2017 Mercedes-Benz C-Class · 153,460 MOT tests
2017 Mercedes-Benz C-Class reliability
2017 Mercedes-Benz C-Classs fail 14.9% of first MOT tests, 21% fewer MOT fails than the average car its age and mileage, ranking 8 of 25 C-Class years (153,460 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz C-Classs: 24%)
- 14.9%
- first-time fail rate (all Mercedes-Benz C-Classs: 24%)
- fails than cars of the same age and mileage
- 21% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 6
- 50,362
- typical miles at its MOT, aged about 6
- MOT tests, 2022 to 2024
- 153,460
- MOT tests, 2022 to 2024
Year on year
2017 against the years either side
- 2016 cars: 25% fewer MOT fails than the average car its age (the 2017 car does worse)
- 2018 cars: 20% fewer MOT fails than the average car its age (the 2017 car does better)
- Weak spot: exhaust, emissions and leaks, 2% of tests fail here (44% above cars of the same age and mileage).
- Strong point: lights and electrics, 67% fewer fails than comparable cars.
- Plates: a 2017 car carries a 66 plate (January–February 2017), or a 17 plate (March–August 2017), or a 67 plate (September–December 2017).
Common problems
What fails on a 2017 Mercedes-Benz C-Class
Fail rate by area
- Tyres6.9%
- Suspension2.9%
- Exhaust, emissions and leaks2%
- Lights and electrics1.7%
- Brakes1.6%
- Windscreen, wipers and mirrors1.5%
- Wheels0.7%
Average for cars of the same age and mileage
Top failures
Tyre tread below 1.6mm 2.44%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Tyre ply or cords exposed 1.38%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Suspension ball joint excessively worn 1.27%
A worn ball joint can fail and cause loss of steering control, so it must be replaced promptly.
Tyre cut reaching ply or cords 1.14%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Coil spring fractured or broken 0.87%
A broken coil spring can leave the car sitting low or unstable, so it must be replaced before driving.
Engine warning light inoperative or lit 0.83%
An engine warning light that is lit or not working can hide faults, so diagnosis is needed before buying.
Common advisories
Tyre worn close to legal limit (13.96%) · Brake pads wearing thin (5.59%) · Brake disc pitted or scored (4.43%) · Tyre slightly damaged or cracking (3.19%) · Suspension ball joint slight play (2.93%) · Tyre worn close to legal limit (2.04%)
Other years
Every Mercedes-Benz C-Class year
The full picture: Mercedes-Benz C-Class reliability. Before you pay for any Mercedes-Benz C-Class, a Full Check (£9.99) shows finance, stolen and write-off records the MOT can't.
Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2017 Mercedes-Benz C-Class reliable?
2017 Mercedes-Benz C-Classs fail 14.9% of first MOT tests, 21% fewer MOT fails than the average car its age and mileage, ranking 8 of 25 C-Class years (153,460 DVSA tests, 2022 to 2024).
What fails on a 2017 Mercedes-Benz C-Class MOT?
Most often tyre tread below 1.6mm (2.44% of tests), tyre ply or cords exposed (1.38% of tests), suspension ball joint excessively worn (1.27% of tests).
How many miles should a 2017 Mercedes-Benz C-Class have done?
At its MOT aged about 6, a typical 2017 Mercedes-Benz C-Class shows 50,362 miles. Much higher or lower is worth asking about.
What plate is a 2017 car?
A car first registered in 2017 carries a 66 plate (January–February 2017), or a 17 plate (March–August 2017), or a 67 plate (September–December 2017).
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