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MERCEDES 312 (1996)

Running costs, reliability data, and common problems from 91 real MOT tests.

Annual Cost

£2,045

£170/month

MOT Pass Rate

84%

Good

Road Tax

£395

Based on CC/year

Insurance

Grp 30-42

2874cc Diesel

Solid Option

84% pass rate, £2045/year to run. Close to the national average.

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Diesel2874cc30 years old91 tests121k miles avg

Annual Running Costs

Fuel (Diesel, 2874cc)

~40 mpg

£1,245
Road Tax

Based on 2874cc

£395
MOT Test
£55
Predicted Repairs
£350
Total per year£2,045
Per month£170/mo
Per week£39/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

84% MOT pass rate(Good)
0%National avg: 82%100%

Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.

At 30 years old, 84% of MERCEDES 312s from 1996 passed their MOT first time in 2026. That's based on 91 tests across the UK. The average mileage at this age is 120,870 miles.

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How Does It Compare?

Rank among 1996 cars56th of 252(top 22%)
Rank among MERCEDES models948th of 1,408(top 67%)
vs national average+2%(82% avg)
vs 1996 cars average+9%(75% avg)
vs MERCEDES average-3%(87% avg)

Mileage Analysis

120,870

Average miles

vs

222,000

Expected for age

The average 1996 MERCEDES 312 has 120,870 miles on the clock, which is below the expected 222,000 miles for a 30-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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MERCEDES 312 by Year

YearPass RateTestsAvg Mileage
199981%43150,478 mi
199872%82130,350 mi
199763%89148,765 mi
199684%91120,870 mi

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About the 1996 MERCEDES 312

The 1996 MERCEDES 312 is a large car with a 2874cc diesel engine. 91 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 22% of all 1996 cars for reliability.

With an average of 120,870 miles at 30 years old, MERCEDES 312 owners tend to use this car less than the typical driver.

1996 MERCEDES 312 Fuel Costs

The 2874cc 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 1996 MERCEDES 312?

Total estimated annual running cost is £2,045 170/month), broken down as £1245 fuel, £395 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 84% pass rate. Keeping on top of servicing will help avoid surprises.

MERCEDES 312 Reliability Trend

Older MERCEDES 312s tend to have better MOT pass rates than newer ones, with an average decline of 17 percentage points across model years.

Buying a Used 1996 MERCEDES 312

At 30 years old, the MERCEDES 312 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 91 tests in our data, these figures should be treated as indicative rather than definitive.

Common Issues to Watch For

Based on the 1996 MERCEDES 312'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 121k 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 1996 MERCEDES 312 stacks up against similar cars for annual running costs, insurance, and tax.

CarPass RateFuel/yrTax/yrInsuranceTotal/yr
MERCEDES 312(1996)84%£1245£395Grp 30-42£2045
VOLKSWAGEN TRANSPORTER(1998)69%£1245£250Grp 25-38£2250+£205
LAND ROVER DEFENDER(1997)76%£1245£250Grp 25-38£2050+£5
LAND ROVER DISCOVERY(1998)77%£1245£250Grp 25-38£2050+£5
FORD TRANSIT(1998)72%£1245£250Grp 25-38£2050+£5

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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