test

£55

Predicted Repairs

£500

Total per year£2,907

Per month£242/mo

Per week£56/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 22 years old, 79% of MERCEDES UNCLASSIFIEDs from 2004 passed their MOT first time in 2026. That's based on 298 tests across the UK. The average mileage at this age is 91,119 miles.

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How Does It Compare?

Rank among 2004 cars139th of 491(top 28%)

Rank among MERCEDES models1131th of 1,408(top 80%)

vs national average-3%(82% avg)

vs 2004 cars average+7%(72% avg)

vs MERCEDES average-8%(87% avg)

Mileage Analysis

91,119

Average miles

162,800

Expected for age

The average 2004 MERCEDES UNCLASSIFIED has 91,119 miles on the clock, which is below the expected 162,800 miles for a 22-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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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 2004 sits between the two at 79%.

MERCEDES UNCLASSIFIED by Year

Year	Pass Rate	Tests	Avg Mileage
2021	96%	270	14,108 mi
2020	93%	237	17,059 mi
2019	95%	176	25,080 mi
2018	92%	202	40,291 mi
2017	91%	200	39,620 mi
2016	87%	326	45,907 mi
2015	91%	252	72,531 mi
2014	86%	289	83,046 mi
2013	89%	245	52,132 mi
2012	89%	185	66,863 mi
2011	90%	126	63,066 mi
2010	92%	98	94,655 mi
2009	79%	174	100,957 mi
2008	79%	354	111,482 mi
2007	81%	259	105,351 mi
2006	81%	240	95,112 mi
2005	79%	273	101,492 mi
2004	79%	298	91,119 mi
2003	73%	178	102,840 mi
2002	84%	214	129,941 mi
2001	73%	107	121,123 mi
2000	73%	195	116,472 mi
1999	78%	223	144,511 mi
1998	81%	155	139,571 mi
1997	66%	65	104,116 mi
1996	66%	101	175,170 mi
1995	78%	45	212,804 mi
1994	74%	86	85,110 mi
1993	89%	47	159,142 mi
1992	60%	40	117,020 mi
1991	73%	33	102,932 mi
1990	83%	58	95,507 mi

Similar Cars to Consider

LAND ROVER FREELANDER

2006 · 3192cc Petrol

£2,397/year

70%

-9%

MERCEDES E

2004 · 3199cc Petrol

£2,397/year

78%

-1%

PORSCHE BOXSTER

2005 · 3197cc Petrol

£2,247/year

86%

+7%

BMW X3

2006 · 2996cc Petrol

£2,397/year

78%

-1%

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About the 2004 MERCEDES UNCLASSIFIED

The 2004 MERCEDES UNCLASSIFIED is a performance with a 3190cc petrol engine. 298 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. Among all cars from 2004, the average MOT pass rate is 72%, and this model beats that benchmark.

With an average of 91,119 miles at 22 years old, MERCEDES UNCLASSIFIED owners tend to use this car less than the typical driver.

2004 MERCEDES UNCLASSIFIED Fuel Costs

The 3190cc 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 £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).

What does it cost to own a 2004 MERCEDES UNCLASSIFIED?

Total estimated annual running cost is £2,907 (£242/month), broken down as £1592 fuel, £760 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 2004 MERCEDES UNCLASSIFIED

At 22 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 2004 MERCEDES UNCLASSIFIED's fuel type, age, and engine size, these are the most likely problem areas to check.

Timing Chain / Belt

Watch out

At 22 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.

Clutch Wear

Medium risk

With an average of 91k 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 2004 MERCEDES UNCLASSIFIED stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
MERCEDES UNCLASSIFIED(2004)	79%	£1592	£760	Grp 35-50	£2907
LAND ROVER FREELANDER(2006)	70%	£1592	£250	Grp 35-50	£2397-£510
MERCEDES E(2004)	78%	£1592	£250	Grp 35-50	£2397-£510
PORSCHE BOXSTER(2005)	86%	£1592	£250	Grp 35-50	£2247-£660
BMW X3(2006)	78%	£1592	£250	Grp 30-42	£2397-£510

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.