Mercedes Sl 400 grand edition premium a
Reliability, running costs, and MOT data across 3 years from 494 real MOT tests.
Avg Pass Rate
98%
Total Tests
494
Best Year
2021 (100%)
Years Covered
3
How reliable is the Mercedes Sl 400 grand edition premium a?
Mercedes Sl 400 grand edition premium a by Year
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About the Mercedes Sl 400 grand edition premium a
The Mercedes Sl 400 grand edition premium a has been tested 494 times in 2024 MOT data across 3 model years (2019 to 2021), with an average pass rate of 98%. That's comfortably above the national average of 82%, making it a reliable choice. Available as petrol.
Best and Worst Years
The 2021 model is the most reliable with a 100% pass rate from 41 tests. The 2020 model has the lowest at 97%. With just a 3 point spread, the Sl 400 grand edition premium a is consistently reliable regardless of year.
Mileage Across Years
The oldest model in our data (2019) averages 21,109 miles, while the newest (2021) averages 13,184 miles.
Compared to the Mercedes brand average of 87%, the Sl 400 grand edition premium a performs 11 points better, making it one of the more reliable options in the Mercedes range.
Click any year in the table above to see detailed running costs, individual reliability data, and comparisons with similar cars.