Introduced in Europe in late 2013, the Mitsubishi Outlander PHEV became in May 2014 not only the best selling plug-in vehicle that month, but also Europe’s top selling plug-in vehicle thus far in 2014.
The Outlander plug-in hybrid has sold over 6000 units this year, ahead of the 5500 of the Nissan Leaf, and the 4100 Tesla Model S.

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http://insideevs.com/mitsubishi-outlander-phev-becomes-europes-best-selling-plug-in-vehicle/