Mercedes GLC 400 Electric highway range and fast-charging test

The Mercedes GLC 400 4MATIC completed a 632 km Eurocharge leg with one 17-minute charging stop. Highway consumption was 21.4 kWh/100 km, implying about 439 km of range in those conditions.

Author: Dmitry Novikov

14:53 19-09-2026

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632 km and just one fast-charge stop — but that does not mean the Mercedes GLC Electric can travel that far on a single battery charge. On the third Eurocharge leg, the electric GLC 400 4MATIC drove from Hungary to the Austrian Alps, with about 80% of the route on motorways where the car was travelling mostly at around 130 km/h.

After the first 308 km, the car reached a charging station with 31% remaining. In 17 minutes, the state of charge rose to 81%: 51 kWh was added to the battery, peak power reached 275 kW and the session averaged about 180 kW. The battery was not preconditioned before the stop.

The GLC then covered another 324 km and finished the day at 7%. Total distance was 632 km, with average consumption of 21.4 kWh/100 km. With 94 kWh of usable battery capacity, that consumption corresponds to roughly 439 km of calculated range from a full battery under the same conditions.

The gap to the official figures is substantial, but the comparison needs context. Eurocharge lists 673 km on the WLTP cycle for its car, while the current German Mercedes-Benz specification gives the GLC 400 a range of 568–715 km depending on configuration. Against the test car's 673 km figure, the calculated 439 km at this type of motorway pace is about 35% lower.

Fast charging partly offsets the loss of real-world range. Mercedes allows up to 330 kW, the battery has 94 kWh of usable capacity, and the claimed 10–80% charging time is about 22 minutes. On the trip, a short lunch stop was enough to take on the energy needed for the second half of the route.

This also complements a recent comparison of four electric SUVs in which the same GLC returned a calculated 627 km under a different driving pattern. The two results are not contradictory: speed, route profile and conditions can change an EV's consumption dramatically.

The GLC range itself offers different trade-offs as well: the more affordable rear-wheel-drive GLC 250 gives up power and all-wheel drive for a lower price and greater efficiency. Eurocharge highlights another side of the electric GLC 400: on a long journey, its strength is not record-breaking single-charge range but the ability to put a large amount of energy back into the battery quickly and keep moving.