Mercedes SL 400 Grand Edition Premium A

Reliability, estimated running costs, and MOT data across 3 model years from 494 MOT tests in 2024.

Avg Pass Rate

98%

Total Tests

494

Model Years

2019 to 2021

Years Covered

About the Mercedes SL 400 Grand Edition Premium A

The Mercedes SL 400 Grand Edition Premium A was MOT tested 494 times in 2024 (DVSA data, retests included) across 3 model years (2019 to 2021), with an average pass rate of 98%. That's comfortably above the average of 82% across all models in our data. Our records list petrol versions.

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.

Estimated Running Costs

Fuel (Petrol, 2996cc)

£1,958

Road Tax

£200

MOT Test

£55

Predicted Repairs

£200

Total per year£2,413

Per month£201/mo

Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.

Full 2021 details

How reliable is the Mercedes SL 400 Grand Edition Premium A?

vs average of all models+16% (82% avg)

vs Mercedes brand average+11% (87% avg)

Mercedes SL 400 Grand Edition Premium A by Year

Click any year to see detailed running costs, reliability data, and comparisons with similar cars.

Year	Pass Rate	Tests	Avg Mileage
2021	100%	41	13,184 mi
2020	97%	262	16,304 mi
2019	97%	191	21,109 mi

Questions about the Mercedes SL 400 Grand Edition Premium A

Is the Mercedes SL 400 Grand Edition Premium A reliable?

Across its 3 model years in our data (2019 to 2021), the Mercedes SL 400 Grand Edition Premium A averages a 98% MOT pass rate, from 494 tests (DVSA MOT data for tests in 2024, retests included). That's 16 points above the average of 82% across all models in the same data.