Mercedes Sl 400 grand edition auto
Reliability, running costs, and MOT data across 2 years from 147 real MOT tests.
Avg Pass Rate
91%
Total Tests
147
Best Year
2020 (96%)
Years Covered
2
About the Mercedes Sl 400 grand edition auto
The Mercedes Sl 400 grand edition auto has been tested 147 times in 2026 MOT data across 2 model years (2020 to 2021), with an average pass rate of 91%. That's comfortably above the national average of 82%, making it a reliable choice. Available as petrol.
Best and Worst Years
The 2020 model is the most reliable with a 96% pass rate from 113 tests. The 2021 model has the lowest at 85%. The 11 point spread between years means reliability varies somewhat, but no year is dramatically different.
Mileage Across Years
The oldest model in our data (2020) averages 15,215 miles, while the newest (2021) averages 18,981 miles.
Compared to the Mercedes brand average of 87%, the Sl 400 grand edition auto performs 4 points better, making it one of the more reliable options in the Mercedes range.
Estimated Running Costs
Based on 7,400 miles/year, current fuel prices, and MOT pass rate data. Insurance not included.
Full 2021 detailsHow reliable is the Mercedes Sl 400 grand edition auto?
Mercedes Sl 400 grand edition auto by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
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