MERCEDES SPRINTER 314 PREMIUM CDI (2021)
Running costs, reliability data, and common problems from 91 real MOT tests.
Annual Cost
£2,195
£183/month
MOT Pass Rate
63%
Below Avg
Road Tax
£195
Flat rate/year
Insurance
Grp 25-38
2143cc Diesel
Proceed With Caution
63% pass rate, £2195/year to run. 19 points below average.
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Annual Running Costs
~40 mpg
Flat rate (post-2017)
Higher estimate due to low pass rate
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
Below average reliability. Budget extra for maintenance and repairs. That's 19 points below the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 5 years old, 63% of MERCEDES SPRINTER 314 PREMIUM CDIs from 2021 passed their MOT first time in 2026. That's based on 91 tests across the UK. The average mileage at this age is 54,380 miles.
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How Does It Compare?
Mileage Analysis
54,380
Average miles
37,000
Expected for age
The average 2021 MERCEDES SPRINTER 314 PREMIUM CDI has 54,380 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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About the 2021 MERCEDES SPRINTER 314 PREMIUM CDI
The 2021 MERCEDES SPRINTER 314 PREMIUM CDI is a family car with a 2143cc diesel engine. 91 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 100% of 2021 cars for MOT pass rates.
With an average of 54,380 miles at 5 years old, MERCEDES SPRINTER 314 PREMIUM CDI owners cover more miles than the average driver.
2021 MERCEDES SPRINTER 314 PREMIUM 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 PREMIUM CDI?
Total estimated annual running cost is £2,195 (£183/month), broken down as £1245 fuel, £195 road tax, £55 MOT, and £700 predicted repairs. The higher repair estimate reflects the 63% MOT pass rate. Cars in this bracket tend to need work on suspension, brakes, and emissions components.
Buying a Used 2021 MERCEDES SPRINTER 314 PREMIUM CDI
At 5 years old, the MERCEDES SPRINTER 314 PREMIUM CDI offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. Note: with only 91 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2021 MERCEDES SPRINTER 314 PREMIUM 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.
Higher Than Average Failure Rate
Watch outWith a 63% MOT pass rate, this model fails more often than most. Budget for unexpected repairs and get a thorough pre-purchase inspection.
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 PREMIUM 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 PREMIUM CDI(2021) | 63% | £1245 | £195 | Grp 25-38 | £2195 |
| FORD KUGA(2019) | 91% | £1037 | £190 | Grp 18-32 | £1482-£713 |
| FORD TRANSIT CUSTOM(2019) | 87% | £1037 | £190 | Grp 18-32 | £1632-£563 |
| BMW 118(2020) | 93% | £1037 | £190 | Grp 18-32 | £1482-£713 |
| VOLKSWAGEN T-ROC(2019) | 94% | £1037 | £190 | Grp 18-32 | £1482-£713 |
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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