Mercedes EQXX Beats Own Record, Goes 747 Miles

• Mercedes-Benz Vision EQXX sedan travels from Germany to Silverstone in the United Kingdom on a single charge, covering 1202 kilometers or 746.8 miles.

• The ultra-efficient sedan was able to beat its own record from earlier in the spring by a significant margin.

• Powered by a 100-kWh battery, the EQXX uses a number of technologies to achieve a high energy efficiency, giving the sleek and low sedan an exceptionally long range.

It was just a few weeks ago the Mercedes-Benz Vision EQXX completed a trip from Sindelfingen, Germany, to Cassis on the Mediterranean coast of France, covering 626 miles on a single charge. The 11 hour and 32 minute April adventure saw plenty of rain and some chilly weather, along with plenty of tunnels. But in many ways it was a much more straightforward journey with far fewer variables than heading west and crossing the English Channel and braving London ring road traffic.

That's exactly what a team of Mercedes drivers and engineers did this week, taking the EQXX sedan from Stuttgart, Germany, to Silverstone in the UK, once again on a single charge, covering 1202 kilometers or 746.8 miles.

The EQXX, of course, was built for this sort of thing, with its slippery 0.17 Cd, a 100-kWh battery and low rolling-resistance tires developed by Bridgestone. The smallish four-door is meant to be a technology demonstrator, and it's certainly packed with technology to allow it to squeeze every last drop of energy out of the battery feeding its 241-hp motor.

The team took off from Stuttgart, covering hundreds of kilometers on the autobahn to the French border near Strasbourg, and continuing on to Calais and boarding the Eurotunnel. After emerging on the other side, the EQXX took the M25 around London—notorious for slow traffic—and stopped at Mercedes-Benz Grand Prix in Brackley, where the EQXX met Formula 1 and Formula E experts who helped develop it.