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MERCEDES GLC 300 AMG LINE PREM+ E 4M A (2021)

Running costs, common problems, and reliability data based on 330 real MOT tests in 2024.

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MOT Pass Rate

95%

Total Tests (2024)

330

Avg Mileage

24,815 mi

Est. Annual Cost

£1,772

Is the 2021 MERCEDES GLC 300 AMG LINE PREM+ E 4M A reliable?

Excellent reliability. Very few MOT failures. That's 13 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.

At 3 years old, 95% of MERCEDES GLC 300 AMG LINE PREM+ E 4M As from 2021 passed their MOT first time in 2024. That's based on 330 tests across the UK. The average mileage at this age is 24,815 miles.

How does the 2021 MERCEDES GLC 300 AMG LINE PREM+ E 4M A compare?

Rank among all 2021 cars908th out of 3,373(top 27%)
Rank among all MERCEDES models242th out of 1,408(top 17%)
vs national average+13% (82% avg)
vs 2021 cars average+3% (92% avg)
vs MERCEDES average+8% (87% avg)

Mileage Analysis

The average 2021 MERCEDES GLC 300 AMG LINE PREM+ E 4M A has 24,815 miles on the clock, which is in line with the expected 22,200 miles for a 3-year-old car, suggesting normal everyday use.

How much does a 2021 MERCEDES GLC 300 AMG LINE PREM+ E 4M A cost to run?

⛽Fuel (Hybrid, 1991cc)
£1,327
🏛️Road Tax
£190
🔧MOT Test
£55
🛠️Predicted Repairs
£200
Total per year£1,772
Per month£148/mo

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 PREM+ E 4M A by Year

YearPass RateTestsAvg Mileage
2022100%4026,103 mi
202195%33024,815 mi
202090%16431,971 mi

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About the 2021 MERCEDES GLC 300 AMG LINE PREM+ E 4M A

The 2021 MERCEDES GLC 300 AMG LINE PREM+ E 4M A is a family car with a 1991cc hybrid engine. 330 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 24,815 miles at 3 years old, MERCEDES GLC 300 AMG LINE PREM+ E 4M A owners drive about as much as the UK average.

2021 MERCEDES GLC 300 AMG LINE PREM+ E 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 PREM+ E 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 95% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

Buying a Used 2021 MERCEDES GLC 300 AMG LINE PREM+ E 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.

Alternatives to the 2021 MERCEDES GLC 300 AMG LINE PREM+ E 4M A

The MERCEDES GLC 300 AMG LINE PREM+ E 4M A is actually the most reliable option among similar hybrid family cars from this era. Here are comparable hybrid cars with similar engines: