Is the Mercedes 320 reliable?

The Mercedes 320 has an average MOT pass rate of 79% across 12 years, based on 1,202 tests in 2024. That's 3 points below the national average of 82%. The most reliable year is 1994 with a 91% pass rate.

Which year Mercedes 320 is best?

The 1994 Mercedes 320 has the highest MOT pass rate at 91%, while the 2001 model has the lowest at 70%. There's a 21 percentage point spread between the best and worst years.

Mercedes 320 Running Costs, MOT Pass Rates & Reliability

Mercedes 320

Reliability, running costs, and MOT data across 12 years from 1,202 real MOT tests.

Avg Pass Rate

79%

Total Tests

1,202

Best Year

1994 (91%)

Years Covered

How reliable is the Mercedes 320?

vs national average-3% (82% avg)

vs Mercedes brand average-8% (87% avg)

Best to worst year spread21 percentage points

Reliability trendDeclining over years

Mercedes 320 by Year

Year	Pass Rate	Tests	Avg Mileage
2009	71%	72	117,144 mi
2008	75%	115	121,055 mi
2007	84%	148	128,327 mi
2006	78%	181	118,117 mi
2005	72%	58	125,364 mi
2004	78%	45	113,945 mi
2001	70%	37	99,359 mi
2000	74%	39	92,550 mi
1999	87%	31	120,105 mi
1994	91%	66	90,618 mi
1993	84%	376	120,168 mi
1992	88%	34	138,038 mi

Checking a specific Mercedes 320?

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About the Mercedes 320

The Mercedes 320 has been tested 1,202 times in 2024 MOT data across 12 model years (1992 to 2009), with an average pass rate of 79%. That's close to the national average of 82%. Available as petrol and diesel.

Best and Worst Years

The 1994 model is the most reliable with a 91% pass rate from 66 tests. The 2001 model has the lowest at 70%. With a 21 point spread, choosing the right year makes a big difference to reliability.

Reliability Trend

Older MERCEDES 320s tend to have better MOT pass rates than newer ones, with an average decline of 5 percentage points across model years.

Mileage Across Years

The oldest model in our data (1992) averages 138,038 miles, while the newest (2009) averages 117,144 miles. Older models have covered serious mileage, so suspension and drivetrain wear are worth checking.

Compared to the Mercedes brand average of 87%, the 320 is 8 points lower, placing it among the less reliable Mercedes models.

Click any year in the table above to see detailed running costs, individual reliability data, and comparisons with similar cars.