Mercedes-benz E vs Mercedes-benz Sl350: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Mercedes-benz E
79%
MOT pass rate · 429,719 vehicles
Mercedes-benz Sl350
82%
MOT pass rate · 21 vehicles
More reliable
Verdict: On MOT pass rate, the Mercedes-benz Sl350 is the more reliable of the two — 82% pass first time versus 79%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Mercedes-benz E | Mercedes-benz Sl350 |
|---|---|---|
| MOT pass rate | 79% | 82% ✓ |
| MOT failure rate | 21% | 18% ✓ |
| Faults & advisories per test | 1.6 | 1.5 ✓ |
| Dangerous-fault share | 3% ✓ | 4% |
| Average mileage | 124,278 mi | 78,760 mi |
| Sample size (vehicles) | 429,719 | 21 |
Most common faults
Mercedes-benz E
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
Mercedes-benz Sl350
- Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Front brake disc worn, pitted or scored, but not seriously weakened (3.5.1i)
- Front Brake pad(s) wearing thin (3.5.1g)
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Engine covers fitted obscuring some components in the engine bay
Reliability FAQ
On MOT pass rate, the Mercedes-benz Sl350 is the more reliable of the two — 82% pass first time versus 79%. It's one signal among several; check the full breakdown below.
Full Mercedes-benz E report Full Mercedes-benz Sl350 report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.