2018 Mercedes-Benz X: MOT pass rate and reliability
81.8% of 2018 Mercedes-Benz X pass the MOT first time, measured across 1,398 DVSA tests on that model year alone. The average one had covered 69,910 miles.
How the 2018 compares
- Against all Mercedes-Benz X (83.1%, 4,068 tests): -1.3 points
- Against all 2018 cars (85.9%): -4.1 points
- National first-time pass rate, all cars and years: 77%
Every Mercedes-Benz X model year
Pass rates fall as cars age, so the only fair comparison for a 2018 car is other cars of the same age. The full run for the Mercedes-Benz X:
| Year | Pass rate | Tests | Avg mileage |
|---|---|---|---|
| 2018 | 81.8% | 1,398 | 69,910 |
| 2019 | 83.3% | 1,803 | 59,094 |
| 2020 | 85.8% | 711 | 48,137 |
What this means if you are buying a 2018 X
The 2018 sits close to the Mercedes-Benz X average, so there is no strong model-year signal either way. Judge the individual car on its own history. Check the exact car with the free MOT history checker before you buy, and run its VIN and mileage through our free VIN decoder and clocking check.
What an 8-year-old car fails on
A 2018 car is 8 years old now, and age drives the failure mix more than the badge does. Across all cars tested, these are the categories that actually cause failures:
- Lights and electrical: 10.36% of all cars tested
- Suspension: 8.65% of all cars tested
- Tyres: 6.23% of all cars tested
- Brakes: 6.1% of all cars tested
- Visibility: wipers, washers, glass: 4.65% of all cars tested
- Body, chassis and structure: 3.18% of all cars tested
That is a shade above the middle of the range, still ordinary wear rather than a red flag, but worth checking against the service book for the car's age. On a 2018 Mercedes-Benz X the average at test was 69,910 miles, so treat anything far above that as a car that has worked harder than its peers, and anything far below as one worth checking for the faults that come from standing still.
The strongest year for this model is 2020 at 85.8%, and the weakest in our data is 2018 at 81.8%. That 4.0 point spread across the model's life is why comparing a 2018 car against a newer one tells you very little.
Nearby model years
- 2019 Mercedes-Benz X - 83.3%
- 2020 Mercedes-Benz X - 85.8%