How much does a 2021 MERCEDES CITAN 109 PURE CDI cost to run?

Estimated annual running cost is £1,505 (£125/month), including £905 fuel, £195 road tax, £55 MOT, and £350 predicted repairs.

What is the MOT pass rate for a 2021 MERCEDES CITAN 109 PURE CDI?

The 2021 MERCEDES CITAN 109 PURE CDI has a 83% MOT pass rate based on 1,443 tests in 2026. This ranks 3199 out of 3373 cars from 2021.

Which year MERCEDES CITAN 109 PURE CDI is most reliable?

The 2019 MERCEDES CITAN 109 PURE CDI has the highest MOT pass rate at 89%. The least reliable year is 2020 at 81%.

MERCEDES CITAN 109 PURE CDI (2021)

Q: Is the 2021 MERCEDES CITAN 109 PURE CDI reliable?

Good reliability. Occasional issues but generally solid. 83% of MERCEDES CITAN 109 PURE CDIs from 2021 passed their MOT first time in 2026, based on 1,443 tests. That's 1 points above the national average of 82%.

Q: What is the average mileage for a 2021 MERCEDES CITAN 109 PURE CDI?

The average mileage for a 2021 MERCEDES CITAN 109 PURE CDI is 51,525 miles, which is above the expected 37,000 miles for a 5-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.

Running costs, reliability data, and common problems from 1,443 real MOT tests.

Annual Cost

£1,505

£125/month

MOT Pass Rate

83%

Good

Road Tax

£195

Flat rate/year

Insurance

Grp 12-25

1461cc Diesel

Solid Option

83% pass rate, £1505/year to run. Close to the national average.

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Diesel1461cc5 years old1,443 tests52k miles avg

Annual Running Costs

Fuel (Diesel, 1461cc)

~55 mpg

£905

Road Tax

Flat rate (post-2017)

£195

MOT Test

£55

Predicted Repairs

£350

Total per year£1,505

Per month£125/mo

Per week£29/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

83% 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%. It falls below the MERCEDES brand average of 87%.

At 5 years old, 83% of MERCEDES CITAN 109 PURE CDIs from 2021 passed their MOT first time in 2026. That's based on 1,443 tests across the UK. The average mileage at this age is 51,525 miles.

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How Does It Compare?

Rank among 2021 cars3199th of 3,373(top 95%)

Rank among MERCEDES models969th of 1,408(top 69%)

vs national average+1%(82% avg)

vs 2021 cars average-9%(92% avg)

vs MERCEDES average-4%(87% avg)

Mileage Analysis

51,525

Average miles

37,000

Expected for age

The average 2021 MERCEDES CITAN 109 PURE CDI has 51,525 miles on the clock, which is above the expected 37,000 miles for a 5-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.

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Best Year to Buy?

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%.

MERCEDES CITAN 109 PURE CDI by Year

Year	Pass Rate	Tests	Avg Mileage
2021	83%	1,443	51,525 mi
2020	81%	1,922	63,019 mi
2019	89%	161	78,945 mi

Similar Cars to Consider

FORD FOCUS

2019 · 1499cc Diesel

£1,500/year

89%

+6%

MERCEDES A

2019 · 1461cc Diesel

£1,350/year

91%

+8%

VOLKSWAGEN POLO

2019 · 1598cc Diesel

£1,500/year

89%

+6%

KIA SPORTAGE

2019 · 1598cc Diesel

£1,500/year

89%

+6%

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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 2026, 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 5 years old, MERCEDES CITAN 109 PURE CDI owners cover more miles than the average driver.

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). 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 2021 MERCEDES CITAN 109 PURE CDI?

Total estimated annual running cost is £1,505 (£125/month), broken down as £905 fuel, £195 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 5 years old, the MERCEDES CITAN 109 PURE CDI offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2019 model has the highest pass rate at 89%.

Common Issues to Watch For

Based on the 2021 MERCEDES CITAN 109 PURE CDI'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

Medium risk

Diesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.

AdBlue System

Medium risk

Post-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.

EGR Valve

Low risk

Exhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.

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 2021 MERCEDES CITAN 109 PURE CDI stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
MERCEDES CITAN 109 PURE CDI(2021)	83%	£905	£195	Grp 12-25	£1505
FORD FOCUS(2019)	89%	£905	£190	Grp 12-25	£1500-£5
MERCEDES A(2019)	91%	£905	£190	Grp 12-25	£1350-£155
VOLKSWAGEN POLO(2019)	89%	£905	£190	Grp 12-25	£1500-£5
KIA SPORTAGE(2019)	89%	£905	£190	Grp 12-25	£1500-£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.