MERCEDES SPRINTER 314 PROGRESSIVE CDI (2021)
Running costs, reliability data, and common problems from 116 real MOT tests.
Annual Cost
£1,995
£166/month
MOT Pass Rate
78%
Average
Road Tax
£195
Flat rate/year
Insurance
Grp 25-38
2143cc Diesel
Check Carefully
78% pass rate, £1995/year to run. Close to the national average.
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Annual Running Costs
~40 mpg
Flat rate (post-2017)
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
Average reliability. Expect some repairs as it ages. That's close to the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 5 years old, 78% of MERCEDES SPRINTER 314 PROGRESSIVE CDIs from 2021 passed their MOT first time in 2026. That's based on 116 tests across the UK. The average mileage at this age is 87,372 miles.
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How Does It Compare?
Mileage Analysis
87,372
Average miles
37,000
Expected for age
The average 2021 MERCEDES SPRINTER 314 PROGRESSIVE CDI has 87,372 miles on the clock, which is well above the expected 37,000 miles for a 5-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.
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Best Year to Buy?
The most reliable year is the 2020 model with a 92% MOT pass rate, while the 2021 model has the lowest at 78%. Consider a different year if reliability is a priority.
MERCEDES SPRINTER 314 PROGRESSIVE CDI by Year
Similar Cars to Consider
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About the 2021 MERCEDES SPRINTER 314 PROGRESSIVE CDI
The 2021 MERCEDES SPRINTER 314 PROGRESSIVE CDI is a family car with a 2143cc diesel engine. 116 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 99% of 2021 cars for MOT pass rates.
With an average of 87,372 miles at 5 years old, MERCEDES SPRINTER 314 PROGRESSIVE 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 SPRINTER 314 PROGRESSIVE CDI Fuel Costs
The 2143cc diesel engine offers a reasonable balance between performance and economy. 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 2021 MERCEDES SPRINTER 314 PROGRESSIVE CDI?
Total estimated annual running cost is £1,995 (£166/month), broken down as £1245 fuel, £195 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 78% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2021 MERCEDES SPRINTER 314 PROGRESSIVE CDI
At 5 years old, the MERCEDES SPRINTER 314 PROGRESSIVE CDI offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Common Issues to Watch For
Based on the 2021 MERCEDES SPRINTER 314 PROGRESSIVE CDI's fuel type, age, and engine size, these are the most likely problem areas to check.
DPF (Diesel Particulate Filter)
Watch outShort journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.
Turbo Wear
Medium riskDiesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.
AdBlue System
Medium riskPost-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.
EGR Valve
Low riskExhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.
Dual Mass Flywheel
Medium riskLarger diesel engines put extra strain on the dual mass flywheel. Listen for rattling at idle. Replacement with clutch is £800-£1,500.
Clutch Wear
Medium riskWith an average of 87k miles, clutch replacement may be due (typical lifespan 60,000-100,000 miles). Budget £400-£800 for a new clutch kit.
Brake Discs and Pads
Medium riskHigh-mileage cars often need brake disc replacement, not just pads. A full set of discs and pads costs £200-£500 per axle.
Service History
Low riskAlways 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 SPRINTER 314 PROGRESSIVE CDI stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MERCEDES SPRINTER 314 PROGRESSIVE CDI(2021) | 78% | £1245 | £195 | Grp 25-38 | £1995 |
| FORD KUGA(2019) | 91% | £1037 | £190 | Grp 18-32 | £1482-£513 |
| FORD TRANSIT CUSTOM(2019) | 87% | £1037 | £190 | Grp 18-32 | £1632-£363 |
| BMW 118(2020) | 93% | £1037 | £190 | Grp 18-32 | £1482-£513 |
| VOLKSWAGEN T-ROC(2019) | 94% | £1037 | £190 | Grp 18-32 | £1482-£513 |
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.
Related Mercedes Models
Explore other Mercedes cars or similar models in the same category.
MERCEDES A
2019 · 1461cc Diesel
MERCEDES C
2017 · 1991cc Hybrid
MERCEDES A-CLASS
2017 · 1461cc Diesel
FORD KUGA
2019 · 1997cc Diesel
FORD TRANSIT CUSTOM
2019 · 2000cc Diesel
BMW 118
2020 · 1995cc Diesel
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