Don't cancel your P85D reservation just yet, though. As you might have gathered, both projects are believed to be in the early stages. Porsche's electric sedan wouldn't arrive until 2018, while Mercedes may not have something to show until 2021. That slow response could give Tesla plenty of time to build up an audience, and the competition may only get fiercer when the more affordable Model 3 hits the road.
source: engadget.com by Jon Fingas