Back in the days of internal combustion engines, VW brought out several concepts that consumed just "1 liter". Mercedes takes up the baton with the electric EQXX 100%.
The EQXX was unveiled at the beginning of 2022 with a fuel consumption rating of less than 10 kWh/100 km and a range of over 1000 km on a single charge. As it is always necessary to prove one's claims, Mercedes carried out a test on open roads, from Sindelfingen in Germany to Cassis in France, via the Gotthard Tunnel and Milan in Italy.
According to Mercedes, the route was completed at an average speed of 87.4 km/h, with motorway sections at 140 km/h. It would seem that the speed limits were followed. This is believable, given the average speed, which is not 50 km/h. Result: 1,008 km on a single charge. Better still, on arrival at Cassis, the car still showed 140 km of range. All in all, this gives an electrical consumption of 8.7 kWh/100 km. This is a typical figure for a MIA in ultra-eco driving conditions.
It has to be said that the EQXX takes its cue from the VW XL1. First and foremost, its shape, with a flat bottom, a truncated rear to lift the air layer, lenticular rims, an active diffuser that kicks in at 60 km/h, and so on. The car was fitted with low-friction tires (coefficient 4.7) from Bridgestone, specifically developed for the EQXX concept. For comparison, the EQS has tires with a coefficient of 5.9. The higher the coefficient, the higher the fuel consumption.
Mercedes didn't take it easy on the course either, with mountains, freeways and so on. The weather didn't help either, with temperatures ranging from 3° to 18°. The EQXX's performance is due in no small part to its ultra-polished aero. After all, the car weighs 1,755 kg unladen. That's not much when you consider the large 100 kWh (900 volt) battery.
To lighten the car, Mercedes uses composite materials reinforced with sugarcane fiber, aluminum and more. The battery is also of a new generation. Mercedes says it is, for example, 50% smaller than that of the EQS, and 30% lighter. The 100 kWh battery weighs 495 kg, roughly the same as the 77 kWh battery in VW's ID.4. More range for the same weight!
On the consumption side, Mercedes has also maximized the entire electric circuit. 95% of the energy drawn from the battery actually ends up in the wheels. That's a few percent more than the best electric cars. An efficiency that is very difficult to improve on these last few percent.
The journey proves that the Mercedes Vision EQXX is indeed an ultra-efficient 100% electric vehicle. On the other hand, there's no miracle when it comes to charging. The maximum fast-charge power is 150 kW. Below this power level, the charge is still good, since it could be maintained for longer with a high-performance cooling system. In 15 minutes, the 8.7 kWh/100 km charge gives a range of over 400 km.
To complete the comparison, 8.7 kWh is equivalent to 0.8 liters of diesel. This is barely better than the VW XL1 fuel consumption (homologated) which was a diesel-electric hybrid. This concept weighed less than 800 kg. 45.3% of the weight of this Mercedes-Benz Vision EQXX. Weight, weight, weight... Well, the XL1's 0.9 l/100 km was according to the NEDC cycle, and in reality, it was more like 1.5 to 1.9 l/100 km.
Back in the days of internal combustion engines, VW brought out several concepts that consumed just "1 liter". Mercedes takes up the baton with the electric EQXX 100%.
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