Mercedes has made its popular electric Sprinter van even more efficient by boosting its emission-free range and beefing up the batteries. The revamped van, unveiled in Los Angeles and set to be launched in other markets later this year, features an improved electric drive and will be priced in Europe at around €40,000 and rising to more €70,000 for better-equipped versions. The van is now in production at Mercedes’ Charleston, South Carolina, plant, as well as at the company’s German plants in Ludwigsfelde and Düsseldorf. The manufacturer has said it will only sell electric vehicles after 2030…