2018 Mercedes-Benz SLC · 5,999 MOT tests
2018 Mercedes-Benz SLC reliability
2018 Mercedes-Benz SLCs fail 9.6% of first MOT tests, 22% fewer MOT fails than the average car its age and mileage, ranking 3 of 5 SLC years (5,999 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz SLCs: 11.8%)
- 9.6%
- first-time fail rate (all Mercedes-Benz SLCs: 11.8%)
- fails than cars of the same age and mileage
- 22% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 5
- 22,463
- typical miles at its MOT, aged about 5
- MOT tests, 2022 to 2024
- 5,999
- MOT tests, 2022 to 2024
Year on year
2018 against the years either side
- 2017 cars: 13% fewer MOT fails than the average car its age (the 2018 car does better)
- 2019 cars: 27% fewer MOT fails than the average car its age (the 2018 car does worse)
- Weak spot: tyres, 5.5% of tests fail here (41% above cars of the same age and mileage).
- Strong point: lights and electrics, 43% fewer fails than comparable cars.
- Plates: a 2018 car carries a 67 plate (January–February 2018), or a 18 plate (March–August 2018), or a 68 plate (September–December 2018).
Common problems
What fails on a 2018 Mercedes-Benz SLC
Fail rate by area
- Tyres5.5%
- Lights and electrics1.6%
- Suspension0.9%
- Brakes0.8%
- Exhaust, emissions and leaks0.7%
- Windscreen, wipers and mirrors0.6%
- Number plates and VIN0.3%
Average for cars of the same age and mileage
Top failures
Tyre cut reaching ply or cords 1.72%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Tyre ply or cords exposed 1.65%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Tyre tread below 1.6mm 0.67%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Headlamp aim set too high 0.48%
Headlamps aimed too high can dazzle other drivers, and adjusting them is usually a quick job.
Headlamp aim set too low 0.33%
Headlamps aimed too low light the road poorly and reduce the driver's view ahead, especially at night.
Lambda reading outside specified limits 0.33%
An out-of-range lambda reading suggests poor fuel mixture or a failing catalytic converter, so diagnosis is needed.
Common advisories
Tyre worn close to legal limit (8.97%) · Tyre slightly damaged or cracking (6.28%) · Tyre has a shallow cut (3.03%) · Tyre showing slight damage (1.43%) · Tyre worn close to legal limit (1.17%) · Nail in tyre, monitor (1.1%)
Other years
Every Mercedes-Benz SLC year
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Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2018 Mercedes-Benz SLC reliable?
2018 Mercedes-Benz SLCs fail 9.6% of first MOT tests, 22% fewer MOT fails than the average car its age and mileage, ranking 3 of 5 SLC years (5,999 DVSA tests, 2022 to 2024).
What fails on a 2018 Mercedes-Benz SLC MOT?
Most often tyre cut reaching ply or cords (1.72% of tests), tyre ply or cords exposed (1.65% of tests), tyre tread below 1.6mm (0.67% of tests).
How many miles should a 2018 Mercedes-Benz SLC have done?
At its MOT aged about 5, a typical 2018 Mercedes-Benz SLC shows 22,463 miles. Much higher or lower is worth asking about.
What plate is a 2018 car?
A car first registered in 2018 carries a 67 plate (January–February 2018), or a 18 plate (March–August 2018), or a 68 plate (September–December 2018).
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