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Mercedes-Benz GLC-Class: real-world fuel consumption

Fuel meter readings from 203,382 Mercedes-Benz GLC-Class cars reported in 2024, split by engine.

Official (WLTP)
Real world
+18%

Excluding plug-in hybrids, the average is 7.9 L/100 km on the road against 6.7 officially (18% above official).

Lowest real-world consumption: Diesel hybrid · 145 kW (197 hp) at 6.5 L/100 km.

Every engine: official vs real

EnginecarsOfficial (WLTP)Real worldGap
Petrol · 287 kW (390 hp)2,21811.012.1+10%
Petrol · 375 kW (510 hp)1,41013.114.6+12%
Petrol · 350 kW (476 hp)46413.014.2+9%
Diesel · 143 kW (194 hp)17,9456.37.5+18%
Diesel · 120 kW (163 hp)6,9926.27.2+16%
Diesel · 180 kW (245 hp)4,0006.88.0+18%
Diesel · 243 kW (330 hp)2,4407.48.7+17%
Hybrid · 150 kW (204 hp)13,0647.48.9+20%
Hybrid · 145 kW (197 hp)7,2588.49.8+16%
Hybrid · 190 kW (258 hp)6,5067.99.7+23%
Hybrid · 310 kW (421 hp)65310.512.6+21%
Diesel hybrid · 145 kW (197 hp)37,4185.46.5+22%
Diesel hybrid · 198 kW (269 hp)5,1675.87.3+27%
Diesel hybrid · 270 kW (367 hp)7976.68.1+22%

Engines with fewer than 100 cars in the data are not shown. Hybrid includes mild hybrids (48 V) as registered by the manufacturer.

Plug-in hybrid

EnginecarsOfficial (WLTP)Real worldElectric shareGap
Plug-in hybrid · 150 kW (204 hp)21,9990.55.343%+894%
Plug-in hybrid · 155 kW (211 hp)16,9002.37.522%+223%
Plug-in hybrid · 185 kW (252 hp)5,7640.65.941%+976%
Plug-in hybrid · 350 kW (476 hp)5697.513.59%+80%
Diesel plug-in hybrid · 143 kW (194 hp)32,2111.96.317%+229%
Diesel plug-in hybrid · 145 kW (197 hp)19,6070.64.834%+784%

The official WLTP figure for plug-in hybrids assumes a share of electric driving based on range. When cars are charged less often than assumed, real consumption is far higher.

By reporting year

carsReal world
20214,14410.1
202237,2968.3
202356,7538.1
2024106,3327.9

The same cars are reported again each year with their lifetime totals, so years are not added together.

Models: Mercedes-Benz

Source: European Environment Agency, real-world CO₂ emissions from cars, 2024 data (CC BY 4.0), based on on-board fuel consumption meters (Regulation (EU) 2019/631, Article 12). Grouping by model and engine, averages and percentiles by RealFuelConsumption. Not affiliated with the EEA or the manufacturer.