Mercedes-Benz GLC 300 AMG Line Prem + D 4M A MOT pass rate: 91.6% (4,734 tests, 2025)

The Mercedes-Benz GLC 300 AMG Line Prem + D 4M A passed 91.6% of its 4,734 MOT tests in 2025 — 14.1 points above the UK average of 77.5%. The median tested example was 5 years old with 38,439 miles on the clock.
91.6%Pass rate (2025)
4,734MOT tests analysed
38,439 miMedian mileage at test
5 yrsMedian age at test

How the GLC 300 AMG Line Prem + D 4M A compares

Mercedes-Benz GLC 300 AMG Line Prem + D 4M A

91.6%

UK average (all Class 4 vehicles)

77.5% across 33.1 million tests

Mercedes-Benz average (all models)

80.7%

What fails most on the Mercedes-Benz GLC 300 AMG Line Prem + D 4M A

Across failed and rectified tests in 2025, these vehicle systems produced the most defects on the GLC 300 AMG Line Prem + D 4M A:

#SystemDefects recordedShare
1Tyres34733.7%
2Suspension838.1%
3Brakes757.3%
4Tyres31930.9%
5Suspension12512.1%
6Brakes828.0%

Pre-MOT checklist for GLC 300 AMG Line Prem + D 4M A owners

Based on the failure profile above, ten minutes with a torch before your test removes the most likely fail items:

  • Check tread with the 20p test and inspect sidewalls for cracking — tyres close to the limit are the country’s most common advisory
  • Bounce each corner and listen for clonks over speed bumps — suspension is this model’s (and the UK’s) top failure system
  • Feel for a spongy pedal or pulling to one side; check pad wear through the wheel spokes if visible
  • Check tread with the 20p test and inspect sidewalls for cracking — tyres close to the limit are the country’s most common advisory
  • Bounce each corner and listen for clonks over speed bumps — suspension is this model’s (and the UK’s) top failure system
Check the engine before the tester does

A stored fault code with the engine light on is an automatic Major defect. Scan and clear resolved faults before booking.

GLC 300 AMG Line Prem + D 4M A pass rate by registration year

Registration yearTestsPass rateVs same-ageMedian mileage
2019 3,157 91.1% +2.7 pts 40,537
2020 5,016 91.9% +2.0 pts 32,986
2021 1,808 91.8% +1.3 pts 31,649

Check a specific GLC 300 AMG Line Prem + D 4M A before you buy

Pass rates describe the model; they can’t tell you about the one car you’re looking at. Run its plate through our free MOT history check to see its personal record of failures, advisories and mileage readings.

Other Mercedes-Benz models

C78.2% pass rate · 343,551 tests A-Class77.8% pass rate · 232,671 tests E79.7% pass rate · 215,896 tests A89.1% pass rate · 93,733 tests Vito73.4% pass rate · 81,263 tests GLC87.2% pass rate · 65,847 tests GLA83.1% pass rate · 64,404 tests CLA82.7% pass rate · 62,279 tests

FAQs

What is the MOT pass rate for a Mercedes-Benz GLC 300 AMG Line Prem + D 4M A?

In 2025, 91.6% of 4,734 first MOT tests on the Mercedes-Benz GLC 300 AMG Line Prem + D 4M A were passes (UK average: 77.5%). Data: DVSA anonymised MOT results.

What does the GLC 300 AMG Line Prem + D 4M A fail its MOT on most?

The biggest defect group is tyres (33.7% of its recorded defects), followed by suspension.

Is the Mercedes-Benz GLC 300 AMG Line Prem + D 4M A reliable?

MOT pass rate is one lens on durability: at 91.6% it performs above the national average at a median age of 5 years and 38,439 miles. Always check the individual car's history too.

Source: DVSA Anonymised MOT tests and results, 2025 extract (Class 4 initial tests only; retests excluded). Contains public sector information licensed under the Open Government Licence v3.0. Figures rounded to one decimal place.