MERCEDES GLC 300 AMG LINE PREMIUM 4M A (2021)
Running costs, common problems, and reliability data based on 334 real MOT tests in 2024.
MOT Pass Rate
93%
Total Tests (2024)
334
Avg Mileage
27,121 mi
Est. Annual Cost
£1,772
Is the 2021 MERCEDES GLC 300 AMG LINE PREMIUM 4M A reliable?
Excellent reliability. Very few MOT failures. That's 11 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 3 years old, 93% of MERCEDES GLC 300 AMG LINE PREMIUM 4M As from 2021 passed their MOT first time in 2024. That's based on 334 tests across the UK. The average mileage at this age is 27,121 miles.
How does the 2021 MERCEDES GLC 300 AMG LINE PREMIUM 4M A compare?
Mileage Analysis
The average 2021 MERCEDES GLC 300 AMG LINE PREMIUM 4M A has 27,121 miles on the clock, which is above the expected 22,200 miles for a 3-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Best year to buy a MERCEDES GLC 300 AMG LINE PREMIUM 4M A?
The most reliable year is the 2020 model with a 94% MOT pass rate, while the 2019 model has the lowest at 85%. The 2021 sits between the two at 93%.
How much does a 2021 MERCEDES GLC 300 AMG LINE PREMIUM 4M A cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
MERCEDES GLC 300 AMG LINE PREMIUM 4M A by Year
Checking a specific MERCEDES GLC 300 AMG LINE PREMIUM 4M A?
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About the 2021 MERCEDES GLC 300 AMG LINE PREMIUM 4M A
The 2021 MERCEDES GLC 300 AMG LINE PREMIUM 4M A is a family car with a 1991cc hybrid engine. 334 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. Among all cars from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.
With an average of 27,121 miles at 3 years old, MERCEDES GLC 300 AMG LINE PREMIUM 4M A owners cover more miles than the average driver.
2021 MERCEDES GLC 300 AMG LINE PREMIUM 4M A Fuel Costs
The 1991cc hybrid engine offers a reasonable balance between performance and economy. Expect around 36 mpg in mixed driving, which works out to roughly £1,327 per year at current hybrid prices of 142p per litre (based on 7,400 miles per year). As a hybrid, real-world fuel costs will vary significantly depending on how much electric-only driving you do.
What does it cost to own a 2021 MERCEDES GLC 300 AMG LINE PREMIUM 4M A?
Total estimated annual running cost is £1,772 (£148/month), broken down as £1327 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 93% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
MERCEDES GLC 300 AMG LINE PREMIUM 4M A Reliability Trend
Newer MERCEDES GLC 300 AMG LINE PREMIUM 4M As show better MOT pass rates than older ones, with an average improvement of 9 percentage points.
Buying a Used 2021 MERCEDES GLC 300 AMG LINE PREMIUM 4M A
At 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet. If you're flexible on year, the 2020 model has the highest pass rate at 94%.
Alternatives to the 2021 MERCEDES GLC 300 AMG LINE PREMIUM 4M A
If reliability is your priority, there's one similar car with a higher MOT pass rate. Here are comparable hybrid cars with similar engines:
- TOYOTA YARIS (2019) 93% pass rate (same) from 41,554 tests
- MINI COOPER S (2019) 92% pass rate (-1%) from 33,682 tests
- LAND ROVER RANGE ROVER SPORT (2019) 94% pass rate (+1%) from 33,069 tests
- TOYOTA C-HR (2019) 92% pass rate (-1%) from 29,893 tests