2018 Mercedes-Benz Gls: MOT pass rate and reliability

87.2% of 2018 Mercedes-Benz Gls pass the MOT first time, measured across 580 DVSA tests on that model year alone. The average one had covered 55,433 miles.

How the 2018 compares

  • Against all Mercedes-Benz Gls (88.8%, 1,983 tests): -1.6 points
  • Against all 2018 cars (85.9%): +1.3 points
  • National first-time pass rate, all cars and years: 77%

Every Mercedes-Benz Gls 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 Gls:

Year Pass rate Tests Avg mileage
2016 88.6% 404 73,534
2017 89.8% 636 65,164
2018 87.2% 580 55,433
2019 89.6% 357 46,792

What this means if you are buying a 2018 Gls

The 2018 sits close to the Mercedes-Benz Gls 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 around average, so condition and service history will tell you more than the odometer does. On a 2018 Mercedes-Benz Gls the average at test was 55,433 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 2017 at 89.8%, and the weakest in our data is 2018 at 87.2%. That 2.6 point spread across the model's life is why comparing a 2018 car against a newer one tells you very little.

Nearby model years

All Mercedes-Benz Gls MOT data · Every model