Mercedes GLC

Reliability, estimated running costs, and MOT data across 8 model years from 139,021 MOT tests in 2024.

Avg Pass Rate

92%

Total Tests

139,021

Highest Pass Rate

2021 (95%)

Years Covered

About the Mercedes GLC

The Mercedes GLC was MOT tested 139,021 times in 2024 (DVSA data, retests included) across 8 model years (2015 to 2022), with an average pass rate of 92%. That's comfortably above the average of 82% across all models in our data. Our records list diesel and petrol versions.

Best and Worst Years

Of the years with at least 100 tests, the 2021 model has the highest pass rate at 95% from 6,414 tests. The 2015 model has the lowest at 89%. The 6 point gap means pass rates vary somewhat between years, but no year is dramatically different. Newer cars usually pass more often simply because they are younger.

Reliability Trend

Newer Mercedes GLCs pass their MOT more often than older ones, by 4 percentage points on average, which is mostly down to age and wear.

Mileage Across Years

The oldest model in our data (2015) averages 76,191 miles, while the newest (2022) averages 25,971 miles.

Compared to the Mercedes brand average of 87%, the GLC performs 5 points better, making it one of the more reliable options in the Mercedes range.

Estimated Running Costs

Fuel (Petrol, 2996cc)

£1,958

Road Tax

£200

MOT Test

£55

Predicted Repairs

£200

Total per year£2,413

Per month£201/mo

Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.

Full 2022 details

How reliable is the Mercedes GLC?

vs average of all models+10% (82% avg)

vs Mercedes brand average+5% (87% avg)

Best to worst year spread6 percentage points

Reliability trendImproving over years

Mercedes GLC by Year

Click any year to see detailed running costs, reliability data, and comparisons with similar cars.

Year	Pass Rate	Tests	Avg Mileage
2022	96%	294	25,971 mi
2021	95%	6,414	29,460 mi
2020	94%	9,614	36,815 mi
2019	93%	30,341	42,501 mi
2018	91%	40,494	51,301 mi
2017	90%	28,866	61,718 mi
2016	89%	19,967	71,320 mi
2015	89%	3,031	76,191 mi

Questions about the Mercedes GLC

Is the Mercedes GLC reliable?

Across its 8 model years in our data (2015 to 2022), the Mercedes GLC averages a 92% MOT pass rate, from 139,021 tests (DVSA MOT data for tests in 2024, retests included). That's 10 points above the average of 82% across all models in the same data. The 2021 model has the highest pass rate of the years with at least 100 tests, at 95%.

Which year Mercedes GLC has the best MOT pass rate?

Of the years with at least 100 tests, the 2021 Mercedes GLC has the highest MOT pass rate at 95%, while the 2015 model has the lowest at 89%, a 6 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.