Bmw 5 Series vs Mercedes-Benz E-Class: Compare by Reg (2026)
Side-by-side comparison of the Bmw 5 Series and Mercedes-Benz E-Class, covering MOT pass rates, running costs, common faults, and overall reliability. Based on 651,514 real MOT tests.
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Quick Verdict
The Bmw 5 Series edges ahead in this comparison with a 89% MOT pass rate versus 85% for the Mercedes-Benz E-Class. The difference is modest, so both are reasonable choices. The Bmw 5 Series has a slight reliability advantage, while the Mercedes-Benz E-Class may offer other benefits depending on your priorities.
Bmw 5 Series
89%
MOT pass rate
155,556 tests
More reliableMercedes-Benz E-Class
85%
MOT pass rate
495,958 tests
Full Comparison: Bmw 5 Series vs Mercedes-Benz E-Class
| Category | Bmw 5 Series | Mercedes-Benz E-Class |
|---|---|---|
| MOT Pass Rate | 89%Winner | 85% |
| MOT Fail Rate | 11%Winner | 15% |
| vs National Avg | +7 ptsWinner | +3 pts |
| Est. Fuel Cost (8,000 mi/yr) | £1,115Winner | £1,359 |
| Insurance Group | 30-42 | 22-32 |
| Est. Depreciation/yr | £3,000-£5,000 | £1,500-£3,000 |
| Engine Size | 2.6L | 2.6L |
| Fuel Type(s) | Hybrid, Petrol, Diesel | Diesel, Electric, Petrol |
| Segment | Premium performance | Large car |
| Avg Mileage | 113,218 mi | 105,685 miWinner |
| MOT Tests Analysed | 155,556 | 495,958 |
| Model Years | 30 years | 34 years |
| Best Year | 2023 (98%)Winner | 2022 (96%) |
| Worst Year | 1999 (71%) | 1997 (77%)Winner |
| Reliability Trend | Improving | Improving |
Common Problems Comparison
Bmw 5 Series 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)
Mercedes-Benz E-Class 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)
Check a Specific Bmw 5 Series
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Bmw 5 Series vs Mercedes-Benz E-Class FAQ
Which is more reliable, the Bmw 5 Series or Mercedes-Benz E-Class?
Based on MOT data, the Bmw 5 Series is more reliable with a 89% pass rate, compared to 85% for the Mercedes-Benz E-Class.
Which is cheaper to run?
At 8,000 miles per year, the Bmw 5 Series costs around £1,115 in fuel, while the Mercedes-Benz E-Class costs around £1,359. The Bmw 5 Series is cheaper on fuel. Insurance, depreciation, and repair costs also factor into total running costs.
Should I buy a Bmw 5 Series or Mercedes-Benz E-Class?
The Bmw 5 Series edges ahead in this comparison with a 89% MOT pass rate versus 85% for the Mercedes-Benz E-Class. The difference is modest, so both are reasonable choices. The Bmw 5 Series has a slight reliability advantage, while the Mercedes-Benz E-Class may offer other benefits depending on your priorities.
Bmw 5 Series Running Costs
Full breakdown of annual costs, reliability, and MOT data
Mercedes-Benz E-Class Running Costs
Full breakdown of annual costs, reliability, and MOT data
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