Mercedes Vision EQXX Goes 626 Miles on a Single Charge

  • Mercedes-Benz Vision EQXX concept is driven from Sindelfingen, Germany, to Cassis on the Côte d’Azur, demonstrating its 1000-kilometer potential.
  • The prototype features a 100-kWh battery and uses a number of advanced technologies to achieve an exceptionally long range on a single charge, including lightweight materials and recuperative braking.
  • The prototype sedan still had range left over when it arrived in France on its 626-mile trip.

The ambitious Mercedes-Benz EQXX concept proved it could accomplish the feat for which it was designed, covering a range of 1000 kilometers or 621 miles on a single charge. The battery-electric sedan completed a trip from the automaker’s main plant in Sindelfingen, Germany, to Cassis on the Côte d’Azur, France, under everyday traffic conditions. And it arrived at its destination with juice to spare, still displaying a 15% state of charge.Related Story2022 Mercedes EQS 450+ Is a Lesson in EVs

The trip itself started out under rainy and cold conditions, normal for Germany this time of year, with the EQXX traveling on the autobahn from Sindelfingen to the Swiss border. The sedan reached speeds of 87 mph during this leg of the trip, so it wasn’t using hypermiling tactics to reduce energy consumption, instead relying on its slippery 0.17 Cd shape and low rolling-resistance tires developed just for this car by Bridgestone.

The route soon tested another aspect of the Vision EQXX concept. Approaching Italy, a nine-mile section between Amsteg and Göschenen features a steep incline of up to 5%. This is where curb weight counts, and with the sedan weighing just 3869 pounds thanks to judicious use of lightweight materials including carbon fiber, it was able to preserve energy in uphill sections of the trip.

2022 mercedesbenz vision eqxx

The Vision EQXX sedan is relatively small despite using a 100-kWh battery.MERCEDES-BENZ

«At 100 kWh, the power storage unit developed specifically for the Vision EQXX has almost the same amount of energy as the battery of the EQS, which is already a global benchmark among electric cars currently on the market,» Mercedes points out. «However, it has 50% less volume and is 30% lighter. The outcome is that the compact battery, measuring just 200 x 126 x 11 cm (79 x 50 x 4 inches), is also comparatively light at 1091 pounds and fits in a compact car.»

The next leg of the trip, after the Gotthard Tunnel, actually saw the sedan generate energy through recuperation while traveling downhill. The Vision EQXX got another boost of energy from its solar roof as the skies opened up in Italy, near Milan. The 117 individual solar cells actually feed the 12-volt battery, which powers auxiliary systems in the car. But the energy saved increases the range over 2%, adding about 16 miles to a trip of over 621 miles.Related StoryMercedes-AMG EQE Is a 677-HP Electric Rocket

The Vision EQXX is powered by a 241-hp motor, and unusually for an EV it still has a transmission, allowing it to travel at highway speeds without expending as much power as single-speed EVs typically do. This allows the drivetrain to offer energy efficiency of 95%—that’s how much of the battery’s energy is actually sent to the wheels. This setup has allowed Mercedes to reduce drivetrain losses 44% compared to single-speed EVs, the automaker says.

The battery, meanwhile, features energy density of almost 400 Wh/L, and an operating voltage of over 900 volts. The battery is cooled passively to further preserve energy, with the cooling plate in the underbody using airflow. This form of cooling increases the range by about 12 miles, as opposed to active cooling, which eats up energy.

The trip took 11 hours and 32 minutes, with the final distance measuring 1008 kilometers, or 626 miles.

2022 mercedesbenz vision eqxx

A significant portion of the trip was on the autobahn in Germany, where the sedan traveled at up to 87 mph.MERCEDES-BENZ

«With our successful road trip to the South of France, we’ve shown that efficiency is the new currency,» said Markus Schäfer, member of the Board of Management of Mercedes-Benz Group AG, Chief Technology Officer responsible for Development and Purchasing. «And this success also clearly speaks for our new collaborative development process, incorporating many learnings from the Mercedes-AMG F1 team and its cutting-edge expertise in electric powertrains.»

The Vision EQXX is a handmade EV purpose-built for this kind of efficiency, and the price tag for such a vehicle likely in the mid seven figures when it comes to materials alone, if not more, before we even get to factors like the work hours spent by engineers and fabricators. With advanced technology borrowed from all divisions of Mercedes-Benz—and a money-no-object budget—the EQXX proves a lightweight all-electric sedan with an advanced drivetrain can cover over 621 miles on a single charge.

But history also has shown that what seems experimental and incredibly expensive to build one day can seem quite ordinary just a few years down the road, as technology trickles down into production cars.

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