Mercedes had a singular goal: Build a one-off concept vehicle that could travel 1000 kilometers (621 miles) on one charge from a battery pack slightly smaller than 100kWh. The result was the EQXX, a coupe that looks as good as the technology that powers it. Typically these vehicles are off limits to anyone outside of a chosen few within an automaker. But Mercedes decided to let us behind the wheel for a test drive.

Designed to slip through the air with as little drag as possible, the EQXX doesn’t wow with off-the-line performance. Instead, the power really comes after you’ve gotten to highway speed. But even then, the concept vehicle is an efficiency machine that feels like the future. Mercedes has no plans to put the EQXX into production, but what it’s learning now will at some point land in its vehicles. Watch the video below for the full story.