New spy shots have revealed Porsche has started cold weather testing its all-electric Mission E that will enter production in 2019. It will offer a range of up to 310 miles and debut new rapid charging technology. Porsche’s first all-electric saloon will spawn various models, with different power outputs and over-the-air updates. These latest images don't show any drastic changes to the Mission E prototype; a new set of wheels likely to be wrapped in winter tyres are the only difference. A pair of five-spoke wheels are seen at the front while the rear wheels are fitted with a 15-spoke design.

Porsche is aiming to sell up to 20,000 Mission Es a year and is looking at supplementing the range with a high-performance GT-E variant, as well as other versions with varying power outputs. If you buy one, you can trust us at Precision Porsche to look after it for you.