MERCEDES CITAN 109 PURE CDI (2021)
Running costs, common problems, and reliability data based on 1,443 real MOT tests in 2024.
MOT Pass Rate
83%
Total Tests (2024)
1,443
Avg Mileage
51,525 mi
Est. Annual Cost
£1,500
Is the 2021 MERCEDES CITAN 109 PURE CDI reliable?
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 3 years old, 83% of MERCEDES CITAN 109 PURE CDIs from 2021 passed their MOT first time in 2024. That's based on 1,443 tests across the UK. The average mileage at this age is 51,525 miles.
How does the 2021 MERCEDES CITAN 109 PURE CDI compare?
Mileage Analysis
The average 2021 MERCEDES CITAN 109 PURE CDI has 51,525 miles on the clock, which is well above the expected 22,200 miles for a 3-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.
Best year to buy a MERCEDES CITAN 109 PURE CDI?
The most reliable year is the 2019 model with a 89% MOT pass rate, while the 2020 model has the lowest at 81%. The 2021 sits between the two at 83%.
How much does a 2021 MERCEDES CITAN 109 PURE CDI 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 CITAN 109 PURE CDI by Year
Checking a specific MERCEDES CITAN 109 PURE CDI?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 MERCEDES CITAN 109 PURE CDI
The 2021 MERCEDES CITAN 109 PURE CDI is a small family car with a 1461cc diesel engine. 1,443 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It sits in the bottom 95% of 2021 cars for MOT pass rates.
With an average of 51,525 miles at 3 years old, MERCEDES CITAN 109 PURE CDI owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.
2021 MERCEDES CITAN 109 PURE CDI Fuel Costs
The 1461cc diesel engine offers a reasonable balance between performance and economy. Expect around 55 mpg in mixed driving, which works out to roughly £905 per year at current diesel prices of 148p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 MERCEDES CITAN 109 PURE CDI?
Total estimated annual running cost is £1,500 (£125/month), broken down as £905 fuel, £190 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 83% pass rate. Keeping on top of servicing will help avoid surprises.
MERCEDES CITAN 109 PURE CDI Reliability Trend
Older MERCEDES CITAN 109 PURE CDIs tend to have better MOT pass rates than newer ones, with an average decline of 7 percentage points across model years.
Buying a Used 2021 MERCEDES CITAN 109 PURE CDI
At 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet. If you're flexible on year, the 2019 model has the highest pass rate at 89%.
Alternatives to the 2021 MERCEDES CITAN 109 PURE CDI
If reliability is your priority, there are 4 similar cars with a higher MOT pass rate. Here are comparable diesel cars with similar engines:
- FORD FOCUS (2019) 89% pass rate (+6%) from 93,803 tests
- MERCEDES A (2019) 91% pass rate (+8%) from 89,588 tests
- VOLKSWAGEN POLO (2019) 89% pass rate (+6%) from 65,751 tests
- KIA SPORTAGE (2019) 89% pass rate (+6%) from 58,319 tests