MERCEDES SLC (2018)
Running costs, common problems, and reliability data based on 3,335 real MOT tests in 2024.
MOT Pass Rate
92%
Total Tests (2024)
3,335
Avg Mileage
28,655 mi
Est. Annual Cost
£2,037
Is the 2018 MERCEDES SLC reliable?
Excellent reliability. Very few MOT failures. That's 10 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 6 years old, 92% of MERCEDES SLCs from 2018 passed their MOT first time in 2024. That's based on 3,335 tests across the UK. The average mileage at this age is 28,655 miles.
How does the 2018 MERCEDES SLC compare?
Mileage Analysis
The average 2018 MERCEDES SLC has 28,655 miles on the clock, which is below the expected 44,400 miles for a 6-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Best year to buy a MERCEDES SLC?
The most reliable year is the 2021 model with a 98% MOT pass rate, while the 2016 model has the lowest at 89%. The 2018 sits between the two at 92%.
How much does a 2018 MERCEDES SLC cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
MERCEDES SLC by Year
Checking a specific MERCEDES SLC?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2018 MERCEDES SLC
The 2018 MERCEDES SLC is a large car with a 2996cc petrol engine. 3,335 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. Among all cars from 2018, the average MOT pass rate is 89%, and this model beats that benchmark.
With an average of 28,655 miles at 6 years old, MERCEDES SLC owners tend to use this car less than the typical driver.
2018 MERCEDES SLC Fuel Costs
The 2996cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2018 MERCEDES SLC?
Total estimated annual running cost is £2,037 (£170/month), broken down as £1592 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 92% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
MERCEDES SLC Reliability Trend
Newer MERCEDES SLCs show better MOT pass rates than older ones, with an average improvement of 5 percentage points.
Buying a Used 2018 MERCEDES SLC
At 6 years old, the MERCEDES SLC offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2021 model has the highest pass rate at 98%.
Alternatives to the 2018 MERCEDES SLC
If reliability is your priority, there are 2 similar cars with a higher MOT pass rate. Here are comparable petrol cars with similar engines:
- BMW 5 SERIES (2018) 91% pass rate (-1%) from 40,272 tests
- LAND ROVER RANGE ROVER SPORT (2018) 93% pass rate (+1%) from 34,257 tests
- BMW X3 (2019) 92% pass rate (same) from 32,937 tests
- MERCEDES GLC (2019) 93% pass rate (+1%) from 30,341 tests