MERCEDES C 320 (2009)
Running costs, common problems, and reliability data based on 311 real MOT tests in 2024.
MOT Pass Rate
76%
Total Tests (2024)
311
Avg Mileage
121,062 mi
Est. Annual Cost
£2,050
Is the 2009 MERCEDES C 320 reliable?
Average reliability. Expect some repairs as it ages. That's 6 points below the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 15 years old, 76% of MERCEDES C 320s from 2009 passed their MOT first time in 2024. That's based on 311 tests across the UK. The average mileage at this age is 121,062 miles.
How does the 2009 MERCEDES C 320 compare?
Mileage Analysis
The average 2009 MERCEDES C 320 has 121,062 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 C 320?
The most reliable year is the 2007 model with a 82% MOT pass rate, while the 2002 model has the lowest at 72%. The 2009 sits between the two at 76%.
How much does a 2009 MERCEDES C 320 cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
MERCEDES C 320 by Year
Checking a specific MERCEDES C 320?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2009 MERCEDES C 320
The 2009 MERCEDES C 320 is a large car with a 2987cc diesel engine. 311 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. Among all cars from 2009, the average MOT pass rate is 75%, and this model beats that benchmark.
With an average of 121,062 miles at 15 years old, MERCEDES C 320 owners drive about as much as the UK average.
2009 MERCEDES C 320 Fuel Costs
The 2987cc 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 C 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 76% pass rate. Keeping on top of servicing will help avoid surprises.
MERCEDES C 320 Reliability Trend
The MERCEDES C 320 has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.
Buying a Used 2009 MERCEDES C 320
At 15 years old, the MERCEDES C 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. If you're flexible on year, the 2007 model has the highest pass rate at 82%.
Alternatives to the 2009 MERCEDES C 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 (+4%) from 48,705 tests
- AUDI A4 (2011) 82% pass rate (+6%) from 26,901 tests
- AUDI A5 (2010) 82% pass rate (+6%) from 22,181 tests
- JAGUAR XF (2010) 80% pass rate (+4%) from 19,704 tests