2020 Mercedes-Benz SLC: common problems and MOT failures
What MOT testers find on the Mercedes-Benz SLC first registered in 2020: we looked at the 1,766 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.
Common 2020 Mercedes-Benz SLC MOT failures and advisories
The share of 2020 Mercedes-Benz SLC MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Tyres21% of testsRough price £70–£150
At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.
- Lights and electrics5% of testsRough price £10–£80
At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.
- Brakes2% of testsRough price £150–£350
At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.
- Wipers, windscreen and mirrors2% of testsRough price £15–£250
At the viewing: Check for chips in the driver's view, and test the wipers and washers.
- Suspension1% of testsRough price £120–£400
At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.
Questions to ask the seller before buying a 2020 Mercedes-Benz SLC
Ask before you travel to see it. A seller who knows the car will have answers, and receipts.
- Can I see the service history and receipts for any big jobs?
Looking at a Mercedes-Benz SLC?
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Other years
Every year of the Mercedes-Benz SLC compared
| Year | MOT tests | Most flagged |
|---|---|---|
| 2021 | 386 | Tyres 23% |
| 2019 | 2,936 | Tyres 26% |
| 2018 | 4,423 | Tyres 29% |
| 2017 | 10,226 | Tyres 29% |
| 2016 | 6,698 | Tyres 29% |
Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of Mercedes-Benz SLC cars first registered in 2020. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score