Mercedes Benz GLC 2021 running costs in United Kingdom
Official UK VCA merged archive figure for the 2021 Mercedes Benz GLC: 28–49 mpg (UK), 154–232 g/km CO₂. At United Kingdom prices (£1.64/L petrol), driving 12,000 miles a year costs about £3,199 — £0.17 per mile.
Official figures — 2021 Mercedes Benz GLC
| Fuel types | Petrol · Diesel · Plug In Hybrid |
|---|---|
| Official consumption | 28.0–48.7 mpg (UK) |
| CO₂ (official) | 154–232 g/km |
| Configurations in source data | 3 |
| Data source | UK VCA merged archive — WLTP test cycle |
What it costs to run in United Kingdom
| Petrol (28.0 mpg (UK)) | £3,199/year |
|---|---|
| MOT | £54.85/year |
| Typical annual road tax | £190/year |
| Estimated annual running cost | £3,444/year ≈ £287/month |
Assumes 12,000 miles a year and the current average United Kingdom prices shown above (GOV.UK weekly road fuel prices, Sep 2026 (164.4p)). Insurance is not included because it depends on your age, history and the policy — add it in the full ownership calculator. Servicing, tyres and repairs also vary by car and driver.
How it compares with other petrol cars in United Kingdom
The average petrol car in our United Kingdom dataset uses 7.9 L/100km. The 2021 Mercedes Benz GLC uses 10.1 L/100km — about 27.8% more than that average, or roughly £697 extra a year at 12,000 miles.
2021 Mercedes Benz GLC — configurations in the official data
| Fuel | Consumption | CO₂ | Engine | Power | Source variant |
|---|---|---|---|---|---|
| Petrol | 10.1 L/100km | 232 g/km | — | — | 1 versions · WLTP · median 28 mpg (UK) |
| Diesel | 5.8 L/100km | 154 g/km | — | — | 1 versions · WLTP · median 49 mpg (UK) |
| Plug In Hybrid | 8.3 L/100km | 188 g/km | — | — | 1 versions · WLTP · median 34 mpg (UK) |
Figures are the official certified values recorded in the UK VCA merged archive, grouped across 3 configurations. Real-world consumption is typically higher than the certified figure.
Related
Mercedes Benz GLC 2020 · All United Kingdom cars · Full United Kingdom running-cost calculator · United Kingdom fuel cost calculator
These are estimates built from official certified figures and current average prices. They are not financial advice. Verify the exact figure for the car you are buying — consumption varies by trim, tyres and driving style.