It's been two years since the union between Mercedes-Benz and BYD, and now the first fruits of that labor are about to be unveiled. The joint venture will sell a line of electric vehicles under the Denza brand name, starting with the E6 built on the platform from the first-generation Mercedes-Benz B-Class, a preview of which is shown above in a a Chinese patent filing.

Mercedes is said to be handling design and chassis duties, while BYD is developing the lithium-ion phosphate cells and driveline that will occupy the sandwich floor. Prototypes have been running since last April, at least 40 of which have racked up nearly two million miles as taxis. Range is said to be up to 186 miles, and we should get a first look at the real thing at next month's Beijing Auto Show.