MERCEDES 320 (2009)
Running costs, common problems, and reliability data based on 72 real MOT tests in 2024.
MOT Pass Rate
71%
Total Tests (2024)
72
Avg Mileage
117,144 mi
Est. Annual Cost
£2,050
Is the 2009 MERCEDES 320 reliable?
Average reliability. Expect some repairs as it ages. That's 11 points below the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 15 years old, 71% of MERCEDES 320s from 2009 passed their MOT first time in 2024. That's based on 72 tests across the UK. The average mileage at this age is 117,144 miles.
How does the 2009 MERCEDES 320 compare?
Mileage Analysis
The average 2009 MERCEDES 320 has 117,144 miles on the clock, which is in line with the expected 111,000 miles for a 15-year-old car, suggesting normal everyday use.
Best year to buy a MERCEDES 320?
The most reliable year is the 1994 model with a 91% MOT pass rate, while the 2009 model has the lowest at 71%. Consider a different year if reliability is a priority.
How much does a 2009 MERCEDES 320 cost to run?
Higher than average due to low pass rate
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
MERCEDES 320 by Year
Checking a specific MERCEDES 320?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2009 MERCEDES 320
The 2009 MERCEDES 320 is a performance with a 3199cc diesel engine. 72 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It sits in the bottom 80% of 2009 cars for MOT pass rates.
With an average of 117,144 miles at 15 years old, MERCEDES 320 owners drive about as much as the UK average.
2009 MERCEDES 320 Fuel Costs
The 3199cc 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 2009 MERCEDES 320?
Total estimated annual running cost is £2,050 (£171/month), broken down as £1245 fuel, £250 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 71% pass rate. Keeping on top of servicing will help avoid surprises.
MERCEDES 320 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.
Buying a Used 2009 MERCEDES 320
At 15 years old, the MERCEDES 320 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 72 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2009 MERCEDES 320
If reliability is your priority, there are 4 similar cars with a higher MOT pass rate. Here are comparable diesel cars with similar engines:
- BMW 3 SERIES (2008) 80% pass rate (+9%) from 48,705 tests
- AUDI A4 (2011) 82% pass rate (+11%) from 26,901 tests
- AUDI A5 (2010) 82% pass rate (+11%) from 22,181 tests
- JAGUAR XF (2010) 80% pass rate (+9%) from 19,704 tests