Ford Fiesta vs Mercedes E: Which is Better? (2026)
Side-by-side comparison of the Ford Fiesta and Mercedes E, covering MOT pass rates, running costs, common faults, and overall reliability. Based on 2,980,285 real MOT tests.
Quick Verdict
This is a very close comparison. The Ford Fiesta (78% pass rate) and Mercedes E (85% pass rate) are evenly matched on reliability. Your decision should come down to personal preference, running costs, and which feels better to drive. Both are solid choices in the small family car segment.
Ford Fiesta
78%
MOT pass rate
2,484,327 tests
Mercedes E
85%
MOT pass rate
495,958 tests
More reliableFull Comparison: Ford Fiesta vs Mercedes E
| Category | Ford Fiesta | Mercedes E |
|---|---|---|
| MOT Pass Rate | 78% | 85%Winner |
| MOT Fail Rate | 22% | 15%Winner |
| vs National Avg | -4 pts | +3 ptsWinner |
| Est. Fuel Cost (8,000 mi/yr) | £1,195Winner | £1,359 |
| Insurance Group | 6-15 | 22-32 |
| Est. Depreciation/yr | £1,200-£2,200 | £1,500-£3,000 |
| Engine Size | 1.3L | 2.6L |
| Fuel Type(s) | Petrol, Diesel | Diesel, Electric, Petrol |
| Segment | Small family car | Large car |
| Avg Mileage | 66,345 miWinner | 105,685 mi |
| MOT Tests Analysed | 2,484,327 | 495,958 |
| Model Years | 33 years | 34 years |
| Best Year | 2021 (94%) | 2022 (96%)Winner |
| Worst Year | 1998 (65%) | 1997 (77%)Winner |
| Reliability Trend | Improving | Improving |
Common Problems Comparison
Ford Fiesta Known Issues
- •DPF and emissions issues (diesel models)
- •Suspension wear on older models
- •Lighting defects (common on all cars)
Mercedes E Known Issues
- •DPF and emissions issues (diesel models)
- •Higher tyre and brake wear (larger engine)
- •Suspension wear on older models
- •Lighting defects (common on all cars)
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Ford Fiesta vs Mercedes E FAQ
Which is more reliable, the Ford Fiesta or Mercedes E?
Based on MOT data, the Mercedes E is more reliable with a 85% pass rate, compared to 78% for the Ford Fiesta.
Which is cheaper to run?
At 8,000 miles per year, the Ford Fiesta costs around £1,195 in fuel, while the Mercedes E costs around £1,359. The Ford Fiesta is cheaper on fuel. Insurance, depreciation, and repair costs also factor into total running costs.
Should I buy a Ford Fiesta or Mercedes E?
This is a very close comparison. The Ford Fiesta (78% pass rate) and Mercedes E (85% pass rate) are evenly matched on reliability. Your decision should come down to personal preference, running costs, and which feels better to drive. Both are solid choices in the small family car segment.
Ford Fiesta Running Costs
Full breakdown of annual costs, reliability, and MOT data
Mercedes E Running Costs
Full breakdown of annual costs, reliability, and MOT data
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