Mercedes SLC
Reliability, estimated running costs, and MOT data across 6 model years from 18,733 MOT tests in 2024.
Avg Pass Rate
93%
Total Tests
18,733
Highest Pass Rate
2019 (94%)
Years Covered
6
About the Mercedes SLC
The Mercedes SLC was MOT tested 18,733 times in 2024 (DVSA data, retests included) across 6 model years (2016 to 2021), with an average pass rate of 93%. That's comfortably above the average of 82% across all models in our data. Our records list petrol versions.
Best and Worst Years
Of the years with at least 100 tests, the 2019 model has the highest pass rate at 94% from 1,972 tests. The 2016 model has the lowest at 89%. With just a 5 point gap, pass rates are similar across these years. Newer cars usually pass more often simply because they are younger.
Reliability Trend
Newer Mercedes SLCs pass their MOT more often than older ones, by 4 percentage points on average, which is mostly down to age and wear.
Mileage Across Years
The oldest model in our data (2016) averages 41,461 miles, while the newest (2021) averages 13,659 miles.
Compared to the Mercedes brand average of 87%, the SLC performs 6 points better, making it one of the more reliable options in the Mercedes range.
Estimated Running Costs
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 detailsHow reliable is the Mercedes SLC?
Mercedes SLC by Year
Click any year to see detailed running costs, reliability data, and comparisons with similar cars.
Questions about the Mercedes SLC
Is the Mercedes SLC reliable?
Across its 6 model years in our data (2016 to 2021), the Mercedes SLC averages a 93% MOT pass rate, from 18,733 tests (DVSA MOT data for tests in 2024, retests included). That's 11 points above the average of 82% across all models in the same data. The 2019 model has the highest pass rate of the years with at least 100 tests, at 94%.
Which year Mercedes SLC has the best MOT pass rate?
Of the years with at least 100 tests, the 2019 Mercedes SLC has the highest MOT pass rate at 94%, while the 2016 model has the lowest at 89%, a 5 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
Are newer Mercedes SLCs more reliable?
Newer Mercedes SLCs pass their MOT more often than older ones, by 4 percentage points on average, which is mostly down to age and wear.
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